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Ngwe Tun MM, Luvai EAC, Toizumi M, Moriuchi M, Takamatsu Y, Inoue S, Urano T, Bui MX, Thai Hung D, Thi Nguyen HA, Anh DD, Yoshida LM, Moriuchi H, Morita K. Possible vertical transmission of Chikungunya virus infection detected in the cord blood samples from a birth cohort in Vietnam. J Infect Public Health 2024; 17:1050-1056. [PMID: 38688178 DOI: 10.1016/j.jiph.2024.04.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 04/06/2024] [Accepted: 04/15/2024] [Indexed: 05/02/2024] Open
Abstract
BACKGROUND Chikungunya virus (CHIKV) is an alphavirus (genus Alphavirus, family Togaviridae) that is primarily transmitted to humans by Aedes mosquitoes, and can be transmitted from mother to child. Little is known about CHIKV transmission in Vietnam, where dengue is endemic and Aedes mosquitoes are abundant. This study aimed to determine the prevalence and characteristics of vertical CHIKV infection in a birth cohort, and seroprevalence of anti-CHIKV antibodies with or without confirmation by neutralization tests among women bearing children in Vietnam. METHODS We collected umbilical cord blood plasma samples from each newly delivered baby in Nha Trang, Central Vietnam, between July 2017 and September 2018. Samples were subjected to molecular assay (quantitative real-time RT-PCR) and serological tests (anti-CHIKV IgM capture and IgG indirect enzyme-linked immunosorbent assay, and neutralization tests). RESULTS Of the 2012 tested cord blood samples from newly delivered babies, the CHIKV viral genome was detected in 6 (0.3%) samples by RT-PCR, whereas, 15 samples (0.7%) were anti-CHIKV-IgM positive. Overall, 18 (0.9%, 95% CI: 0.6-1.5) samples, including three positives for both CHIKV IgM and viral genome on RT-PCR, were regarded as vertical transmission of CHIKV infection. Of the 2012 cord blood samples, 10 (0.5%, 95% CI: 0.2-0.9) were positive for both anti-CHIKV IgM and IgG. Twenty-nine (1.4%, 95% CI: 1.0-2.1) were seropositive for anti-CHIKV IgG while 26 (1.3%, 95% CI: 0.8-1.9) of them were also positive for neutralizing antibodies, and regarded as seropositive with neutralization against CHIKV infection. CONCLUSION This is the first report of a possible CHIKV maternal-neonatal infection in a birth cohort in Vietnam. The findings indicate that follow-up and a differential diagnosis of CHIKV infection in pregnant women are needed to clarify the potential for CHIKV vertical transmission and its impact in the newborn.
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Affiliation(s)
- Mya Myat Ngwe Tun
- Department of Virology, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan; Department of Tropical Viral Vaccine Development, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan; Center for Vaccines and Therapeutic Antibodies for Emerging Infectious Diseases, Shimane University, Izumo, Japan.
| | - Elizabeth Ajema Chebichi Luvai
- Department of Virology, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan; Department of Biomedical Sciences and Technology, Technical University of Kenya, Nairobi, Kenya
| | - Michiko Toizumi
- Department of Pediatric Infectious Diseases, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Masako Moriuchi
- Department of Pediatrics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Yuki Takamatsu
- Department of Virology, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan; Department of Tropical Viral Vaccine Development, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Shingo Inoue
- Kenya Research Station, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Takeshi Urano
- Center for Vaccines and Therapeutic Antibodies for Emerging Infectious Diseases, Shimane University, Izumo, Japan
| | - Minh Xuan Bui
- Khanh Hoa Provincial Public Health Service, Nha Trang, Viet Nam
| | - Do Thai Hung
- Pasteur Institute in Nha Trang, Nha Trang, Viet Nam
| | | | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | - Lay-Myint Yoshida
- Department of Pediatric Infectious Diseases, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Hiroyuki Moriuchi
- Department of Pediatrics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan.
| | - Kouichi Morita
- Department of Virology, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan; Department of Tropical Viral Vaccine Development, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan; DEJIMA Infectious Disease Research Alliance, Nagasaki University, Nagasaki, Japan
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Le LKT, Pham TPT, Mai LTP, Nguyen QT, Tran MPN, Ho TH, Pham HH, Le SV, Hoang HN, Lai AT, Huong NT, Nguyen HD, Anh DD, Iijima M, Parashar UD, Trang NV, Tate JE. Intussusception and Other Adverse Event Surveillance after Pilot Introduction of Rotavirus Vaccine in Nam Dinh and Thua Thien Hue Provinces-Vietnam, 2017-2021. Vaccines (Basel) 2024; 12:170. [PMID: 38400153 PMCID: PMC10893515 DOI: 10.3390/vaccines12020170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/29/2024] [Accepted: 02/02/2024] [Indexed: 02/25/2024] Open
Abstract
Rotavin-M1 (POLYVAC) was licensed in Vietnam in 2012. The association of Rotavin-M1 with intussusception, a rare adverse event associated with rotavirus vaccines, and with adverse events following immunization (AEFI) have not been evaluated and monitored under conditions of routine use. From February 2017 to May 2021, we conducted a pilot introduction of Rotavin-M1 into the routine vaccination program in two provinces. Surveillance for intussusception was conducted at six sentinel hospitals. AEFI reports at 30 min and 7 days after vaccination were recorded. Among 443 children <12 months of age admitted for intussusception, most (92.3%) were children ≥ 6 months. Of the 388 children who were age-eligible to receive Rotavin-M1, 116 (29.9%) had received ≥1 dose. No intussusception cases occurred in the 1-21 days after dose 1 and one case occurred on day 21 after dose 2. Among the 45,367 children who received ≥1 dose of Rotavin-M1, 9.5% of children reported at least one AEFI after dose 1 and 7.3% after dose 2. Significantly higher AEFI rates occurred among children given Rotavin-M1 with pentavalent vaccines (Quinvaxem®, ComBE Five®) compared to Rotavin-M1 without pentavalent vaccines. There was no association between intussusception and Rotavin-M1. The vaccine was generally safe when administered alone and when co-administered with other vaccines.
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Affiliation(s)
- Ly Khanh Thi Le
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam; (L.K.T.L.); (D.D.A.)
| | - Thao Phuong Thi Pham
- Center for Research and Production of Vaccines and Biologicals, Hanoi 100000, Vietnam; (T.P.T.P.); (N.T.H.)
| | - Le Thi Phuong Mai
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam; (L.K.T.L.); (D.D.A.)
| | - Quyet Tu Nguyen
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam; (L.K.T.L.); (D.D.A.)
| | - Mai Phuong Ngoc Tran
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam; (L.K.T.L.); (D.D.A.)
| | - Thien Huu Ho
- Central Hue Hospital, Thua Thien Hue 530000, Vietnam; (T.H.H.)
| | - Hung Hoang Pham
- Central Hue Hospital, Thua Thien Hue 530000, Vietnam; (T.H.H.)
| | - Sanh Van Le
- Hue Center for Disease Control, Thua Thien Hue 530000, Vietnam
| | | | - Anh Tuan Lai
- Nam Dinh Center for Disease Control, Nam Dinh 420000, Vietnam
| | - Nguyen Thuy Huong
- Center for Research and Production of Vaccines and Biologicals, Hanoi 100000, Vietnam; (T.P.T.P.); (N.T.H.)
| | - Hien Dang Nguyen
- Center for Research and Production of Vaccines and Biologicals, Hanoi 100000, Vietnam; (T.P.T.P.); (N.T.H.)
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam; (L.K.T.L.); (D.D.A.)
| | - Makiko Iijima
- World Health Organization, Vietnam Office, Hanoi 100000, Vietnam;
| | - Umesh D. Parashar
- United States Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
| | - Nguyen Van Trang
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam; (L.K.T.L.); (D.D.A.)
| | - Jacqueline E. Tate
- United States Centers for Disease Control and Prevention, Atlanta, GA 30333, USA
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Mai CTN, Ly LTK, Doan YH, Oka T, Mai LTP, Quyet NT, Mai TNP, Thiem VD, Anh LT, Van Sanh L, Hien ND, Anh DD, Parashar UD, Tate JE, Van Trang N. Prevalence and Characterization of Gastroenteritis Viruses among Hospitalized Children during a Pilot Rotavirus Vaccine Introduction in Vietnam. Viruses 2023; 15:2164. [PMID: 38005842 PMCID: PMC10675811 DOI: 10.3390/v15112164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2023] [Revised: 10/16/2023] [Accepted: 10/24/2023] [Indexed: 11/26/2023] Open
Abstract
Rotavirus (RV), norovirus (NoV), sapovirus (SaV), and human astrovirus (HAstV) are the most common viral causes of gastroenteritis in children worldwide. From 2016 to 2021, we conducted a cross-sectional descriptive study to determine the prevalence of these viruses in hospitalized children under five years old in Nam Dinh and Thua Thien Hue provinces in Vietnam during the pilot introduction of the RV vaccine, Rotavin-M1 (POLYVAC, Hanoi, Vietnam). We randomly selected 2317/6718 (34%) acute diarrheal samples from children <5 years of age enrolled at seven sentinel hospitals from December 2016 to May 2021; this period included one year surveillance pre-vaccination from December 2016 to November 2017. An ELISA kit (Premier Rotaclone®, Meridian Bioscience, Inc., Cincinnati, OH, USA) was used to detect RV, and two multiplex real-time RT-PCR assays were used for the detection of NoV, SaV and HAstV. The prevalence of RV (single infection) was reduced from 41.6% to 22.7% (p < 0.0001) between pre- and post-vaccination periods, while the single NoV infection prevalence more than doubled from 8.8% to 21.8% (p < 0.0001). The SaV and HAstV prevalences slightly increased from 1.9% to 3.4% (p = 0.03) and 2.1% to 3.3% (p = 0.09), respectively, during the same period. Viral co-infections decreased from 7.2% to 6.0% (p = 0.24), mainly due to a reduction in RV infection. Among the genotypeable samples, NoV GII.4, SaV GI.1, and HAstV-1 were the dominant types, representing 57.3%, 32.1%, and 55.0% among the individual viral groups, respectively. As the prevalence of RV decreases following the national RV vaccine introduction in Vietnam, other viral pathogens account for a larger proportion of the remaining diarrhea burden and require continuing close monitoring.
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Affiliation(s)
- Chu Thi Ngoc Mai
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam; (C.T.N.M.); (L.T.K.L.); (T.N.P.M.); (V.D.T.)
| | - Le Thi Khanh Ly
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam; (C.T.N.M.); (L.T.K.L.); (T.N.P.M.); (V.D.T.)
| | - Yen Hai Doan
- Center for Emergency Preparedness and Response, National Institute of Infectious Diseases, Tokyo 208-0011, Japan
| | - Tomoichiro Oka
- Department of Virology II, National Institute of Infectious Diseases, Tokyo 208-0011, Japan
| | - Le Thi Phuong Mai
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam; (C.T.N.M.); (L.T.K.L.); (T.N.P.M.); (V.D.T.)
| | - Nguyen Tu Quyet
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam; (C.T.N.M.); (L.T.K.L.); (T.N.P.M.); (V.D.T.)
| | - Tran Ngoc Phuong Mai
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam; (C.T.N.M.); (L.T.K.L.); (T.N.P.M.); (V.D.T.)
| | - Vu Dinh Thiem
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam; (C.T.N.M.); (L.T.K.L.); (T.N.P.M.); (V.D.T.)
| | - Lai Tuan Anh
- Nam Dinh Center for Disease Control, Nam Dinh 420000, Vietnam
| | - Le Van Sanh
- TT Hue Center for Disease Control, Hue, Thua Thien Hue 530000, Vietnam
| | - Nguyen Dang Hien
- Center for Research and Production of Vaccines and Biologicals, Hanoi 100000, Vietnam
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam; (C.T.N.M.); (L.T.K.L.); (T.N.P.M.); (V.D.T.)
| | | | | | - Nguyen Van Trang
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam; (C.T.N.M.); (L.T.K.L.); (T.N.P.M.); (V.D.T.)
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Van Trang N, Tate JE, Phuong Mai LT, Vu TD, Quyet NT, Thi Le LK, Thi Chu MN, Ngoc Tran MP, Thi Pham TP, Nguyen HT, Hien ND, Jiang B, Yen C, Tran DN, Anh DD, Parashar UD. Impact and effectiveness of Rotavin-M1 under conditions of routine use in two provinces in Vietnam, 2016-2021, an observational and case-control study. Lancet Reg Health West Pac 2023; 37:100789. [PMID: 37693867 PMCID: PMC10485664 DOI: 10.1016/j.lanwpc.2023.100789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2023] [Revised: 04/13/2023] [Accepted: 04/27/2023] [Indexed: 09/12/2023]
Abstract
Background Half of diarrhea hospitalizations in children aged <5 years in Vietnam are due to rotavirus. Following introduction of a locally developed and licensed oral rotavirus vaccine, Rotavin-M1, into the routine immunization program in two Vietnamese provinces, Nam Dinh and TT Hue, we describe changes in rotavirus positivity among children hospitalized for diarrhea and calculate vaccine effectiveness against moderate-to-severe rotavirus hospitalizations. Methods Active rotavirus surveillance among children <5 years began in December 2016 at sentinel hospitals in districts where rotavirus vaccine was introduced in December 2017. To estimate reductions in rotavirus detection, we calculated risk ratios comparing rotavirus positivity pre- and post-vaccine introduction. We used a test-negative case-control design to calculate vaccine effectiveness. Findings From December 2016 to May 2021, 7228 children <5 years hospitalized for diarrhea were enrolled. Following introduction, Rotavin-M1 coverage was 77% (1066/1377) in Nam Dinh and 42% (203/489) in TT Hue. In Nam Dinh, rotavirus positivity among children <5 years significantly declined by 40.6% (95% CI: 34.8%-45.8%) during the three-year post-vaccine introduction period. In TT Hue, no change in rotavirus positivity was observed. Among children aged 6-23 months, a 2-dose series of Rotavin-M1 was 57% (95% CI: 39%-70%) effective against moderate-to-severe rotavirus hospitalizations. Interpretation Higher vaccination coverage in Nam Dinh than TT Hue likely contributed to substantial declines in rotavirus positivity observed in Nam Dinh following rotavirus vaccine introduction. Robust vaccine effectiveness was observed through the second year of life. National rotavirus vaccine introduction with high coverage may have substantial impact on reducing rotavirus disease burden in Vietnam. Funding Bill and Melinda Gates Foundation.
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Affiliation(s)
| | - Jacqueline E. Tate
- United States Centers for Disease Control and Prevention, Atlanta, GA, USA
| | | | - Thiem Dinh Vu
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | - Nguyen Tu Quyet
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | - Ly Khanh Thi Le
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | | | | | - Thao Phuong Thi Pham
- Center for Production and Development of Vaccines and Biologicals, Hanoi, Viet Nam
| | - Huong Thuy Nguyen
- Center for Production and Development of Vaccines and Biologicals, Hanoi, Viet Nam
| | - Nguyen Dang Hien
- Center for Production and Development of Vaccines and Biologicals, Hanoi, Viet Nam
| | - Baoming Jiang
- United States Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Catherine Yen
- United States Centers for Disease Control and Prevention, Atlanta, GA, USA
| | - Duong Nhu Tran
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | - Umesh D. Parashar
- United States Centers for Disease Control and Prevention, Atlanta, GA, USA
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Brindle HE, Bastos LS, Christley R, Contamin L, Dang LH, Anh DD, French N, Griffiths M, Nadjm B, van Doorn HR, Thai PQ, Duong TN, Choisy M. The spatio-temporal distribution of acute encephalitis syndrome and its association with climate and landcover in Vietnam. BMC Infect Dis 2023; 23:403. [PMID: 37312047 DOI: 10.1186/s12879-023-08300-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2023] [Accepted: 05/03/2023] [Indexed: 06/15/2023] Open
Abstract
BACKGROUND Acute encephalitis syndrome (AES) differs in its spatio-temporal distribution in Vietnam with the highest incidence seen during the summer months in the northern provinces. AES has multiple aetiologies, and the cause remains unknown in many cases. While vector-borne disease such as Japanese encephalitis and dengue virus and non-vector-borne diseases such as influenza and enterovirus show evidence of seasonality, associations with climate variables and the spatio-temporal distribution in Vietnam differs between these. The aim of this study was therefore to understand the spatio-temporal distribution of, and risk factors for AES in Vietnam to help hypothesise the aetiology. METHODS The number of monthly cases per province for AES, meningitis and diseases including dengue fever; influenza-like-illness (ILI); hand, foot, and mouth disease (HFMD); and Streptococcus suis were obtained from the General Department for Preventive Medicine (GDPM) from 1998-2016. Covariates including climate, normalized difference vegetation index (NDVI), elevation, the number of pigs, socio-demographics, JEV vaccination coverage and the number of hospitals were also collected. Spatio-temporal multivariable mixed-effects negative binomial Bayesian models with an outcome of the number of cases of AES, a combination of the covariates and harmonic terms to determine the magnitude of seasonality were developed. RESULTS The national monthly incidence of AES declined by 63.3% over the study period. However, incidence increased in some provinces, particularly in the Northwest region. In northern Vietnam, the incidence peaked in the summer months in contrast to the southern provinces where incidence remained relatively constant throughout the year. The incidence of meningitis, ILI and S. suis infection; temperature, relative humidity with no lag, NDVI at a lag of one month, and the number of pigs per 100,000 population were positively associated with the number of cases of AES in all models in which these covariates were included. CONCLUSIONS The positive correlation of AES with temperature and humidity suggest that a number of cases may be due to vector-borne diseases, suggesting a need to focus on vaccination campaigns. However, further surveillance and research are recommended to investigate other possible aetiologies such as S. suis or Orientia tsutsugamushi.
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Affiliation(s)
- Hannah E Brindle
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK.
- Oxford University Clinical Research Unit, Hanoi City, Vietnam.
| | - Leonardo S Bastos
- Scientific Computing Programme, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Robert Christley
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
| | - Lucie Contamin
- Institut de Recherche Pour Le Développement, Hanoi, Vietnam
| | - Le Hai Dang
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Neil French
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
| | - Michael Griffiths
- Institute of Infection, Veterinary and Ecological Sciences, University of Liverpool, Liverpool, UK
| | - Behzad Nadjm
- Oxford University Clinical Research Unit, Hanoi City, Vietnam
- MRC Unit The Gambia at the London, School of Hygiene & Tropical Medicine, Fajara, The Gambia
| | - H Rogier van Doorn
- Oxford University Clinical Research Unit, Hanoi City, Vietnam
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
| | - Pham Quang Thai
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
- School Preventive Medicine and Public Health, Hanoi Medical University, Hanoi, Vietnam
| | - Tran Nhu Duong
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Marc Choisy
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, UK
- Oxford University Clinical Research Unit, Ho Chi Minh City, Vietnam
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Ha HTA, Nguyen PTL, Hung TTM, Tuan LA, Thuy BT, Lien THM, Thai PD, Thanh NH, Bich VTN, Anh TH, Hanh NTH, Minh NT, Thanh DP, Mai SNT, The HC, Trung NV, Thu NH, Duong TN, Anh DD, Ngoc PT, Bañuls AL, Choisy M, van Doorn HR, Suzuki M, Hoang TH. Prevalence and Associated Factors of optrA-Positive- Enterococcus faecalis in Different Reservoirs around Farms in Vietnam. Antibiotics (Basel) 2023; 12:954. [PMID: 37370273 DOI: 10.3390/antibiotics12060954] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Revised: 05/15/2023] [Accepted: 05/19/2023] [Indexed: 06/29/2023] Open
Abstract
Linezolid is an antibiotic of last resort for the treatment of infections caused by Gram-positive bacteria, including vancomycin-resistant enterococci. Enterococcus faecalis, a member of enterococci, is a significant pathogen in nosocomial infections. E. faecalis resistance to linezolid is frequently related to the presence of optrA, which is often co-carried with fex, phenicol exporter genes, and erm genes encoding macrolide resistance. Therefore, the common use of antibiotics in veterinary might promote the occurrence of optrA in livestock settings. This is a cross-sectional study aiming to investigate the prevalence of optrA positive E. faecalis (OPEfs) in 6 reservoirs in farms in Ha Nam province, Vietnam, and its associated factors and to explore genetic relationships of OPEfs isolates. Among 639 collected samples, the prevalence of OPEfs was highest in flies, 46.8% (51/109), followed by chickens 37.3% (72/193), dogs 33.3% (17/51), humans 18.7% (26/139), wastewater 16.4% (11/67) and pigs 11.3%, (14/80). The total feeding area and total livestock unit of the farm were associated with the presence of OPEfs in chickens, flies, and wastewater. Among 186 OPEfs strains, 86% were resistant to linezolid. The presence of optrA was also related to the resistant phenotype against linezolid and levofloxacin of E. faecalis isolates. Close genotypic relationships identified by Pulsed Field Gel Electrophoresis between OPEfs isolates recovered from flies and other reservoirs including chickens, pigs, dogs, and wastewater suggested the role of flies in the transmission of antibiotic-resistant pathogens. These results provided warnings of linezolid resistance although it is not used in livestock.
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Affiliation(s)
- Hoang Thi An Ha
- Hanoi Medical University, Hanoi 100000, Vietnam
- Department of Microbiology, Vinh Medical University, Vinh 431000, Vietnam
| | | | - Tran Thi Mai Hung
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam
| | - Le Anh Tuan
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam
| | - Bui Thanh Thuy
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam
| | | | - Pham Duy Thai
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam
| | - Nguyen Ha Thanh
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam
| | | | | | - Ngo Thi Hong Hanh
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam
| | - Nguyen Thi Minh
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam
| | - Duy Pham Thanh
- Oxford University Clinical Research Unit, Ho Chi Minh City 700000, Vietnam
| | - Si-Nguyen T Mai
- Oxford University Clinical Research Unit, Ho Chi Minh City 700000, Vietnam
| | - Hao Chung The
- Oxford University Clinical Research Unit, Ho Chi Minh City 700000, Vietnam
| | - Nguyen Vu Trung
- Pasteur Institute in Ho Chi Minh City, Ho Chi Minh City 700000, Vietnam
| | | | - Tran Nhu Duong
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam
| | - Pham Thi Ngoc
- National Institute of Veterinary Research, Hanoi 100000, Vietnam
| | - Anne-Laure Bañuls
- MIVEGEC (IRD-CNRS-Université de Montpellier), LMI DRISA, Centre IRD, 34394 Montpellier, France
| | - Marc Choisy
- Oxford University Clinical Research Unit, Ho Chi Minh City 700000, Vietnam
- Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX1 4BH, UK
| | - H Rogier van Doorn
- Oxford University Clinical Research Unit, Hanoi 100000, Vietnam
- Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, University of Oxford, Oxford OX1 4BH, UK
| | - Masato Suzuki
- National Institute of Infectious Diseases, Tokyo 162-0052, Japan
| | - Tran Huy Hoang
- Hanoi Medical University, Hanoi 100000, Vietnam
- National Institute of Hygiene and Epidemiology, Hanoi 100000, Vietnam
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7
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Ashall J, Shah S, Biggs JR, Chang JNR, Jafari Y, Brady OJ, Mai HK, Lien LT, Do Thai H, Nguyen HAT, Anh DD, Iwasaki C, Kitamura N, Van Loock M, Herrera-Taracena G, Rasschaert F, Van Wesenbeeck L, Yoshida LM, Hafalla JCR, Hue S, Hibberd ML. A phylogenetic study of dengue virus in urban Vietnam shows long-term persistence of endemic strains. Virus Evol 2023; 9:vead012. [PMID: 36926448 PMCID: PMC10013730 DOI: 10.1093/ve/vead012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 10/31/2022] [Accepted: 02/15/2023] [Indexed: 02/17/2023] Open
Abstract
Dengue virus (DENV) causes repeated outbreaks of disease in endemic areas, with patterns of local transmission strongly influenced by seasonality, importation via human movement, immunity, and vector control efforts. An understanding of how each of these interacts to enable endemic transmission (continual circulation of local virus strains) is largely unknown. There are times of the year when no cases are reported, often for extended periods of time, perhaps wrongly implying the successful eradication of a local strain from that area. Individuals who presented at a clinic or hospital in four communes in Nha Trang, Vietnam, were initially tested for DENV antigen presence. Enrolled positive individuals then had their corresponding household members invited to participate, and those who enrolled were tested for DENV. The presence of viral nucleic acid in all samples was confirmed using quantitative polymerase chain reaction, and positive samples were then whole-genome sequenced using an amplicon and target enrichment library preparation techniques and Illumina MiSeq sequencing technology. Generated consensus genome sequences were then analysed using phylogenetic tree reconstruction to categorise sequences into clades with a common ancestor, enabling investigations of both viral clade persistence and introductions. Hypothetical introduction dates were additionally assessed using a molecular clock model that calculated the time to the most recent common ancestor (TMRCA). We obtained 511 DENV whole-genome sequences covering four serotypes and more than ten distinct viral clades. For five of these clades, we had sufficient data to show that the same viral lineage persisted for at least several months. We noted that some clades persisted longer than others during the sampling time, and by comparison with other published sequences from elsewhere in Vietnam and around the world, we saw that at least two different viral lineages were introduced into the population during the study period (April 2017-2019). Next, by inferring the TMRCA from the construction of molecular clock phylogenies, we predicted that two of the viral lineages had been present in the study population for over a decade. We observed five viral lineages co-circulating in Nha Trang from three DENV serotypes, with two likely to have remained as uninterrupted transmission chains for a decade. This suggests clade cryptic persistence in the area, even during periods of low reported incidence.
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Affiliation(s)
- James Ashall
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Sonal Shah
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Joseph R Biggs
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Jui-Ning R Chang
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Yalda Jafari
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Oliver J Brady
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK.,Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Huynh Kim Mai
- Department of Microbiology and Immunology, Pasteur Institute of Nha Trang, Xương Huân, Nha Trang, 650000, Vietnam
| | - Le Thuy Lien
- Department of Microbiology and Immunology, Pasteur Institute of Nha Trang, Xương Huân, Nha Trang, 650000, Vietnam
| | - Hung Do Thai
- Department of Microbiology and Immunology, Pasteur Institute of Nha Trang, Xương Huân, Nha Trang, 650000, Vietnam
| | - Hien Anh Thi Nguyen
- National Institute of Hygiene and Epidemiology, 1 P. Yec Xanh, Phạm Đình Hổ, Hai Bà Trưng, Hà Nội, 100000, Vietnam
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, 1 P. Yec Xanh, Phạm Đình Hổ, Hai Bà Trưng, Hà Nội, 100000, Vietnam
| | - Chihiro Iwasaki
- Paediatric Infectious Diseases Department, Institute of Tropical Medicine, Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
| | - Noriko Kitamura
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK.,Paediatric Infectious Diseases Department, Institute of Tropical Medicine, Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
| | - Marnix Van Loock
- Janssen R&D, Janssen Pharmaceutica NV, Turnhoutseweg 30, Beerse B-2340, Belgium
| | - Guillermo Herrera-Taracena
- Janssen Global Public Health, Janssen Research & Development, LLC, 800 Ridgeview Drive, Horsham, PA 19044, USA
| | - Freya Rasschaert
- Janssen R&D, Janssen Pharmaceutica NV, Turnhoutseweg 30, Beerse B-2340, Belgium
| | | | - Lay-Myint Yoshida
- Paediatric Infectious Diseases Department, Institute of Tropical Medicine, Nagasaki University, 1-12-4 Sakamoto, Nagasaki 852-8523, Japan
| | - Julius Clemence R Hafalla
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Stephane Hue
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK.,Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
| | - Martin L Hibberd
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, Keppel Street, London, WC1E 7HT, UK
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8
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Beardsley J, Chambers JM, Lam TT, Zawahir S, Le H, Nguyen TA, Walsh M, Thuy Van PT, Cam Van NT, Hoang TH, Mai Hung TT, Thai CH, Anh DD, Fox GJ. Mapping access to drug outlets in Vietnam: distribution of drug outlets and the sociodemographic characteristics of the communities they serve. Lancet Reg Health West Pac 2022; 30:100668. [PMID: 36748068 PMCID: PMC9897978 DOI: 10.1016/j.lanwpc.2022.100668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Revised: 10/23/2022] [Accepted: 11/30/2022] [Indexed: 12/31/2022]
Abstract
Background Drug outlets are a vital first point of healthcare contact in low- and middle-income countries (LMICs), but they are often poorly regulated and counter staff may be unqualified to provide advice. This introduces the risk of easy access to potentially harmful products, including unnecessary antimicrobials. Over-the-counter antimicrobial sales are a major driver of antimicrobial resistance (AMR) in LMICs. We aimed to investigate the distribution of different types of drug outlets and their association with socio-economic factors. Methods We mapped the location of drug outlets in 40 randomly selected geographic clusters, covering a population of 1.96 million people. Data including type of drug outlet, context, operating hours, chief pharmacist name and qualification, and business registration identification were collected from mandatory public signage. We describe the density of drug outlets and levels of staff qualifications in relation to population density, urban vs rural areas, and poverty indices. Findings We characterised 1972 drug outlets. In the study area, there was an average of 102 outlets/per 100,000 population, compared to the global average of 25. Predictably, population density was correlated with the density of drug outlets. We found that drug outlets were less accessible in rural vs urban areas, and for the poor. Furthermore, for these populations, degree-qualified pharmacists were less accessible and public signage frequently lacked mandatory registration information. Interpretation Drug outlets appear over-supplied in Vietnam compared to other countries. Unregistered outlets and outlets without degree-qualified pharmacists are prevalent, especially in poor and rural areas, posing a risk for inappropriate supply of antimicrobials, which may contribute to AMR, and raises questions of equitable healthcare access. Funding This study was funded by a grant from the Australian Department of Foreign Affairs and Trade.
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Affiliation(s)
- Justin Beardsley
- University of Sydney Infectious Disease Institute, Sydney, NSW, Australia,Corresponding author. University of Sydney Infectious Disease Institute, Sydney, NSW, 2006, Australia.
| | | | | | - Shukry Zawahir
- Woolcock Institute of Medical Research, Hanoi, Vietnam,Central Clinical School, The University of Sydney Faculty of Medicine and Health, Sydney, NSW, Australia
| | - Hien Le
- Woolcock Institute of Medical Research, Hanoi, Vietnam
| | | | - Michael Walsh
- Sydney School of Public Health and Sydney Institute of Infectious Diseases, University of Sydney, Australia,Prasanna School of Public Health, Manipal Academy of Higher Education, Manipal, India
| | | | | | - Tran Huy Hoang
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | - Cao Hung Thai
- Medical Service Administration, Ministry of Health, Vietnam
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Greg J. Fox
- Woolcock Institute of Medical Research, Hanoi, Vietnam,Central Clinical School, The University of Sydney Faculty of Medicine and Health, Sydney, NSW, Australia
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9
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Walker MA, Tan LM, Dang LH, Van Khang P, Ha HTT, Hung TTM, Dung HH, Anh DD, Duong TN, Hadfield T, Thai PQ, Blackburn JK. Spatiotemporal Patterns of Anthrax, Vietnam, 1990–2015. Emerg Infect Dis 2022; 28:2206-2213. [PMID: 36285873 PMCID: PMC9622238 DOI: 10.3201/eid2811.212584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Anthrax is a priority zoonosis for control in Vietnam. The geographic distribution of anthrax remains to be defined, challenging our ability to target areas for control. We analyzed human anthrax cases in Vietnam to obtain anthrax incidence at the national and provincial level. Nationally, the trendline for cases remained at ≈61 cases/year throughout the 26 years of available data, indicating control efforts are not effectively reducing disease burden over time. Most anthrax cases occurred in the Northern Midlands and Mountainous regions, and the provinces of Lai Chau, Dien Bien, Lao Cai, Ha Giang, Cao Bang, and Son La experienced some of the highest incidence rates. Based on spatial Bayes smoothed maps, every region of Vietnam experienced human anthrax cases during the study period. Clarifying the distribution of anthrax in Vietnam will enable us to better identify risk areas for improved surveillance, rapid clinical care, and livestock vaccination campaigns.
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10
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Huyen DTT, Anh DD, Trung NT, Hong DT, Thanh TT, Truong LN, Jeyaseelan V, Lopez Cavestany R, Hendley WS, Mainou BA, Mach O. Inactivated Poliovirus Vaccine Closing the Type 2 Immunity Gap in Vietnam. J Pediatric Infect Dis Soc 2022; 11:413-416. [PMID: 35801634 PMCID: PMC9520283 DOI: 10.1093/jpids/piac046] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Accepted: 05/26/2022] [Indexed: 11/13/2022]
Abstract
This was a cross-sectional community-based serological survey of polio antibodies assessing the immunogenicity of inactivated poliovirus vaccine (IPV) focusing on poliovirus serotype 2. IPV was administered to 5-month-old children. Type 2 antibody seroprevalence when measured 1 month after IPV administration was >95%. One IPV dose successfully closed the immunity gap.
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Affiliation(s)
- Dang Thi Thanh Huyen
- Expanded Program on Immunizations Department, National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Dang Duc Anh
- Expanded Program on Immunizations Department, National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Nguyen Thanh Trung
- Expanded Program on Immunizations Department, National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Duong Thi Hong
- Expanded Program on Immunizations Department, National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Tran Trung Thanh
- Expanded Program on Immunizations Department, National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | | | | | - William S Hendley
- CNA, Contracting Agency to the Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Bernardo A Mainou
- Division of Viral Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
| | - Ondrej Mach
- Corresponding Author: Ondrej Mach, MD MPH, Polio Department, World Health Organization, Appia 20, 1201 Genève, Switzerland; Telephone: +41227911863. E-mail:
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11
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Biggs JR, Sy AK, Ashall J, Santoso MS, Brady OJ, Reyes MAJ, Quinones MA, Jones-Warner W, Tandoc AO, Sucaldito NL, Mai HK, Lien LT, Thai HD, Nguyen HAT, Anh DD, Iwasaki C, Kitamura N, Van Loock M, Herrera-Taracena G, Menten J, Rasschaert F, Van Wesenbeeck L, Masyeni S, Haryanto S, Yohan B, Cutiongco-de la Paz E, Yoshida LM, Hue S, Rosario Z. Capeding M, Padilla CD, Sasmono RT, Hafalla JCR, Hibberd ML. Combining rapid diagnostic tests to estimate primary and post-primary dengue immune status at the point of care. PLoS Negl Trop Dis 2022; 16:e0010365. [PMID: 35507552 PMCID: PMC9067681 DOI: 10.1371/journal.pntd.0010365] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Accepted: 03/28/2022] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Characterising dengue virus (DENV) infection history at the point of care is challenging as it relies on intensive laboratory techniques. We investigated how combining different rapid diagnostic tests (RDTs) can be used to accurately determine the primary and post-primary DENV immune status of reporting patients during diagnosis. METHODS AND FINDINGS Serum from cross-sectional surveys of acute suspected dengue patients in Indonesia (N:200) and Vietnam (N: 1,217) were assayed using dengue laboratory assays and RDTs. Using logistic regression modelling, we determined the probability of being DENV NS1, IgM and IgG RDT positive according to corresponding laboratory viremia, IgM and IgG ELISA metrics. Laboratory test thresholds for RDT positivity/negativity were calculated using Youden's J index and were utilized to estimate the RDT outcomes in patients from the Philippines, where only data for viremia, IgM and IgG were available (N:28,326). Lastly, the probabilities of being primary or post-primary according to every outcome using all RDTs, by day of fever, were calculated. Combining NS1, IgM and IgG RDTs captured 94.6% (52/55) and 95.4% (104/109) of laboratory-confirmed primary and post-primary DENV cases, respectively, during the first 5 days of fever. Laboratory test predicted, and actual, RDT outcomes had high agreement (79.5% (159/200)). Among patients from the Philippines, different combinations of estimated RDT outcomes were indicative of post-primary and primary immune status. Overall, IgG RDT positive results were confirmatory of post-primary infections. In contrast, IgG RDT negative results were suggestive of both primary and post-primary infections on days 1-2 of fever, yet were confirmatory of primary infections on days 3-5 of fever. CONCLUSION We demonstrate how the primary and post-primary DENV immune status of reporting patients can be estimated at the point of care by combining NS1, IgM and IgG RDTs and considering the days since symptoms onset. This framework has the potential to strengthen surveillance operations and dengue prognosis, particularly in low resource settings.
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Affiliation(s)
- Joseph R. Biggs
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Ava Kristy Sy
- Department of Virology, Research Institute for Tropical Medicine, Manila, Philippines
- Dengue Study Group, Research Institute for Tropical Medicine, Manila, Philippines
| | - James Ashall
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Marsha S. Santoso
- Dengue Research Unit, Eijkman Institute for Molecular Biology, National Agency for Research and Innovation of the Republic of Indonesia, Jakarta, Indonesia
| | - Oliver J. Brady
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom
- Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Mary Anne Joy Reyes
- Department of Virology, Research Institute for Tropical Medicine, Manila, Philippines
- Dengue Study Group, Research Institute for Tropical Medicine, Manila, Philippines
| | - Mary Ann Quinones
- Department of Virology, Research Institute for Tropical Medicine, Manila, Philippines
- Dengue Study Group, Research Institute for Tropical Medicine, Manila, Philippines
| | - William Jones-Warner
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Amadou O. Tandoc
- Department of Virology, Research Institute for Tropical Medicine, Manila, Philippines
| | - Nemia L. Sucaldito
- Philippine Epidemiology Bureau, Department of Health, Manila, Philippines
| | | | - Le Thuy Lien
- Pasteur Institute of Nha Trang, Nha Trang, Vietnam
| | - Hung Do Thai
- Pasteur Institute of Nha Trang, Nha Trang, Vietnam
| | | | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Chihiro Iwasaki
- Paediatric Infectious Diseases Department, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Noriko Kitamura
- Paediatric Infectious Diseases Department, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Marnix Van Loock
- Janssen Global Public Health, Janssen Pharmaceutica NV, Beerse, Belgium
| | - Guillermo Herrera-Taracena
- Janssen Global Public Health, Janssen Research & Development, Horsham, Pennsylvania, United States of America
| | - Joris Menten
- Quantitative Sciences, Janssen Pharmaceutica NV, Beerse, Belgium
| | - Freya Rasschaert
- Janssen Global Public Health, Janssen Pharmaceutica NV, Beerse, Belgium
| | | | - Sri Masyeni
- Department of Internal Medicine, Faculty of Medicine and Health Sciences, Universitas Warmadewa, Denpasar, Bali, Indonesia
| | | | - Benediktus Yohan
- Dengue Research Unit, Eijkman Institute for Molecular Biology, National Agency for Research and Innovation of the Republic of Indonesia, Jakarta, Indonesia
| | - Eva Cutiongco-de la Paz
- Institute of Human Genetics, University of the Philippines, Manila, Philippines
- Philippine Genome Centre, University of the Philippines, Manila, Philippines
| | - Lay-Myint Yoshida
- Paediatric Infectious Diseases Department, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Stephane Hue
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, United Kingdom
- Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Maria Rosario Z. Capeding
- Dengue Study Group, Research Institute for Tropical Medicine, Manila, Philippines
- Institute of Human Genetics, University of the Philippines, Manila, Philippines
| | - Carmencita D. Padilla
- Institute of Human Genetics, University of the Philippines, Manila, Philippines
- Philippine Genome Centre, University of the Philippines, Manila, Philippines
| | - R. Tedjo Sasmono
- Dengue Research Unit, Eijkman Institute for Molecular Biology, National Agency for Research and Innovation of the Republic of Indonesia, Jakarta, Indonesia
| | - Julius Clemence R. Hafalla
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Martin L. Hibberd
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
- Institute of Human Genetics, University of the Philippines, Manila, Philippines
- Philippine Genome Centre, University of the Philippines, Manila, Philippines
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12
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Auladell M, Phuong HVM, Mai LTQ, Tseng YY, Carolan L, Wilks S, Thai PQ, Price D, Duong NT, Hang NLK, Thanh LT, Thuong NTH, Huong TTK, Diep NTN, Bich VTN, Khvorov A, Hensen L, Duong TN, Kedzierska K, Anh DD, Wertheim H, Boyd SD, Good-Jacobson KL, Smith D, Barr I, Sullivan S, van Doorn HR, Fox A. Influenza virus infection history shapes antibody responses to influenza vaccination. Nat Med 2022; 28:363-372. [PMID: 35177857 DOI: 10.1038/s41591-022-01690-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 01/10/2022] [Indexed: 02/06/2023]
Abstract
Studies of successive vaccination suggest that immunological memory against past influenza viruses may limit responses to vaccines containing current strains. The impact of memory induced by prior infection is rarely considered and is difficult to ascertain, because infections are often subclinical. This study investigated influenza vaccination among adults from the Ha Nam cohort (Vietnam), who were purposefully selected to include 72 with and 28 without documented influenza A(H3N2) infection during the preceding 9 years (Australian New Zealand Clinical Trials Registry 12621000110886). The primary outcome was the effect of prior influenza A(H3N2) infection on hemagglutinin-inhibiting antibody responses induced by a locally available influenza vaccine administered in November 2016. Baseline and postvaccination sera were titrated against 40 influenza A(H3N2) strains spanning 1968-2018. At each time point (baseline, day 14 and day 280), geometric mean antibody titers against 2008-2018 strains were higher among participants with recent infection (34 (29-40), 187 (154-227) and 86 (72-103)) than among participants without recent infection (19 (17-22), 91 (64-130) and 38 (30-49)). On days 14 and 280, mean titer rises against 2014-2018 strains were 6.1-fold (5.0- to 7.4-fold) and 2.6-fold (2.2- to 3.1-fold) for participants with recent infection versus 4.8-fold (3.5- to 6.7-fold) and 1.9-fold (1.5- to 2.3-fold) for those without. One of 72 vaccinees with recent infection versus 4 of 28 without developed symptomatic A(H3N2) infection in the season after vaccination (P = 0.021). The range of A(H3N2) viruses recognized by vaccine-induced antibodies was associated with the prior infection strain. These results suggest that recall of immunological memory induced by prior infection enhances antibody responses to inactivated influenza vaccine and is important to attain protective antibody titers.
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Affiliation(s)
- Maria Auladell
- Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | | | | | - Yeu-Yang Tseng
- WHO Collaborating Centre for Reference and Research on Influenza, Royal Melbourne Hospital, at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia.,Department of Infectious Diseases, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Louise Carolan
- WHO Collaborating Centre for Reference and Research on Influenza, Royal Melbourne Hospital, at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Sam Wilks
- Centre for Pathogen Evolution, Department of Zoology, University of Cambridge, Cambridge, UK
| | - Pham Quang Thai
- National Institute of Hygiene and Epidemiology, Ha Noi, Vietnam
| | - David Price
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, University of Melbourne, Melbourne, Victoria, Australia.,Victorian Infectious Diseases Reference Laboratory Epidemiology Unit and The Peter Doherty Institute for Infection and Immunity, University of Melbourne and Royal Melbourne Hospital, Melbourne, Victoria, Australia
| | | | | | - Le Thi Thanh
- National Institute of Hygiene and Epidemiology, Ha Noi, Vietnam
| | - Nguyen Thi Hong Thuong
- Oxford University Clinical Research Unit, Wellcome Africa Asia Programme, National Hospital of Tropical Diseases, Ha Noi, Vietnam
| | - Tran Thi Kieu Huong
- Oxford University Clinical Research Unit, Wellcome Africa Asia Programme, National Hospital of Tropical Diseases, Ha Noi, Vietnam
| | - Nguyen Thi Ngoc Diep
- Oxford University Clinical Research Unit, Wellcome Africa Asia Programme, National Hospital of Tropical Diseases, Ha Noi, Vietnam
| | - Vu Thi Ngoc Bich
- Oxford University Clinical Research Unit, Wellcome Africa Asia Programme, National Hospital of Tropical Diseases, Ha Noi, Vietnam
| | - Arseniy Khvorov
- WHO Collaborating Centre for Reference and Research on Influenza, Royal Melbourne Hospital, at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia.,Department of Infectious Diseases, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Luca Hensen
- Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Tran Nhu Duong
- National Institute of Hygiene and Epidemiology, Ha Noi, Vietnam
| | - Katherine Kedzierska
- Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Ha Noi, Vietnam
| | - Heiman Wertheim
- Oxford University Clinical Research Unit, Wellcome Africa Asia Programme, National Hospital of Tropical Diseases, Ha Noi, Vietnam.,Department of Medical Microbiology, Radboudumc Center for Infectious Diseases, Radboudumc, Nijmegen, The Netherlands
| | - Scott D Boyd
- Stanford University Medical Centre, Stanford University, Stanford, CA, USA
| | - Kim L Good-Jacobson
- Department of Biochemistry and Molecular Biology, Monash University, Clayton, Victoria, Australia.,Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Derek Smith
- Centre for Pathogen Evolution, Department of Zoology, University of Cambridge, Cambridge, UK
| | - Ian Barr
- WHO Collaborating Centre for Reference and Research on Influenza, Royal Melbourne Hospital, at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - Sheena Sullivan
- WHO Collaborating Centre for Reference and Research on Influenza, Royal Melbourne Hospital, at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia.,Department of Infectious Diseases, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia
| | - H Rogier van Doorn
- Oxford University Clinical Research Unit, Wellcome Africa Asia Programme, National Hospital of Tropical Diseases, Ha Noi, Vietnam.,Centre of Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - Annette Fox
- Department of Microbiology and Immunology, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia. .,WHO Collaborating Centre for Reference and Research on Influenza, Royal Melbourne Hospital, at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia. .,Department of Infectious Diseases, University of Melbourne, at The Peter Doherty Institute for Infection and Immunity, Melbourne, Victoria, Australia.
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13
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VAN Trang N, Prem K, Toh ZQ, Viet Ha BT, Ngoc Lan PT, Tran HP, Pham QD, VAN Khuu N, Jit M, Luu DT, Khanh Ly LET, Cao VAN, LE-Ha TD, Bright K, Garland SM, Anh DD, Mulholland K. Prevalence and Determinants of Vaginal Infection With Human Papillomavirus Among Female University Students in Vietnam. In Vivo 2022; 36:241-250. [PMID: 34972721 DOI: 10.21873/invivo.12697] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/20/2021] [Accepted: 10/01/2021] [Indexed: 11/10/2022]
Abstract
BACKGROUND/AIM Cervical cancer is the second most common malignancy among women in Vietnam, but the country is yet to introduce a national human papillomavirus (HPV) vaccine programme targeted at adolescents. We determined HPV prevalence and HPV vaccine knowledge among female university students in Vietnam. PATIENTS AND METHODS We surveyed and screened 1,491 female university students in Hanoi, Hue, and Ho Chi Minh City for their sexual behaviours, HPV knowledge and low- and high-risk HPV infection. RESULTS The prevalence of any HPV infection and any high-risk HPV infection were 4.2% (95%CI=3.3%-5.4%) and 3.4% (95%CI=2.5%-4.4%), respectively. Being sexually active [adjusted prevalence ratio (aPR): 6.22; 95%CI=3.4-11.37] and having ever been pregnant (aPR: 4.82; 95%CI=1.93-12.04) were positively associated with high-risk HPV infection. Whilst 60% of participants had heard of HPV vaccine, only 4.6% had received the vaccine. CONCLUSION The low HPV prevalence found in university students in Vietnam indicates that they can benefit from HPV vaccination, along with a well-designed HPV health promotion programme.
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Affiliation(s)
| | - Kiesha Prem
- Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, U.K
| | - Zheng Quan Toh
- Infection and Immunity, Murdoch Children's Research Institute, Parkville, Victoria, Australia.,Department of Paediatrics, The University of Melbourne, Parkville, Victoria, Australia
| | - Bui Thi Viet Ha
- Department of Microbiology, University of Science, Vietnam National University, Hanoi, Vietnam
| | - Pham Thi Ngoc Lan
- Department of Natural Science, Vietnam National University of Hue, Hue, Vietnam
| | - Hau Phuc Tran
- Pasteur Institute of Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Quang Duy Pham
- Pasteur Institute of Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Nghia VAN Khuu
- Pasteur Institute of Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Mark Jit
- Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, U.K.,School of Public Health, University of Hong Kong, Hong Kong, SAR, P.R. China.,Public Health England, Modelling and Economics Unit, London, U.K
| | - Dung Thi Luu
- National Institute for Control of Vaccines and Biologicals, Hanoi, Vietnam
| | - LE Thi Khanh Ly
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - VAN Cao
- Pasteur Institute of Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Tam-Duong LE-Ha
- Pasteur Institute of Ho Chi Minh City, Ho Chi Minh City, Vietnam
| | - Kathryn Bright
- Infection and Immunity, Murdoch Children's Research Institute, Parkville, Victoria, Australia
| | - Suzanne M Garland
- Infection and Immunity, Murdoch Children's Research Institute, Parkville, Victoria, Australia.,Centre for Women's Infectious Diseases, The Royal Women's Hospital, Parkville, Victoria, Australia.,Department of Obstetrics and Gynecology, The University of Melbourne, Parkville, Victoria, Australia
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam;
| | - Kim Mulholland
- Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, U.K.; .,Infection and Immunity, Murdoch Children's Research Institute, Parkville, Victoria, Australia.,Department of Paediatrics, The University of Melbourne, Parkville, Victoria, Australia
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14
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Hoang LH, Nga TT, Tram NT, Trang LT, Ha HTT, Hoang TH, Anh DD, Yen PB, Nguyen NT, Morita M, Kenri T, Senoh M. First report of foodborne botulism due to Clostridium botulinum type A(B) from vegetarian home-canned pate in Hanoi, Vietnam. Anaerobe 2022; 77:102514. [DOI: 10.1016/j.anaerobe.2022.102514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2021] [Revised: 01/03/2022] [Accepted: 01/05/2022] [Indexed: 11/01/2022]
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15
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Linh TD, Thu NH, Shibayama K, Suzuki M, Yoshida L, Thai PD, Anh DD, Duong TN, Trinh HS, Thom VP, Nga LTV, Phuong NTK, Thuyet BT, Walsh TR, Thanh LV, Bañuls AL, van Doorn HR, Van Anh T, Hoang TH. Expansion of KPC-producing Enterobacterales in four large hospitals in Hanoi, Vietnam. J Glob Antimicrob Resist 2021; 27:200-211. [PMID: 34607061 PMCID: PMC8692232 DOI: 10.1016/j.jgar.2021.09.007] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 08/30/2021] [Accepted: 09/14/2021] [Indexed: 11/17/2022] Open
Abstract
OBJECTIVES The incidence of carbapenem resistance among nosocomial Gram-negative bacteria in Vietnam is high and increasing, including among Enterobacterales. In this study, we assessed the presence of one of the main carbapenemase genes, blaKPC, among carbapenem-resistant Enterobacterales (CRE) from four large hospitals in Hanoi, Vietnam, between 2010 and 2015, and described their key molecular characteristics. METHODS KPC-producing Enterobacterales were detected using conventional PCR and were further analysed using S1 nuclease pulsed-field gel electrophoresis (S1-PFGE), Southern blotting and whole-genome sequencing (WGS) for sequence typing and genetic characterisation. RESULTS blaKPC genes were detected in 122 (20.4%) of 599 CRE isolates. blaKPC-carrying plasmids were diverse in size. Klebsiella pneumoniae harbouring blaKPC genes belonged to ST15 and ST11, whereas KPC-producing Escherichia coli showed more diverse sequence types including ST3580, ST448, ST709 and ST405. Genotypic relationships supported the hypothesis of circulation of a population of 'resident' resistant bacteria in one hospital through the years and of transmission among these hospitals via patient transfer. WGS results revealed co-carriage of several other antimicrobial resistance genes and three different genetic contexts of blaKPC-2. Among these, the combination of ISEcp1-blaCTX-M and ISKpn27-blaKPC-ΔISKpn6 on the same plasmid is reported for the first time. CONCLUSION We describe the dissemination of blaKPC-expressing Enterobacterales in four large hospitals in Hanoi, Vietnam, since 2010, which may have started earlier, along with their resistance patterns, sequence types, genotypic relationship, plasmid sizes and genetic context, thereby contributing to the overall picture of the antimicrobial resistance situation in Enterobacterales in Vietnam.
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Affiliation(s)
- Tran Dieu Linh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Nguyen Hoai Thu
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | - Masato Suzuki
- National Institute of Infectious Diseases, Tokyo, Japan
| | - LayMint Yoshida
- Institute of Tropical Diseases, Nagasaki University, Nagasaki, Japan
| | - Pham Duy Thai
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Tran Nhu Duong
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | | | | | | | | | - Timothy R Walsh
- Department of Medical Microbiology and Infectious Disease, Cardiff University, Cardiff, UK
| | - Le Viet Thanh
- Oxford University Clinical Research Unit, Hanoi, Vietnam; Quadram Institute Bioscience, Norwich Research Park, Norwich, Norfolk, UK
| | - Anne-Laure Bañuls
- MIVEGEC (IRD-CNRS-Université de Montpellier), Centre IRD, Montpellier, France
| | - H Rogier van Doorn
- Oxford University Clinical Research Unit, Hanoi, Vietnam; Centre for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | | | - Tran Huy Hoang
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam; Hanoi Medical University, Hanoi, Vietnam.
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16
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Huong PLT, Hien PT, Lan NTP, Tuan DM, Anh DD, Binh TQ. Clinical Patterns and Risk Factors for Pneumonia Caused by Atypical Bacteria in Vietnamese Children. Indian Pediatr 2021; 58:1056-1058. [PMID: 34390236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
OBJECTIVE To investigate clinical characteristics and risk factors for atypical community-acquired pneumonia (CAP) in children. METHODS Multiplex polymerase chain reaction and specific IgM determination were used to detect atypical bacteria in 661 hospitalized children aged 1-15 years with CAP. Clinical and epidemiological patterns were compared between typical and atypical CAP. RESULTS Children in atypical CAP group manifested significantly lower rates of wheezing, bronchial rales, and interstitial pneumonia and showed higher rates of asthma history, headache, chest pain, and lobar pneumonia . Age group, season of disease onset, asthma history, duration of symptom onset to hospital admission, and radiological findings were the significant risk factors for atypical CAP on multivariate logistic regression analysis. CONCLUSIONS The clinical characteristics and risk factors can be used to identify a child at high risk of atypical CAP.
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Affiliation(s)
| | - Pham Thu Hien
- Vietnam National Children's Hospital, Hanoi, Vietnam
| | | | - Dao Minh Tuan
- Vietnam National Children's Hospital, Hanoi, Vietnam
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Tran Quang Binh
- National Institute of Hygiene and Epidemiology, and Dinh Tien Hoang Institute of Medicine, Hanoi, Vietnam. Correspondence to: Assoc. Prof. Tran Quang Binh, Head, Laboratory of Molecular Genetics, National Institute of Hygiene and Epidemiology, 1 Yersin Street, Hanoi 100000 Vietnam.
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17
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Khanh NC, Fowlkes AL, Nghia ND, Duong TN, Tu NH, Tu TA, McFarland JW, Nguyen TTM, Ha NT, Gould PL, Thanh PN, Trang NTH, Mai VQ, Thi PN, Otsu S, Azziz-Baumgartner E, Anh DD, Iuliano AD. Burden of Influenza-Associated Respiratory Hospitalizations, Vietnam, 2014-2016. Emerg Infect Dis 2021; 27:2648-2657. [PMID: 34545793 PMCID: PMC8462305 DOI: 10.3201/eid2710.204765] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Influenza burden estimates are essential to informing prevention and control policies. To complement recent influenza vaccine production capacity in Vietnam, we used acute respiratory infection (ARI) hospitalization data, severe acute respiratory infection (SARI) surveillance data, and provincial population data from 4 provinces representing Vietnam’s major regions during 2014–2016 to calculate provincial and national influenza-associated ARI and SARI hospitalization rates. We determined the proportion of ARI admissions meeting the World Health Organization SARI case definition through medical record review. The mean influenza-associated hospitalization rates per 100,000 population were 218 (95% uncertainty interval [UI] 197–238) for ARI and 134 (95% UI 119–149) for SARI. Influenza-associated SARI hospitalization rates per 100,000 population were highest among children <5 years of age (1,123; 95% UI 946–1,301) and adults >65 years of age (207; 95% UI 186–227), underscoring the need for prevention and control measures, such as vaccination, in these at-risk populations.
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18
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Tuan LA, Prem K, Pham QD, Toh ZQ, Tran HP, Nguyen PD, Mai CTN, Ly LTK, Cao V, Le-Ha TD, Tuan NA, Jit M, Bright K, Brisson M, Nguyen TV, Garland S, Anh DD, Trang NV, Mulholland K. Anal human papillomavirus prevalence and risk factors among men who have sex with men in Vietnam. Int J Infect Dis 2021; 112:136-143. [PMID: 34517047 PMCID: PMC8627386 DOI: 10.1016/j.ijid.2021.09.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 08/24/2021] [Accepted: 09/07/2021] [Indexed: 12/28/2022] Open
Abstract
HPV infection in men having sex with men (MSM) was studied in two cities of Vietnam Prevalence of any HPV and HPV16/18 among MSM was 32.3% and 11.0%, respectively High-risk HPV infections in MSM were associated with risky sexual behaviours A targeted HPV vaccination strategy would be beneficial for MSM in Vietnam
Objectives Men who have sex with men (MSM) are at risk of human papillomavirus (HPV)-related cancers, while published data are scarce. This study determined HPV prevalence and risk factors in MSM in Vietnam to inform HPV prevention strategies in this key population. Methods A cross-sectional study of 799 MSM aged 16-50 years was conducted in Vietnam in 2017-2018. Information was collected on risk behaviours, and knowledge of HPV and anal cancer; rectal swabs were taken to detect anal HPV infection. An in-house polymerase chain reaction and Genoflow HPV array test kit were used for HPV detection and genotyping. Results The median age of the study participants was 25 years (range 18-52). Overall prevalence of any HPV and HPV16/18 infection was 32.3% and 11.0%, respectively. A higher prevalence of high-risk HPV infection to all 14 types tested was found in Ho Chi Minh City (30.9%) than in Hanoi (18.4%). High-risk HPV infection was associated with inconsistent condom use and history of engaging in sex under the influence of drugs (adjusted odds ratio (aOR), 2.27; 95% CI, 1.48-10.67), as well as having multiple sexual partners (aOR, 1.01; 95% CI, 1.00–1.02). Conclusions High-risk anal HPV infections in Vietnamese MSM were significantly associated with risky sexual behaviours. A targeted HPV vaccination strategy would have substantial benefit for MSM in Vietnam.
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Affiliation(s)
- Le Anh Tuan
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam.
| | - Kiesha Prem
- London School of Hygiene and Tropical Medicine, London, UK.
| | - Quang Duy Pham
- Pasteur Institute in Ho Chi Minh City, Ho Chi Minh City, Vietnam.
| | - Zheng Quan Toh
- Infection and Immunity, Murdoch Children's Research Institute, VIC, Australia; Department of Paediatrics, The University of Melbourne, VIC, Australia.
| | - Hau Phuc Tran
- Pasteur Institute in Ho Chi Minh City, Ho Chi Minh City, Vietnam.
| | - Phuc Duy Nguyen
- Pasteur Institute in Ho Chi Minh City, Ho Chi Minh City, Vietnam.
| | | | - Le Thi Khanh Ly
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam.
| | - Van Cao
- Pasteur Institute in Ho Chi Minh City, Ho Chi Minh City, Vietnam.
| | - Tam-Duong Le-Ha
- Pasteur Institute in Ho Chi Minh City, Ho Chi Minh City, Vietnam.
| | - Nguyen Anh Tuan
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam.
| | - Mark Jit
- London School of Hygiene and Tropical Medicine, London, UK; School of Public Health, University of Hong Kong, Hong Kong, SAR, China; Public Health England, Modelling and Economics Unit, London, UK.
| | - Kathryn Bright
- Infection and Immunity, Murdoch Children's Research Institute, VIC, Australia.
| | - Marc Brisson
- Centre de recherche du CHU de Québec, Université Laval, Québec, QC, Canada; Department of Social and Preventive Medicine, Université Laval, Québec, Canada.
| | - Thuong Vu Nguyen
- Pasteur Institute in Ho Chi Minh City, Ho Chi Minh City, Vietnam.
| | - Suzanne Garland
- Infection and Immunity, Murdoch Children's Research Institute, VIC, Australia; Centre for Women's Infectious Diseases, The Royal Women's Hospital, Melbourne, Department of Obstetrics and Gynaecology, University of Melbourne, Australia.
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam.
| | | | - Kim Mulholland
- London School of Hygiene and Tropical Medicine, London, UK; Infection and Immunity, Murdoch Children's Research Institute, VIC, Australia; Department of Paediatrics, The University of Melbourne, VIC, Australia.
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19
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Thai PQ, Rabaa MA, Luong DH, Tan DQ, Quang TD, Quach HL, Hoang Thi NA, Dinh PC, Nghia ND, Tu TA, Quang LN, Phuc TM, Chau V, Khanh NC, Anh DD, Duong TN, Thwaites G, van Doorn HR, Choisy M. The First 100 Days of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Control in Vietnam. Clin Infect Dis 2021; 72:e334-e342. [PMID: 32738143 PMCID: PMC7454342 DOI: 10.1093/cid/ciaa1130] [Citation(s) in RCA: 46] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2020] [Indexed: 12/17/2022] Open
Abstract
Background One hundred days after severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was first reported in Vietnam on 23 January, 270 cases were confirmed, with no deaths. We describe the control measures used by the government and their relationship with imported and domestically acquired case numbers, with the aim of identifying the measures associated with successful SARS-CoV-2 control. Methods Clinical and demographic data on the first 270 SARS-CoV-2 infected cases and the timing and nature of government control measures, including numbers of tests and quarantined individuals, were analyzed. Apple and Google mobility data provided proxies for population movement. Serial intervals were calculated from 33 infector-infectee pairs and used to estimate the proportion of presymptomatic transmission events and time-varying reproduction numbers. Results A national lockdown was implemented between 1 and 22 April. Around 200 000 people were quarantined and 266 122 reverse transcription polymerase chain reaction (RT-PCR) tests conducted. Population mobility decreased progressively before lockdown. In total, 60% (163/270) of cases were imported; 43% (89/208) of resolved infections remained asymptomatic for the duration of infection. The serial interval was 3.24 days, and 27.5% (95% confidence interval [CI], 15.7%-40.0%) of transmissions occurred presymptomatically. Limited transmission amounted to a maximum reproduction number of 1.15 (95% CI, .·37–2.·36). No community transmission has been detected since 15 April. Conclusions Vietnam has controlled SARS-CoV-2 spread through the early introduction of mass communication, meticulous contact tracing with strict quarantine, and international travel restrictions. The value of these interventions is supported by the high proportion of asymptomatic and imported cases, and evidence for substantial presymptomatic transmission.
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Affiliation(s)
- Pham Quang Thai
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam.,School of Preventive Medicine and Public Health, Hanoi Medical University, Hanoi, Vietnam
| | - Maia A Rabaa
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.,Oxford University Clinical Research Unit, Ho Chi Minh city, Vietnam
| | - Duong Huy Luong
- Medical Services Administration, Ministry of Health, Hanoi, Vietnam
| | - Dang Quang Tan
- General Department of Preventive Medicine, Ministry of Health, Hanoi, Vietnam
| | - Tran Dai Quang
- General Department of Preventive Medicine, Ministry of Health, Hanoi, Vietnam
| | - Ha-Linh Quach
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam.,Research School of Population Health, Australian National University, Canberra, Australia
| | - Ngoc-Anh Hoang Thi
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam.,Research School of Population Health, Australian National University, Canberra, Australia
| | - Phung Cong Dinh
- National Agency for Science and Technology Information, Ministry of Science and Technology, Hanoi, Vietnam
| | - Ngu Duy Nghia
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Tran Anh Tu
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | - Tran My Phuc
- Oxford University Clinical Research Unit, Ho Chi Minh city, Vietnam
| | - Vinh Chau
- Oxford University Clinical Research Unit, Ho Chi Minh city, Vietnam
| | | | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Tran Nhu Duong
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Guy Thwaites
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.,Oxford University Clinical Research Unit, Ho Chi Minh city, Vietnam
| | - H Rogier van Doorn
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.,Oxford University Clinical Research Unit, Ho Chi Minh city, Vietnam
| | - Marc Choisy
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.,Oxford University Clinical Research Unit, Ho Chi Minh city, Vietnam
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20
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Thai PQ, Rabaa MA, Luong DH, Tan DQ, Quang TD, Quach HL, Hoang Thi NA, Dinh PC, Nghia ND, Tu TA, Quang LN, Phuc TM, Chau V, Khanh NC, Anh DD, Duong TN, Thwaites G, van Doorn HR, Choisy M. The First 100 Days of Severe Acute Respiratory Syndrome Coronavirus 2 (SARS-CoV-2) Control in Vietnam. Clin Infect Dis 2021. [PMID: 32738143 DOI: 10.1093/cid/ciaa1130/5879764] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND One hundred days after severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) was first reported in Vietnam on 23 January, 270 cases were confirmed, with no deaths. We describe the control measures used by the government and their relationship with imported and domestically acquired case numbers, with the aim of identifying the measures associated with successful SARS-CoV-2 control. METHODS Clinical and demographic data on the first 270 SARS-CoV-2 infected cases and the timing and nature of government control measures, including numbers of tests and quarantined individuals, were analyzed. Apple and Google mobility data provided proxies for population movement. Serial intervals were calculated from 33 infector-infectee pairs and used to estimate the proportion of presymptomatic transmission events and time-varying reproduction numbers. RESULTS A national lockdown was implemented between 1 and 22 April. Around 200 000 people were quarantined and 266 122 reverse transcription polymerase chain reaction (RT-PCR) tests conducted. Population mobility decreased progressively before lockdown. In total, 60% (163/270) of cases were imported; 43% (89/208) of resolved infections remained asymptomatic for the duration of infection. The serial interval was 3.24 days, and 27.5% (95% confidence interval [CI], 15.7%-40.0%) of transmissions occurred presymptomatically. Limited transmission amounted to a maximum reproduction number of 1.15 (95% CI, .·37-2.·36). No community transmission has been detected since 15 April. CONCLUSIONS Vietnam has controlled SARS-CoV-2 spread through the early introduction of mass communication, meticulous contact tracing with strict quarantine, and international travel restrictions. The value of these interventions is supported by the high proportion of asymptomatic and imported cases, and evidence for substantial presymptomatic transmission.
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Affiliation(s)
- Pham Quang Thai
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam.,School of Preventive Medicine and Public Health, Hanoi Medical University, Hanoi, Vietnam
| | - Maia A Rabaa
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.,Oxford University Clinical Research Unit, Ho Chi Minh city, Vietnam
| | - Duong Huy Luong
- Medical Services Administration, Ministry of Health, Hanoi, Vietnam
| | - Dang Quang Tan
- General Department of Preventive Medicine, Ministry of Health, Hanoi, Vietnam
| | - Tran Dai Quang
- General Department of Preventive Medicine, Ministry of Health, Hanoi, Vietnam
| | - Ha-Linh Quach
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam.,Research School of Population Health, Australian National University, Canberra, Australia
| | - Ngoc-Anh Hoang Thi
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam.,Research School of Population Health, Australian National University, Canberra, Australia
| | - Phung Cong Dinh
- National Agency for Science and Technology Information, Ministry of Science and Technology, Hanoi, Vietnam
| | - Ngu Duy Nghia
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Tran Anh Tu
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | - Tran My Phuc
- Oxford University Clinical Research Unit, Ho Chi Minh city, Vietnam
| | - Vinh Chau
- Oxford University Clinical Research Unit, Ho Chi Minh city, Vietnam
| | | | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Tran Nhu Duong
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Guy Thwaites
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.,Oxford University Clinical Research Unit, Ho Chi Minh city, Vietnam
| | - H Rogier van Doorn
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.,Oxford University Clinical Research Unit, Ho Chi Minh city, Vietnam
| | - Marc Choisy
- Centre for Tropical Medicine and Global Health, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom.,Oxford University Clinical Research Unit, Ho Chi Minh city, Vietnam
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21
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Tran VD, Phuong Mai LT, Thu NT, Linh BK, Than PD, Quyet NT, Dung LP, Ngoc Phuong Mai T, My Hanh NT, Hai H, Duong TN, Anh DD. Seroprevalence and serovar distribution of Leptospirosis among healthy people in Vietnam: Results from a multi-center study. Clinical Epidemiology and Global Health 2021. [DOI: 10.1016/j.cegh.2021.100700] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
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22
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Althouse BM, Flasche S, Toizumi M, Nguyen HAT, Vo HM, Le MN, Hashizume M, Ariyoshi K, Anh DD, Rodgers GL, Klugman KP, Hu H, Yoshida LM. Differences in clinical severity of respiratory viral infections in hospitalized children. Sci Rep 2021; 11:5163. [PMID: 33664311 PMCID: PMC7933285 DOI: 10.1038/s41598-021-84423-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 01/12/2021] [Indexed: 11/05/2022] Open
Abstract
It is uncertain whether clinical severity of an infection varies by pathogen or by multiple infections. Using hospital-based surveillance in children, we investigate the range of clinical severity for patients singly, multiply, and not infected with a group of commonly circulating viruses in Nha Trang, Vietnam. RT-PCR was performed to detect 13 respiratory viruses in nasopharyngeal samples from enrolled patients. We apply a novel clinical severity score and examine associations with the odds of being severe and differences in raw severity scores. We find no difference in severity between 0-, 1-, and 2-concurrent infections and little differences in severity between specific viruses. We find RSV and HMPV infections to be associated with 2- and 1.5-fold increase in odds of being severe, respectively, and that infection with ADV is consistently associated with lower risk of severity. Clinically, based on the results here, if RSV or HMPV virus is suspected, PCR testing for confirmatory diagnosis and for detection of multiple coinfecting viruses would be fruitful to assess whether a patient’s disease course is going to be severe.
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Affiliation(s)
- Benjamin M Althouse
- Institute for Disease Modeling, 3150 139th Ave SE, Bellevue, WA, 98005, USA. .,University of Washington, Seattle, WA, USA. .,New Mexico State University, Las Cruces, NM, USA.
| | - Stefan Flasche
- London School of Hygiene and Tropical Medicine, London, UK, USA
| | - Michiko Toizumi
- Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | | | | | - Minh Nhat Le
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | - Koya Ariyoshi
- Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | | | - Hao Hu
- Bill & Melinda Gates Foundation, Seattle, WA, USA
| | - Lay-Myint Yoshida
- Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
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23
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Phuong HVM, Tung TS, Trang UTH, Hang NLK, Son NV, Hien PT, Thanh LT, Cuong VD, Thanh TT, Nhan NTT, Duong TN, Nghia ND, Tu TA, Choisy M, Rabaa MA, Rogier van Doorn H, Anh DD, Mai LQ. Novel Mutation of SARS-CoV-2, Vietnam, July 2020. Emerg Infect Dis 2021; 27:1519-1521. [PMID: 33647228 PMCID: PMC8084476 DOI: 10.3201/eid2705.210013] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
A cluster of severe acute respiratory syndrome coronavirus 2 infections in Danang, Vietnam, began July 25, 2020, and resulted in 551 confirmed cases and 35 deaths as of February 2021. We analyzed 26 sequences from this cluster and identified a novel shared mutation in nonstructural protein 9, suggesting a single introduction into Vietnam.
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24
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Ngwe Tun MM, Moriuchi M, Toizumi M, Luvai E, Raini S, Kitamura N, Takegata M, Nguyen HAT, Moi ML, Buerano CC, Anh DD, Yoshida LM, Morita K, Moriuchi H. Congenital Zika Virus Infection in a Birth Cohort in Vietnam, 2017-2018. Am J Trop Med Hyg 2021; 103:2059-2064. [PMID: 32815502 PMCID: PMC7646788 DOI: 10.4269/ajtmh.20-0286] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
To detect congenital ZIKV infection (CZI) in a birth cohort and among high-risk neonates in Vietnam, we collected umbilical cord blood plasma samples of newly delivered babies and peripheral plasma samples of high-risk neonates in Nha Trang, central Vietnam, between July 2017 and September 2018. Samples were subjected to serological and molecular tests. Of the 2013 newly delivered babies, 21 (1%) were positive for Zika virus (ZIKV) IgM and 1,599 (79%) for Flavivirus IgG. Among the 21 ZIKV IgM-positives, 11 were confirmed to have CZI because their plasma samples had anti-ZIKV neutralization titers ≥ 4 times higher than those against dengue virus (DENV)-1 to 4 and Japanese encephalitis virus (JEV) and were tested for the ZIKV RNA positive by real-time reverse transcription–PCR. Therefore, the incidence of CZI in our birth cohort was approximately 0.5%. Of the 150 high-risk neonates, three (2%) and 95 (63%) were positive for ZIKV IgM and Flavivirus IgG antibodies, respectively. None of the three ZIKV IgM-positives had ≥ 4 times higher anti-ZIKV neutralization titers than those against DENV-1 to 4 and JEV, and were therefore considered as probable CZI. Our results indicate that CZI is not rare in Vietnam. Although those with confirmed CZI did not show apparent symptoms suspected of congenital Zika syndrome at birth, detailed examinations and follow-up studies are needed to clarify the CZI impact in Vietnam. This is the first report of CZI cases in a birth cohort in Asia.
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Affiliation(s)
- Mya Myat Ngwe Tun
- Department of Virology, Institute of Tropical Medicine and Leading Program, Nagasaki University, Nagasaki, Japan
| | - Masako Moriuchi
- Department of Pediatrics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
| | - Michiko Toizumi
- Department of Pediatric Infectious Diseases, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Elizabeth Luvai
- Department of Virology, Institute of Tropical Medicine and Leading Program, Nagasaki University, Nagasaki, Japan
| | - Sandra Raini
- Department of Virology, Institute of Tropical Medicine and Leading Program, Nagasaki University, Nagasaki, Japan
| | - Noriko Kitamura
- Department of Pediatric Infectious Diseases, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Mizuki Takegata
- Department of Pediatric Infectious Diseases, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | | | - Meng Ling Moi
- Department of Virology, Institute of Tropical Medicine and Leading Program, Nagasaki University, Nagasaki, Japan
| | - Corazon C Buerano
- Research and Biotechnology, St. Luke's Medical Center, Quezon City, Philippines
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Lay-Myint Yoshida
- Department of Pediatric Infectious Diseases, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Kouichi Morita
- Department of Virology, Institute of Tropical Medicine and Leading Program, Nagasaki University, Nagasaki, Japan
| | - Hiroyuki Moriuchi
- Department of Pediatrics, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki, Japan
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25
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Trung DQ, Quang NV, Tran MT, Du NV, Tu N, Hung ND, Viet DX, Anh DD, Huy PT. Single-composition Al 3+-singly doped ZnO phosphors for UV-pumped warm white light-emitting diode applications. Dalton Trans 2021; 50:9037-9050. [PMID: 34160493 DOI: 10.1039/d1dt00971k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The development of full-visible-spectrum phosphors is essential for next-generation light-emitting devices with better light quality. Herein, we report on a novel broad-band-emitting phosphor based on single-composition Al-doped ZnO phosphors. Under the UV excitation of 325 nm, the ZnO : Al phosphor exhibits a full spectrum emission in the visible wavelength range from 400 to 800 nm with a CIE chromaticity coordinate of (0.42, 0.48), a quantum efficiency of 43%, a color rendering index (CRI) of 74, a correlated color temperature (CCT) value of 3873 K and an activation energy of 0.22 eV. A prototype of a UV-pumped warm WLED with a high CRI of 87 and a CCT of 4067 K has been achieved by using only this broad-band-emitting Al3+-doped ZnO phosphor. The obtained results indicate that the single-composition Al3+-singly doped warm white emitting phosphor is a promising candidate for UV-pump warm white light-emitting diodes.
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Affiliation(s)
- D Q Trung
- Phenikaa Institute for Advanced Study (PIAS), Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam. and Phenikaa Research and Technology Institute (PRATI), Phenikaa University, 167 Hoang Ngan, Hanoi 10000, Vietnam and Faculty of Fundamental Sciences, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam
| | - N V Quang
- Faculty of Materials Science, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam and Department of Chemistry, Hanoi Pedagogical University 2, Phuc Yen, Vinh Phuc, Vietnam
| | - M T Tran
- Phenikaa Research and Technology Institute (PRATI), Phenikaa University, 167 Hoang Ngan, Hanoi 10000, Vietnam and Faculty of Materials Science, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam
| | - N V Du
- Phenikaa Research and Technology Institute (PRATI), Phenikaa University, 167 Hoang Ngan, Hanoi 10000, Vietnam and Faculty of Materials Science, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam
| | - N Tu
- Phenikaa Institute for Advanced Study (PIAS), Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam. and Phenikaa Research and Technology Institute (PRATI), Phenikaa University, 167 Hoang Ngan, Hanoi 10000, Vietnam and Faculty of Fundamental Sciences, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam
| | - N D Hung
- Advanced Institute of Science and Technology (AIST), Hanoi University of Science and Technology (HUST), N0 01 Dai Co Viet, Hanoi, Vietnam
| | - Dao Xuan Viet
- Advanced Institute of Science and Technology (AIST), Hanoi University of Science and Technology (HUST), N0 01 Dai Co Viet, Hanoi, Vietnam
| | - D D Anh
- Faculty of Materials Science, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam
| | - P T Huy
- Phenikaa Research and Technology Institute (PRATI), Phenikaa University, 167 Hoang Ngan, Hanoi 10000, Vietnam and Faculty of Materials Science, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam
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26
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Hiraoka T, Cuong NC, Hamaguchi S, Kikuchi M, Katoh S, Anh LK, Anh NTH, Anh DD, Smith C, Maruyama H, Yoshida LM, Cuong DD, Thuy PT, Ariyoshi K. Meningitis patients with Angiostrongylus cantonensis may present without eosinophilia in the cerebrospinal fluid in northern Vietnam. PLoS Negl Trop Dis 2020; 14:e0008937. [PMID: 33351806 PMCID: PMC7810332 DOI: 10.1371/journal.pntd.0008937] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2019] [Revised: 01/15/2021] [Accepted: 10/30/2020] [Indexed: 11/23/2022] Open
Abstract
Background Eosinophilic meningitis (EM) is a rare clinical syndrome caused by both infectious and noninfectious diseases. In tropical pacific countries, Angiostrongylus cantonensis is the most common cause. However, the EM definition varies in the literature, and its relation to parasitic meningitis (PM) remains unclear. Methodology/Principal findings Adult and adolescent patients of 13 years old or above with suspected central nervous system (CNS) infections with abnormal CSF findings were prospectively enrolled at a tertiary referral hospital in Hanoi, Vietnam from June 2012 to May 2014. Patients with EM or suspected PM (EM/PM) were defined by the presence of either ≥10% eosinophils or an absolute eosinophil cell counts of ≥10/mm3 in the CSF or blood eosinophilia (>16% of WBCs) without CSF eosinophils. In total 679 patients were enrolled: 7 (1.03%) had ≥10% CSF eosinophilia, 20 (2.95%) had ≥10/mm3 CSF eosinophilia, and 7 (1.03%) had >16% blood eosinophilia. The patients with ≥10% CSF eosinophilia were significantly younger (p = 0.017), had a lower body temperature (p = 0.036) than patients with ≥10/mm3 CSF eosinophilia among whom bacterial pathogens were detected in 72.2% (13/18) of those who were tested by culture and/or PCR. In contrast, the characteristics of the patients with >16% blood eosinophilia resembled those of patients with ≥10% CSF eosinophilia. We further conducted serological tests and real-time PCR to identify A. cantonensis. Serology or real-time PCR was positive in 3 (42.8%) patients with ≥10% CSF eosinophilia and 6 (85.7%) patients with >16% blood eosinophilia without CSF eosinophils but none of patients with ≥10/mm3 CSF eosinophilia. Conclusions The etiology of PM in northern Vietnam is A. cantonensis. The eosinophil percentage is a more reliable predictor of parasitic EM than absolute eosinophil count in the CSF. Patients with PM may present with a high percentage of eosinophils in the peripheral blood but not in the CSF. Eosinophilic meningitis (EM) is a rare meningitis accompanied by eosinophils in the CSF and caused by multiple etiologies. Angiostrongylus cantonensis, which is a rat lungworm parasite, is the most common cause in tropical Asia. Previous papers have defined EM as CSF eosinophils ≥10% or CSF eosinophils ≥10/mm3. However, the relationship of EM to parasitic meningitis (PM) remains unclear. This prospective study enrolled 679 patients with suspected CNS infection who were admitted to a tertiary referral hospital in Hanoi, Vietnam from June 2012 to May 2014. The characteristics of patients with ≥10% CSF eosinophilia resembled those of patients with >16% blood eosinophilia without CSF eosinophils, whereas those of patients with ≥10/mm3 CSF eosinophilia were comparable with those of patients with typical bacterial meningitis. Serology or real-time PCR for A. cantonensis was positive in 3 out of 7 patients with ≥10% CSF eosinophilia and 6 out of 7 patients with > 16% blood eosinophilia without CSF eosinophils but none of patients with ≥10/mm3 CSF eosinophilia. The percentage, in contrast to the absolute eosinophil count in CSF, is reliable for predicting parasitic EM. Patients with PM may present with eosinophilia in the peripheral blood but not in the CSF.
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Affiliation(s)
- Tomoko Hiraoka
- Department of Clinical Medicine, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Department of Clinical Tropical Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
| | - Ngo Chi Cuong
- Department of Clinical Tropical Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Department of Infectious Diseases, Bach Mai Hospital, Hanoi, Vietnam
| | - Sugihiro Hamaguchi
- Department of General Internal Medicine, Fukushima Medical University, Fukushima, Japan
| | - Mihoko Kikuchi
- Department of Immunogenetics, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Shungo Katoh
- Department of Clinical Medicine, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Department of Clinical Tropical Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Department of General Internal Medicine, Nagasaki Rosai Hospital, Nagasaki, Japan
| | - Le Kim Anh
- Vietnam Research Station, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Hanoi, Vietnam
| | | | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Chris Smith
- Department of Global Health, School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan
- Department of Clinical Research, London School of Hygiene and Tropical Medicine (LSHTM), London, United Kingdom
| | - Haruhiko Maruyama
- Department of Infectious Diseases, Division of Parasitology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Lay-Myint Yoshida
- Department of Clinical Tropical Medicine, Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Department of Pediatric Infectious Diseases, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Do Duy Cuong
- Department of Infectious Diseases, Bach Mai Hospital, Hanoi, Vietnam
| | - Pham Thanh Thuy
- Department of Infectious Diseases, Bach Mai Hospital, Hanoi, Vietnam
- Infection Prevention and Control, The Partnership for Health Advancement in Vietnam (HAIVN), Hanoi, Vietnam
| | - Koya Ariyoshi
- Department of Clinical Medicine, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Department of Global Health, School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan
- * E-mail:
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27
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Biggs JR, Sy AK, Brady OJ, Kucharski AJ, Funk S, Reyes MAJ, Quinones MA, Jones-Warner W, Tu YH, Avelino FL, Sucaldito NL, Mai HK, Lien LT, Do Thai H, Nguyen HAT, Anh DD, Iwasaki C, Kitamura N, Yoshida LM, Tandoc AO, la Paz ECD, Capeding MRZ, Padilla CD, Hafalla JCR, Hibberd ML. A serological framework to investigate acute primary and post-primary dengue cases reporting across the Philippines. BMC Med 2020; 18:364. [PMID: 33243267 PMCID: PMC7694902 DOI: 10.1186/s12916-020-01833-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 10/29/2020] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND In dengue-endemic countries, targeting limited control interventions to populations at risk of severe disease could enable increased efficiency. Individuals who have had their first (primary) dengue infection are at risk of developing more severe secondary disease, thus could be targeted for disease prevention. Currently, there is no reliable algorithm for determining primary and post-primary (infection with more than one flavivirus) status from a single serum sample. In this study, we developed and validated an immune status algorithm using single acute serum samples from reporting patients and investigated dengue immuno-epidemiological patterns across the Philippines. METHODS During 2015/2016, a cross-sectional sample of 10,137 dengue case reports provided serum for molecular (anti-DENV PCR) and serological (anti-DENV IgM/G capture ELISA) assay. Using mixture modelling, we re-assessed IgM/G seroprevalence and estimated functional, disease day-specific, IgG:IgM ratios that categorised the reporting population as negative, historical, primary and post-primary for dengue. We validated our algorithm against WHO gold standard criteria and investigated cross-reactivity with Zika by assaying a random subset for anti-ZIKV IgM and IgG. Lastly, using our algorithm, we explored immuno-epidemiological patterns of dengue across the Philippines. RESULTS Our modelled IgM and IgG seroprevalence thresholds were lower than kit-provided thresholds. Individuals anti-DENV PCR+ or IgM+ were classified as active dengue infections (83.1%, 6998/8425). IgG- and IgG+ active dengue infections on disease days 1 and 2 were categorised as primary and post-primary, respectively, while those on disease days 3 to 5 with IgG:IgM ratios below and above 0.45 were classified as primary and post-primary, respectively. A significant proportion of post-primary dengue infections had elevated anti-ZIKV IgG inferring previous Zika exposure. Our algorithm achieved 90.5% serological agreement with WHO standard practice. Post-primary dengue infections were more likely to be older and present with severe symptoms. Finally, we identified a spatio-temporal cluster of primary dengue case reporting in northern Luzon during 2016. CONCLUSIONS Our dengue immune status algorithm can equip surveillance operations with the means to target dengue control efforts. The algorithm accurately identified primary dengue infections who are at risk of future severe disease.
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Affiliation(s)
- Joseph R Biggs
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK.
| | - Ava Kristy Sy
- Department of Virology, Research Institute for Tropical Medicine, Manila, Philippines.,Dengue Study Group, Research Institute for Tropical Medicine, Manila, Philippines
| | - Oliver J Brady
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK.,Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene and Tropical Medicine, London, UK
| | - Adam J Kucharski
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK.,Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene and Tropical Medicine, London, UK
| | - Sebastian Funk
- Department of Infectious Disease Epidemiology, Faculty of Epidemiology and Population Health, London School of Hygiene and Tropical Medicine, London, UK.,Centre for the Mathematical Modelling of Infectious Diseases, London School of Hygiene and Tropical Medicine, London, UK
| | - Mary Anne Joy Reyes
- Department of Virology, Research Institute for Tropical Medicine, Manila, Philippines.,Dengue Study Group, Research Institute for Tropical Medicine, Manila, Philippines
| | - Mary Ann Quinones
- Department of Virology, Research Institute for Tropical Medicine, Manila, Philippines.,Dengue Study Group, Research Institute for Tropical Medicine, Manila, Philippines
| | - William Jones-Warner
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
| | - Yun-Hung Tu
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
| | - Ferchito L Avelino
- Philippine Epidemiology Bureau, Department of Health, Manila, Philippines
| | - Nemia L Sucaldito
- Philippine Epidemiology Bureau, Department of Health, Manila, Philippines
| | | | - Le Thuy Lien
- Pasteur Institute of Nha Trang, Nha Trang, Vietnam
| | - Hung Do Thai
- Pasteur Institute of Nha Trang, Nha Trang, Vietnam
| | | | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Chihiro Iwasaki
- Paediatric Infectious Diseases Department, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Noriko Kitamura
- Paediatric Infectious Diseases Department, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Lay-Myint Yoshida
- Paediatric Infectious Diseases Department, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Amado O Tandoc
- Department of Virology, Research Institute for Tropical Medicine, Manila, Philippines
| | - Eva Cutiongco-de la Paz
- Institute of Human Genetics, National Institute of Health, University of the Philippines, Manila, Philippines.,Philippine Genome Centre, University of the Philippines, Manila, Philippines
| | - Maria Rosario Z Capeding
- Dengue Study Group, Research Institute for Tropical Medicine, Manila, Philippines.,Institute of Human Genetics, National Institute of Health, University of the Philippines, Manila, Philippines
| | - Carmencita D Padilla
- Institute of Human Genetics, National Institute of Health, University of the Philippines, Manila, Philippines.,Philippine Genome Centre, University of the Philippines, Manila, Philippines
| | - Julius Clemence R Hafalla
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK
| | - Martin L Hibberd
- Department of Infection Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, UK.,Institute of Human Genetics, National Institute of Health, University of the Philippines, Manila, Philippines.,Philippine Genome Centre, University of the Philippines, Manila, Philippines
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28
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Khanh NC, Thai PQ, Quach HL, Thi NAH, Dinh PC, Duong TN, Mai LTQ, Nghia ND, Tu TA, Quang LN, Quang TD, Nguyen TT, Vogt F, Anh DD. Transmission of SARS-CoV 2 During Long-Haul Flight. Emerg Infect Dis 2020; 26:2617-2624. [PMID: 32946369 PMCID: PMC7588538 DOI: 10.3201/eid2611.203299] [Citation(s) in RCA: 119] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
To assess the role of in-flight transmission of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2), we investigated a cluster of cases among passengers on a 10-hour commercial flight. Affected persons were passengers, crew, and their close contacts. We traced 217 passengers and crew to their final destinations and interviewed, tested, and quarantined them. Among the 16 persons in whom SARS-CoV-2 infection was detected, 12 (75%) were passengers seated in business class along with the only symptomatic person (attack rate 62%). Seating proximity was strongly associated with increased infection risk (risk ratio 7.3, 95% CI 1.2-46.2). We found no strong evidence supporting alternative transmission scenarios. In-flight transmission that probably originated from 1 symptomatic passenger caused a large cluster of cases during a long flight. Guidelines for preventing SARS-CoV-2 infection among air passengers should consider individual passengers' risk for infection, the number of passengers traveling, and flight duration.
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29
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Hoa LNM, Sullivan SG, Mai LQ, Khvorov A, Phuong HVM, Hang NLK, Thai PQ, Thanh LT, Carolan L, Anh DD, Duong TN, Bryant JE, van Doorn HR, Wertheim HFL, Horby P, Fox A. Influenza A(H1N1)pdm09 but not A(H3N2) virus infection induces durable sero-protection: results from the Ha Nam Cohort. J Infect Dis 2020; 226:59-69. [PMID: 32484513 PMCID: PMC9373157 DOI: 10.1093/infdis/jiaa293] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 05/25/2020] [Indexed: 12/02/2022] Open
Abstract
Background The extent to which influenza recurrence depends upon waning immunity from prior infection is undefined. We used antibody titers of Ha-Nam cohort participants to estimate protection curves and decay trajectories. Methods Households (270) participated in influenza-like–illness (ILI) surveillance and provided blood at intervals spanning laboratory–confirmed virus transmission. Sera were tested in hemagglutination inhibition assay. Infection was defined as influenza virus-positive ILI and/or seroconversion. Median protective titers were estimated using scaled-logistic regression to model pretransmission titer against infection status in that season, limiting analysis to households with infection(s). Titers were modelled against month since infection using mixed-effects linear regression to estimate decay and when titers fell below protection thresholds. Results From December 2008–2012, 295 and 314 participants were infected with H1N1pdm09-like and A/Perth/16/09-like (H3N2Pe09) viruses, respectively. The proportion protected rose more steeply with titer for H1N1pdm09 than for H3N2Pe09, and estimated 50% protection titers were 19.6 and 37.3, respectively. Postinfection titers started higher against H3N2Pe09 but decayed more steeply than against H1N1pdm09. Seroprotection was estimated to be sustained against H1N1pdm09 but to wane by 8-months for H3N2Pe09. Conclusions Estimates indicate that infection induces durable seroprotection against H1N1pdm09 but not H3N2Pe09, which could in part account for the younger age of A(H1N1) versus A(H3N2) cases.
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Affiliation(s)
- Le Nguyen Minh Hoa
- Oxford University Clinical Research Unit and Wellcome Trust Major Overseas Programme, Hanoi, Viet Nam
| | - Sheena G Sullivan
- The WHO Collaborating Centre for Reference and Research on Influenza, The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia.,Doherty Department, The University of Melbourne, The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia.,Fielding School of Public Health, University of California, Los Angeles, USA
| | - Le Quynh Mai
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | - Arseniy Khvorov
- Doherty Department, The University of Melbourne, The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | | | | | - Pham Quang Thai
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | - Le Thi Thanh
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | - Louise Carolan
- The WHO Collaborating Centre for Reference and Research on Influenza, The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | - Tran Nhu Duong
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | - Juliet E Bryant
- Oxford University Clinical Research Unit and Wellcome Trust Major Overseas Programme, Hanoi, Viet Nam.,Center for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - H Rogier van Doorn
- Oxford University Clinical Research Unit and Wellcome Trust Major Overseas Programme, Hanoi, Viet Nam.,Center for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - Heiman F L Wertheim
- Oxford University Clinical Research Unit and Wellcome Trust Major Overseas Programme, Hanoi, Viet Nam.,Department of Medical Microbiology, Radboudumc, Nijmegen, Netherlands
| | - Peter Horby
- Oxford University Clinical Research Unit and Wellcome Trust Major Overseas Programme, Hanoi, Viet Nam.,Center for Tropical Medicine and Global Health, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK
| | - Annette Fox
- Oxford University Clinical Research Unit and Wellcome Trust Major Overseas Programme, Hanoi, Viet Nam.,The WHO Collaborating Centre for Reference and Research on Influenza, The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia.,Department of Microbiology and Immunology, The University of Melbourne, The Peter Doherty Institute for Infection and Immunity, Melbourne, VIC, Australia
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30
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Burnett E, Kabir F, Van Trang N, Rayamajhi A, Satter SM, Liu J, Yousafzai MT, Anh DD, Basnet AT, Flora MS, Houpt E, Qazi SH, Canh TM, Rayamajhi AK, Saha BK, Saddal NS, Muneer S, Hung PH, Islam T, Ali SA, Tate JE, Yen C, Parashar UD. Infectious Etiologies of Intussusception Among Children <2 Years Old in 4 Asian Countries. J Infect Dis 2020; 221:1499-1505. [PMID: 31754717 PMCID: PMC7371463 DOI: 10.1093/infdis/jiz621] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2019] [Accepted: 11/20/2019] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND The etiology of intussusception, the leading cause of bowel obstruction in infants, is unknown in most cases. Adenovirus has been associated with intussusception and slightly increased risk of intussusception with rotavirus vaccination has been found. We conducted a case-control study among children <2 years old in Bangladesh, Nepal, Pakistan, and Vietnam to evaluate infectious etiologies of intussusception before rotavirus vaccine introduction. METHODS From 2015 to 2017, we enrolled 1-to-1 matched intussusception cases and hospital controls; 249 pairs were included. Stool specimens were tested for 37 infectious agents using TaqMan Array technology. We used conditional logistic regression to estimate odds ratio (OR) and 95% confidence interval (CI) of each pathogen associated with intussusception in a pooled analysis and quantitative subanalyses. RESULTS Adenovirus (OR, 2.67; 95% CI, 1.75-4.36) and human herpes virus 6 (OR, 3.50; 95% CI, 1.15-10.63) were detected more frequently in cases than controls. Adenovirus C detection <20 quantification cycles was associated with intussusception (OR, 18.59; 95% CI, 2.45-140.89). Wild-type rotavirus was not associated with intussusception (OR, 1.07; 95% CI, 0.52-2.22). CONCLUSIONS In this comprehensive evaluation, adenovirus and HHV-6 were associated with intussusception. Future research is needed to better understand mechanisms leading to intussusception, particularly after rotavirus vaccination.
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Affiliation(s)
- Eleanor Burnett
- Division of Viral Diseases, Centers for Disease Control and Prevention, Atlanta, USA
| | - Furqan Kabir
- Dept. of Pediatrics and Child Health, Aga Khan University Karachi, Pakistan
| | | | - Ajit Rayamajhi
- Janak Medical and Research Center, Balaju, Kathmandu, Nepal
- Kanti Children’s Hospital, Maharajgunj, Kathmandu, Nepal
| | | | - Jie Liu
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, USA
| | | | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | - Meerjady S. Flora
- Institute of Epidemiology, Disease Control and Research (IEDCR), Dhaka, Bangladesh
| | - Eric Houpt
- Division of Infectious Diseases and International Health, University of Virginia, Charlottesville, USA
| | - Saqib Hamid Qazi
- Dept. of Pediatrics and Child Health, Aga Khan University Karachi, Pakistan
| | | | | | - Bablu K Saha
- Rangpur Medical College Hospital, Rangpur, Bangladesh
| | | | - Sehrish Muneer
- Dept. of Pediatrics and Child Health, Aga Khan University Karachi, Pakistan
| | | | - Towhidul Islam
- Sher E Bangla Medical College Hospital, Barisal, Bangladesh
| | - Syed Asad Ali
- Dept. of Pediatrics and Child Health, Aga Khan University Karachi, Pakistan
| | - Jacqueline E. Tate
- Division of Viral Diseases, Centers for Disease Control and Prevention, Atlanta, USA
| | - Catherine Yen
- Division of Viral Diseases, Centers for Disease Control and Prevention, Atlanta, USA
| | - Umesh D. Parashar
- Division of Viral Diseases, Centers for Disease Control and Prevention, Atlanta, USA
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Pare G, Neupane B, Eskandarian S, Harris E, Halstead S, Gresh L, Kuan G, Balmaseda A, Villar L, Rojas E, Osorio JE, Anh DD, De Silva AD, Premawansa S, Premawansa G, Wijewickrama A, Lorenzana I, Parham L, Rodriguez C, Fernandez-Salas I, Sanchez-Casas R, Diaz-Gonzalez EE, Saw Aye K, May WL, Thein M, Bucardo F, Reyes Y, Blandon P, Hirayama K, Weiss L, Singh P, Newton J, Loeb M. Genetic risk for dengue hemorrhagic fever and dengue fever in multiple ancestries. EBioMedicine 2020; 51:102584. [PMID: 31901861 PMCID: PMC6940652 DOI: 10.1016/j.ebiom.2019.11.045] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 10/28/2019] [Accepted: 11/26/2019] [Indexed: 01/31/2023] Open
Abstract
Background Genetic risk factors for dengue hemorrhagic fever/dengue shock syndrome (DHF/DSS) and dengue fever (DF) are limited, in particular there are sparse data on genetic risk across diverse populations. Methods We conducted a genome-wide association study (GWAS) in a derivation and validation sample of 7, 460 participants of Latin American, South Asian, and South East Asian ancestries. We then developed a weighted polygenic risk score (PRS) for each participant in each of the validation cohorts of the three ancestries to predict the risk of DHF/DSS compared to DF, DHF/DSS compared to controls, and, DF compared to controls. Findings The risk of DHF/DSS was significantly increased, odds ratio [OR] 1.84 (95%CI 1.47 to 2.31) (195 SNPs), compared to DF, fourth PRS quartile versus first quartile, in the validation cohort. The risk of DHF/DSS compared to controls was increased (OR=3.94; 95% CI 2.84 to 5.45) (278 SNPs), as was the risk of DF compared to controls (OR=1.97; 95%CI 1.63 to 2.39) (251 SNPs). Risk increased in a dose-dependent manner with increase in quartiles of PRS across comparisons. Significant associations persisted for PRS built within ancestries and applied to the same or different ancestries as well as for PRS built for one outcome (DHF/DSS or DF) and applied to the other. Interpretation There is a strong genetic effect that predisposes to risk of DHF/DSS and DF. The genetic risk for DHF/DSS is higher than that for DF when compared to controls, and this effect persists across multiple ancestries.
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Affiliation(s)
- Guillaume Pare
- Department of Pathology and Molecular Medicine, McMaster University, Ontario L8N 3Z5, Canada; Department of Health Research, Methods, Evidence, and Impact, Canada
| | - Binod Neupane
- Department of Pathology and Molecular Medicine, McMaster University, Ontario L8N 3Z5, Canada
| | - Sasha Eskandarian
- Department of Pathology and Molecular Medicine, McMaster University, Ontario L8N 3Z5, Canada
| | - Eva Harris
- Division of Infectious Diseases and Vaccinology, School of Public Health, University of California, Berkeley, CA, United States
| | - Scott Halstead
- Department of Preventive Medicine and Biometrics, Uniformed University of the Health Sciences, Bethesda, MD, United States
| | - Lionel Gresh
- Sustainable Sciences Institute, Managua, Nicaragua
| | - Guillermina Kuan
- Health Center Sócrates Flores Vivas, Ministry of Health, Managua, Nicaragua
| | - Angel Balmaseda
- Sustainable Sciences Institute, Managua, Nicaragua; Laboratorio Nacional de Virología, Centro Nacional de Diagnóstico y Referencia, Ministry of Health, Managua, Nicaragua
| | - Luis Villar
- Clinical Epidemiology Unit, Universidad Industrial de Santander, Bucaramanga, Colombia
| | - Elsa Rojas
- Centro de Atención y Diagnóstico de Enfermedades Infecciosas, Bucaramanga, Colombia
| | | | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | - Sunil Premawansa
- Department of Zoology and Environmental Sciences, University of Colombo, Sri Lanka
| | | | | | - Ivette Lorenzana
- Department of National Autonomous University of Honduras, Tegucigalpa, Honduras
| | - Leda Parham
- Department of National Autonomous University of Honduras, Tegucigalpa, Honduras
| | - Cynthia Rodriguez
- Department of National Autonomous University of Honduras, Tegucigalpa, Honduras
| | | | | | | | | | - Win Lai May
- Medical Research, Ministry of Health, Myanmar
| | - Min Thein
- Medical Research, Ministry of Health, Myanmar
| | - Filemon Bucardo
- The Faculty of Medical Sciences at the National Autonomous University of León, Nicaragua
| | - Yaoska Reyes
- The Faculty of Medical Sciences at the National Autonomous University of León, Nicaragua
| | - Patricia Blandon
- The Faculty of Medical Sciences at the National Autonomous University of León, Nicaragua
| | - Kenji Hirayama
- Department of Immunogenetics, Institute of Tropical Medicine, Nagasaki University, Nagaski, Japan
| | - Lan Weiss
- Department of Immunogenetics, Institute of Tropical Medicine, Nagasaki University, Nagaski, Japan; Department of Immunology and Microbiology, Pasteur Institute, Ho Chi Minh City, Vietnam
| | - Pardeep Singh
- Department of Pathology and Molecular Medicine, McMaster University, Ontario L8N 3Z5, Canada
| | - Jennifer Newton
- Department of Pathology and Molecular Medicine, McMaster University, Ontario L8N 3Z5, Canada
| | - Mark Loeb
- Department of Pathology and Molecular Medicine, McMaster University, Ontario L8N 3Z5, Canada; Department of Health Research, Methods, Evidence, and Impact, Canada; Institute for Infectious Diseases Research, McMaster University Hamilton, Canada.
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Anh DD, Choisy M, Clapham HE, Cuong HQ, Dung VTV, Duong TN, Hang NLK, Ha HTT, Hien NT, Hoa TTN, Hung TTM, Huong VTL, Huyen DTT, Khanh NC, Lewycka SO, Linley E, Mai LTQ, Nadjm B, Nghia ND, Pebody R, Phuong HVM, Tan LM, Van Tan L, Thai PQ, Thanh LV, Le Thanh NT, Thuy NTT, Thuong NT, Thanh LT, Thao NTT, Tuan NA, Uyen PTN, Rogier van Doorn H. Plans for Nationwide Serosurveillance Network in Vietnam. Emerg Infect Dis 2019; 26. [PMID: 31855527 PMCID: PMC6924907 DOI: 10.3201/eid2601.190641] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
In recent years, serosurveillance has gained momentum as a way of determining disease transmission and immunity in populations, particularly with respect to vaccine-preventable diseases. At the end of 2017, the Oxford University Clinical Research Unit and the National Institute of Hygiene and Epidemiology held a meeting in Vietnam with national policy makers, researchers, and international experts to discuss current seroepidemiologic projects in Vietnam and future needs and plans for nationwide serosurveillance. This report summarizes the meeting and the plans that were discussed to set up nationwide serosurveillance in Vietnam.
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Katoh S, Cuong NC, Hamaguchi S, Thuy PT, Cuong DD, Anh LK, Anh NTH, Anh DD, Sando E, Suzuki M, Fujita H, Yasunami M, Yoshihara K, Yoshida LM, Paris DH, Ariyoshi K. Challenges in diagnosing scrub typhus among hospitalized patients with undifferentiated fever at a national tertiary hospital in northern Vietnam. PLoS Negl Trop Dis 2019; 13:e0007928. [PMID: 31805053 PMCID: PMC6917290 DOI: 10.1371/journal.pntd.0007928] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 12/17/2019] [Accepted: 11/14/2019] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Scrub typhus (ST) is a leading cause of non-malarial febrile illness in Southeast Asia, but evidence of its true disease burden is limited because of difficulties of making the clinical diagnosis and lack of adequate diagnostic tests. To describe the epidemiology and clinical characteristics of ST, we conducted an observational study using multiple diagnostic assays at a national tertiary hospital in Hanoi, Vietnam. METHODOLOGY/PRINCIPAL FINDINGS We enrolled 1,127 patients hospitalized with documented fever between June 2012 and May 2013. Overall, 33 (2.9%) patients were diagnosed with ST by PCR and/or screening of ELISA for immunoglobulin M (IgM) with confirmatory tests: 14 (42.4%) were confirmed by indirect immunoperoxidase assay (IIP), and 19 (57.6%) were by IIP and PCR. Living by farming, conjunctival injection, eschar, aspartate aminotransferase elevation, and alanine aminotransferase elevation were significantly associated with ST cases (adjusted odds ratios (aORs): 2.8, 3.07, 48.8, 3.51, and 4.13, respectively), and having a comorbidity and neutrophilia were significantly less common in ST cases (aORs: 0.29 and 0.27, respectively). The majority of the ST cases were not clinically diagnosed with rickettsiosis (72.7%). Dominant IIP reactions against a single antigen were identified in 15 ST cases, whereas indistinguishably high reactions against multiple antigens were seen in 11 ST cases. The most frequently observed dominant IIP reaction was against Karp antigen (eight cases) followed by Gilliam (four cases). The highest diagnostic accuracy of IgM ELISA in acute samples was 78%. In a phylogenetic analysis of the 56-kDa type-specific antigen gene, the majority (14 cases) were located in the Karp-related branch followed by the Gilliam-related (two cases), Kato-related (two cases), and TA763-related clades (one case). CONCLUSIONS/SIGNIFICANCE Both the clinical and laboratory diagnoses of ST remain challenging at a tertiary hospital. Implementation of both serological and nucleic acid amplification assays covering endemic O. tsutsugamushi strains is essential.
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Affiliation(s)
- Shungo Katoh
- Department of Clinical Medicine, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Department of General Internal Medicine, Nagasaki Rosai Hospital, Nagasaki, Japan
| | - Ngo Chi Cuong
- Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Department of Infectious Diseases, Bach Mai Hospital, Hanoi, Vietnam
| | - Sugihiro Hamaguchi
- Department of General Internal Medicine, Fukushima Medical University, Fukushima, Japan
| | - Pham Thanh Thuy
- Department of Infectious Diseases, Bach Mai Hospital, Hanoi, Vietnam
- The Partnership for Health Advancement in Vietnam (HAIVN), Hanoi, Vietnam
| | - Do Duy Cuong
- Department of Infectious Diseases, Bach Mai Hospital, Hanoi, Vietnam
| | - Le Kim Anh
- Vietnam Research Station, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Hanoi, Vietnam
| | | | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Eiichiro Sando
- Department of Clinical Medicine, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Department of General Internal Medicine, Kameda Medical Center, Chiba, Japan
| | - Motoi Suzuki
- Department of Clinical Medicine, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan
| | - Hiromi Fujita
- Mahara Institute of Medical Acarology, Tokushima, Japan
| | - Michio Yasunami
- Department of Clinical Medicine, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Saga-Ken Medical Centre Koseikan, Saga, Japan
| | - Keisuke Yoshihara
- Department of Paediatric Infectious Diseases, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Lay-Myint Yoshida
- Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- Department of Paediatric Infectious Diseases, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Daniel Henry Paris
- Department of Medicine, Swiss Tropical and Public Health Institute, Basel, Switzerland
- Faculty of Medicine, University of Basel, Basel, Switzerland
| | - Koya Ariyoshi
- Department of Clinical Medicine, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Nagasaki University Graduate School of Biomedical Sciences, Nagasaki, Japan
- School of Tropical Medicine and Global Health, Nagasaki University, Nagasaki, Japan
- * E-mail:
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Duong TN, Thiem VD, Anh DD, Cuong NP, Thang TC, Huong VM, Chien VC, Phuong NTL, Montomoli E, Holt R, Scorza FB, Flores J, Tewari T. A Phase 2/3 double blinded, randomized, placebo-controlled study in healthy adult participants in Vietnam to examine the safety and immunogenicity of an inactivated whole virion, alum adjuvanted, A(H5N1) influenza vaccine (IVACFLU-A/H5N1). Vaccine 2019; 38:1541-1550. [PMID: 31812464 DOI: 10.1016/j.vaccine.2019.11.059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2019] [Revised: 11/20/2019] [Accepted: 11/22/2019] [Indexed: 11/29/2022]
Abstract
BACKGROUND A global shortfall of vaccines for avian influenza A(H5N1) would occur, especially in low- and-middle income countries, if a pandemic were to occur. To address this issue, development of a pre-pandemic influenza vaccine was initiated in 2012, leveraging a recently established influenza vaccine manufacturing capacity in Vietnam. METHODS This was a Phase 2/3, double-blinded, randomized, placebo-controlled study to test the safety and immunogenicity of IVACFLU-A/H5N1 vaccine in healthy adults. Phase 2 was a dose selection study, in which 300 participants were randomized to one of the three groups (15 mcg, 30 mcg, or placebo). Safety and immunogenicity were assessed in all participants. In Phase 3, 630 participants were randomized to receive the IVACFLU-A/H5N1 vaccine dose selected in Phase 2 (15 mcg, n = 525) or placebo (n = 105). Safety was assessed in all Phase 3 participants and immunogenicity was measured in a subset of participants. RESULTS The vaccine was well tolerated and most of the adverse events were mild and of short duration. Mild pain at the injection site was the most common adverse event seen in 60 percent of participants in the vaccine group in Phase 3. In Phase 2, both 15 mcg and 30 mcg doses were immunogenic, so the lower dose was selected for further testing in Phase 3. In Phase 3 overall seroconversion rates were 68 percent for hemagglutination inhibition (HI), 51 percent for microneutralization (MN) and 56 percent for single radial hemolysis (SRH). The seroprotection rates were 44 percent for HI, 41 percent for MN and 55 percent for SRH. The GMT ratio was 5.31 and 3.7 for HI and MN respectively; GMA was 4.75 for the SRH. CONCLUSION The IVACFLU A/H5N1 was safe and immunogenic. Development of this pandemic avian influenza vaccine is a welcome addition to the limited global pool of these vaccines. ClinicalTrials.gov register NCT02612909.
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Affiliation(s)
- Tran Nhu Duong
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | - Vu Dinh Thiem
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | | | | | | | - Vien Chinh Chien
- Institute of Vaccines and Medical Biologicals, Nha Trang, Viet Nam
| | | | - Emanuele Montomoli
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy; VisMederi srl, Siena, Italy
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Huyen DTT, Mach O, Thanh Trung N, Thai PQ, Thang HV, Weldon WC, Oberste MS, Jeyaseelan V, Sutter RW, Anh DD. Rapid Disappearance of Poliovirus Type 2 (PV2) Immunity in Young Children Following Withdrawal of Oral PV2-Containing Vaccine in Vietnam. J Infect Dis 2019; 220:386-391. [PMID: 30869149 PMCID: PMC9069936 DOI: 10.1093/infdis/jiz124] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2019] [Accepted: 03/13/2019] [Indexed: 09/17/2023] Open
Abstract
BACKGROUND Due to global shortage of inactivated poliovirus vaccine and withdrawal of oral vaccine containing poliovirus type 2 (PV2), a PV2-containing vaccine was not used in Vietnam May 2016 to October 2018. We assessed the population immunity gap to PV2. METHODS A cross-sectional survey in children aged 1-18 months was carried out in January 2018. One blood sample per child was analyzed for presence of poliovirus neutralizing antibodies. In children with detectable anti-PV2 antibodies, a second sample was analyzed 4 months later to distinguish between passive (maternally derived) and active (induced by secondary transmission or vaccination) immunity. RESULTS Sera were obtained from 1106/1110 children. Seroprevalence of PV2 antibodies was 87/368 (23.6%) at age 1-7 months, 27/471 (5.7%) at 8-15 months, and 19/267 (7.1%) at 16-18 months. Seroprevalence declined with age in the 1-7 months group; in the 8-18 months group there was no significant change with age. Four months later, 11/87 (14%), 9/27 (32%), and 12/19 (37%) remained seropositive in 1-7, 8-15, and 16-18 months age groups, respectively. CONCLUSIONS We found declining immunity to PV2, suggesting Vietnam is at risk for an outbreak of type 2 vaccine-derived poliovirus following virus importation or new emergence.
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Affiliation(s)
| | - Ondrej Mach
- Polio Eradication Department, World Health Organization, Geneva, Switzerland
| | | | - Pham Quang Thai
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | - William C Weldon
- Division of Viral Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | - M Steven Oberste
- Division of Viral Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
| | | | - Roland W Sutter
- Polio Eradication Department, World Health Organization, Geneva, Switzerland
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
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Hong DT, Hien ND, Thao PTP, Anh DD, Mai HH, Huyen DTT, Huong NL, Phuong BH, Iijima M, Ito T, Nakayama T. Immunogenicity of the AIK-C measles vaccine in infants aged <9 months in Vietnam. Vaccine 2019; 37:4576-4580. [PMID: 31174936 DOI: 10.1016/j.vaccine.2019.04.025] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 04/10/2019] [Accepted: 04/12/2019] [Indexed: 10/26/2022]
Abstract
Measles-associated deaths have been reported in infants <9 months during outbreaks. A cohort study was conducted on 210 infants aged 6-8 months to evaluate the immunogenicity and safety of the AIK-C measles vaccine containing 104.21 plaque-forming units (PFU)/0.5 mL produced in Vietnam. Paired serum samples were obtained from 196 subjects. Seropositivity was defined as ≥120 mIU/mL. The seroresponse rate was 173/196 (88.27%, 95% confidence interval (CI): 83.77-92.77%) with geometric mean titer (GMT) of 511 mIU/mL (95% CI: 688-880 mIU/mL), and no significant differences were observed by different age groups. Among 196 paired sera, they were categorized into four groups: 122 subjects <14 IU/mL, 28 subjects 14-<60 mIU/mL, 30 subjects 60-<120 mIU/mL, and 16 subjects ≥ 120 mIU/mL. The seroresponse rate was 112/122 (91.8%, 95% CI: 86.94-96.67%) with GMT (597 mIU/mL, 95% CI: 749-1002 mIU/mL) in the <14 mIU/L group. In the 14-<60 mIU/mL group, the seroresponse rate was 18/28 (64.29%) with 184 mIU/L of GMT and was significantly lower (p < 0.01) than that in the <14 mIU/mL group. In the 16 seropositive group, all subjects showed seroconversion (4-fold higher than before) with a higher GMT of 1078 mIU/mL. Local pain and itching at the injection site were observed in 8 subjects (3.8%) within 7 days of the vaccination. Regarding systemic adverse reactions, febrile illness ≥37.5 °C was observed in 14 subjects (6.7%). These results indicate that the AIK-C measles vaccine is effective and safe for infants aged 6-8 months and will contribute to reducing the number of measles-associated deaths in future outbreaks.
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Affiliation(s)
- Duong Thi Hong
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | - Nguyen Dang Hien
- Center for Research and Production of Vaccine and Biological, Hanoi, Viet Nam
| | | | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | - Hoang Hong Mai
- National Institute of Hygiene and Epidemiology, Hanoi, Viet Nam
| | | | | | - Bui Huy Phuong
- Hai Duong Center for Diseases Control, Hai Duong, Viet Nam
| | | | - Takashi Ito
- Laboratory of Viral Infection II, Kitasato Institute for Life Sciences, Tokyo, Japan
| | - Tetsuo Nakayama
- Laboratory of Viral Infection II, Kitasato Institute for Life Sciences, Tokyo, Japan.
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Bac ND, Anh LT, Quang LB, Luc NK, Nga TTT, Nagi M, Yoshitsugu M, Ha HTT, Anh DD, Quyet D, Anh DN. Prevalence of Candida bloodstream isolates from patients in two hospitals in Vietnam. Iran J Microbiol 2019; 11:108-113. [PMID: 31341564 PMCID: PMC6635319] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
BACKGROUND AND OBJECTIVES Identification of yeasts provides helpful information for appropriate administration of anti-fungal treatments; however, few reports from the Vietnam have been published. This study has been performed to find the prevalence of Candida blood stream isolates from patients in two hospitals in Vietnam. MATERIALS AND METHODS Candida spp. were isolated from blood cultures in two hospitals, Vietnam between May 2013 and May 2015. Participating hospitals were 103 Military Hospital, Ha Noi city (550 beds) and Cho Ray Hospital, Ho Chi Minh city (1800 beds). All the bloodstream isolates were identified to species level by the germ tube test and polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP). In addition, unknown isolates were subjected to PCR sequencing. RESULTS A total of 93 Candida isolates were isolated from blood cultures during the study period. The results of this study showed that C. tropicalis (n = 47, 50.54%) was the most common agent, followed by Candida albicans/dubliniensis (n = 18, 19.35%), C. parapsilosis (n = 16, 17.20%), C. glabrata (n = 6, 6.45%), C. mesorugosa (n = 5, 5.38%) and C. krusei (n = 1, 1.08%), respectively. CONCLUSION The frequency of the non-albicans Candida species in blood is increasing, especially C. tropicalis. Additional investigations should be made to clarify the epidemiological profile of invasive Candida bloodstream in Vietnam.
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Affiliation(s)
- Nguyen Duy Bac
- Department of Genetics and Cytogenetics, Institute for Military Medical Research, Military Medical University, Ha Noi, Vietnam
| | - Le Tran Anh
- Department of Medical Parasitology, Military Medical University, Ha Noi, Vietnam
| | - Le Bach Quang
- Department of Medical Parasitology, Military Medical University, Ha Noi, Vietnam
| | - Nguyen Khac Luc
- Department of Medical Parasitology, Military Medical University, Ha Noi, Vietnam
| | - Tran Thi Thanh Nga
- Department of Medical Bacteriology, Choray Hospital, Ho Chi Minh, Vietnam
| | - Minoru Nagi
- Department of Chemotherapy and Mycoses, National Institute of Infectious Diseases, Tokyo, Japan
| | - Miyazaki Yoshitsugu
- Department of Chemotherapy and Mycoses, National Institute of Infectious Diseases, Tokyo, Japan
| | - Hoang Thi Thu Ha
- Department of Bacteriology, National Institute of Hygiene Epidemiology, Ha Noi, Vietnam
| | - Dang Duc Anh
- Department of Bacteriology, National Institute of Hygiene Epidemiology, Ha Noi, Vietnam
| | - Do Quyet
- Department of Tuberculosis and Lung Diseases, 103 Military Hospital, Military Medical University, Ha Noi, Vietnam
| | - Do Ngoc Anh
- Department of Medical Parasitology, Military Medical University, Ha Noi, Vietnam
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Ahmed MU, Baquilod M, Deola C, Tu ND, Anh DD, Grasso C, Gautam A, Hamzah WM, Heng S, Iamsirithaworn S, Kadim M, Kar SK, Le Thi Quynh M, Lopez AL, Lynch J, Memon I, Mengel M, Long VN, Pandey BD, Quadri F, Saadatian-Elahi M, Gupta SS, Sultan A, Sur D, Tan DQ, Ha HTT, Hein NT, Lan PT, Upreti SR, Endtz H, Ganguly NK, Legros D, Picot V, Nair GB. Cholera prevention and control in Asian countries. BMC Proc 2018; 12:62. [PMID: 30807619 PMCID: PMC6284268 DOI: 10.1186/s12919-018-0158-1] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Cholera remains a major public health problem in many countries. Poor sanitation and inappropriate clean water supply, insufficient health literacy and community mobilization, absence of national plans and cross-border collaborations are major factors impeding optimal control of cholera in endemic countries. In March 2017, a group of experts from 10 Asian cholera-prone countries that belong to the Initiative against Diarrheal and Enteric Diseases in Africa and Asia (IDEA), together with representatives from the World Health Organization, the US National Institutes of Health, International Vaccine Institute, Agence de médecine préventive, NGOs (Save the Children) and UNICEF, met in Hanoi (Vietnam) to share progress in terms of prevention and control interventions on water, sanitation and hygiene (WASH), surveillance and oral cholera vaccine use. This paper reports on the country situation, gaps identified in terms of cholera prevention and control and strategic interventions to bridge these gaps.
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Affiliation(s)
| | | | | | - Nguyen Dong Tu
- 4National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Dang Duc Anh
- 4National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Cindy Grasso
- 5Fondation Mérieux, 17 rue Bourgelat, 69002 Lyon, France
| | | | | | - Seng Heng
- 8Ministry of Health Cambodia, Phnom Penh, Cambodia
| | | | - Musal Kadim
- Indonesia Pediatric Society, Jakarta, Indonesia
| | - S K Kar
- 11S'O'A University, Bhubaneswar, Odisha India
| | | | | | - Julia Lynch
- 13International Vaccine Institute, Seoul, South Korea
| | - Iqbal Memon
- Pakistan Pediatric Association, Karachi, Pakistan
| | | | | | | | - Firdausi Quadri
- 18International Centre for Diarrhoeal Disease Research (icddr,b), Dhaka, Bangladesh
| | | | - Sanjukta Sen Gupta
- 20Translational Health Science and Technology Institute, Pali, Haryana India
| | | | - Dipika Sur
- 22Program for Appropriate Technology in Health (PATH), New Delhi, India
| | | | | | | | | | | | - Hubert Endtz
- 5Fondation Mérieux, 17 rue Bourgelat, 69002 Lyon, France
| | - N K Ganguly
- 20Translational Health Science and Technology Institute, Pali, Haryana India
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Burnett E, Van Trang N, Rayamajhi A, Yousafzai MT, Satter SM, Anh DD, Thapa A, Qazi SH, Heffelfinger JD, Hung PH, Rayamajhi AK, Saddal N, Flora MS, Canh TM, Ali SA, Gurley ES, Tate JE, Yen C, Parashar UD. Preparing for safety monitoring after rotavirus vaccine introduction - Assessment of baseline epidemiology of intussusception among children <2 years of age in four Asian countries. Vaccine 2018; 36:7593-7598. [PMID: 30414781 PMCID: PMC10983083 DOI: 10.1016/j.vaccine.2018.11.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Revised: 10/29/2018] [Accepted: 11/01/2018] [Indexed: 11/23/2022]
Abstract
Intussusception is the invagination of one segment of the bowel into a distal segment, characterized by symptoms of bloody stool, vomiting, and abdominal pain. Previous studies have found regional differences in incidence but the etiology of most intussusception cases is unknown. Rotavirus vaccines were associated with a slightly of increased risk of intussusception in post-licensure evaluations in high- and middle-income countries, but not in low income African countries. To describe the baseline epidemiology of intussusception in young children prior to rotavirus vaccine implementation, active sentinel hospital surveillance for intussusception in children < 2 years of age was conducted in 4 low income Asian countries (Bangladesh, Nepal, Pakistan and Vietnam). Over a 24-month period, 15 sites enrolled 1,415 intussusception cases, of which 70% were enrolled in Vietnam. Overall, 61% of cases were male and 1% (n = 16) died, ranging from 8% in Pakistan to 0% in Vietnam. The median age of cases enrolled ranged from 6 months in Bangladesh and Pakistan to 12 months in Vietnam. The proportion of cases receiving surgical management was 100% in Bangladesh, 88% in Pakistan, 61% in Nepal, and 1% in Vietnam. The high proportion of males and median age of cases around 6 months of age found in this regional surveillance network are consistent with previous descriptions of the epidemiology of intussusception in these countries and elsewhere. Differences in management and the fatality rate of cases between the countries likely reflect differences in access to healthcare and availability of diagnostic modalities. These baseline data will be useful for post-rotavirus vaccine introduction safety monitoring.
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Affiliation(s)
- Eleanor Burnett
- CDC Foundation for the US Centers for Disease Control and Prevention, Atlanta, GA, USA.
| | - Nguyen Van Trang
- National Institute of Hygiene and Epidemiology, Ha Noi, Viet Nam
| | - Ajit Rayamajhi
- Janek Medical and Research Center, Kathmandu, Nepal; Kanthi Children's Hospital, Kathmandu, Nepal
| | | | | | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Ha Noi, Viet Nam
| | | | - Saqib Hamid Qazi
- Department of Pediatric Surgery, Aga Khan University, Karachi, Pakistan
| | | | | | | | - Nasir Saddal
- Department of Surgery, National Institute of Child Health, Karachi, Pakistan
| | - Meerjady S Flora
- Institute of Epidemiology, Disease Control and Research (IEDCR), Dhaka, Bangladesh
| | | | - Syed Asad Ali
- Department of Paediatrics & Child Health, Aga Khan University, Karachi, Pakistan
| | | | | | - Catherine Yen
- Centers for Disease Control and Prevention, Atlanta, USA
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Althouse BM, Flasche S, Minh LN, Thiem VD, Hashizume M, Ariyoshi K, Anh DD, Rodgers GL, Klugman KP, Hu H, Yoshida LM. Seasonality of respiratory viruses causing hospitalizations for acute respiratory infections in children in Nha Trang, Vietnam. Int J Infect Dis 2018; 75:18-25. [PMID: 30118916 PMCID: PMC7110808 DOI: 10.1016/j.ijid.2018.08.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 08/01/2018] [Accepted: 08/02/2018] [Indexed: 01/21/2023] Open
Abstract
Hospitalizations for respiratory viruses are seasonal in Vietnam Respiratory syncytial virus peaks in the late summer months, and inuenza A in April to June No clear seasonality is seen for human rhinovirus Human parainuenza 3 and human rhinovirus are positively associated with dew point This work can inform the timing of inuenza and RSV vaccination and the judicious use of antibiotics in Vietnam
Background Acute respiratory infections (ARIs) are the most common causes of death in children under 5 years of age. While the etiology of most pneumonia and ARI episodes is undiagnosed, a broad range of ARI-causing viruses circulate widely in South East Asia. However, the patterns and drivers of the seasonal transmission dynamics are largely unknown. Here we identify the seasonal patterns of multiple circulating viruses associated with hospitalizations for ARIs in Nha Trang, Vietnam. Methods Hospital based enhanced surveillance of childhood ARI is ongoing at Khanh Hoa General Hospital in Nha Trang. RT-PCR was performed to detect 13 respiratory viruses in nasopharyngeal samples from enrolled patients. Seasonal patterns of childhood ARI hospital admissions of various viruses were assessed, as well as their association with rainfall, temperature, and dew point. Results Respiratory syncytial virus peaks in the late summer months, and influenza A in April to June. We find significant associations between detection of human parainfluenza 3 and human rhinovirus with the month's mean dew point. Using a cross-wavelet transform we find a significant out-of-phase relationship between human parainfluenza 3 and temperature and dew point. Conclusions Our results are important for understanding the temporal risk associated with circulating pathogens in Southern Central Vietnam. Specifically, our results can inform timing of routing seasonal influenza vaccination and for when observed respiratory illness is likely viral, leading to judicious use of antibiotics in the region.
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Affiliation(s)
- Benjamin M Althouse
- Institute for Disease Modeling, Bellevue, WA, USA; University of Washington, Seattle, WA, USA; New Mexico State University, Las Cruces, NM, USA.
| | - Stefan Flasche
- London School of Hygiene and Tropical Medicine, London, UK, USA
| | - Le Nhat Minh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Vu Dinh Thiem
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | - Koya Ariyoshi
- Institute of Tropical Medicine, Nagasaki University, Japan
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | | | - Hao Hu
- Institute for Disease Modeling, Bellevue, WA, USA
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Le Polain De Waroux O, Edmunds WJ, Takahashi K, Ariyoshi K, Mulholland EK, Goldblatt D, Choi YH, Anh DD, Yoshida LM, Flasche S. Predicting the impact of pneumococcal conjugate vaccine programme options in Vietnam. Hum Vaccin Immunother 2018; 14:1939-1947. [PMID: 29781740 PMCID: PMC6149911 DOI: 10.1080/21645515.2018.1467201] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Although catch-up campaigns (CCs) at the introduction of pneumococcal conjugate vaccines (PCVs) may accelerate their impact, supply constraints may limit their benefit if the need for additional PCV doses results in introduction delay. We studied the impact of PCV13 introduction with and without CC in Nha Trang, Vietnam – a country that has not yet introduced PCV – through a dynamic transmission model. We modelled the impact on carriage and invasive pneumococcal disease (IPD) of routine vaccination (RV) only and that of RV with CCs targeting <1y olds (CC1), <2y olds (CC2) and <5y olds (CC5). The model was fitted to nasopharyngeal carriage data, and post-PCV predictions were based on best estimates of parameters governing post-PCV dynamics. With RV only, elimination in carriage of vaccine-type (VT) serotypes is predicted to occur across all age groups within 10 years after introduction, with near-complete replacement by non-VT. Most of the benefit of CCs is predicted to occur within the first 3 years with the highest impact at one year, when IPD incidence is predicted to be 11% (95%CrI 9 – 14%) lower than RV with CC1, 25% (21 – 30 %) lower with CC2 and 38% (32 – 46%) lower with CC5. However, CCs would only prevent more cases of IPD insofar as such campaigns do not delay introduction by more than about 6, 12 and 18 months for CC1, CC2 and CC5. Those findings are important to help guide vaccine introduction in countries that have not yet introduced PCV, particularly in Asia.
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Affiliation(s)
- Olivier Le Polain De Waroux
- a Centre for the mathematical modelling of infectious diseases, Department of Infectious Disease Epidemiology , London School of Hygiene and Tropical Medicine , London , UK
| | - W John Edmunds
- a Centre for the mathematical modelling of infectious diseases, Department of Infectious Disease Epidemiology , London School of Hygiene and Tropical Medicine , London , UK
| | - Kensuke Takahashi
- b Institute of Tropical Medicine, Nagasaki University , Nagasaki , Japan
| | - Koya Ariyoshi
- b Institute of Tropical Medicine, Nagasaki University , Nagasaki , Japan
| | - E Kim Mulholland
- a Centre for the mathematical modelling of infectious diseases, Department of Infectious Disease Epidemiology , London School of Hygiene and Tropical Medicine , London , UK.,c Menzies School of Health Research, Charles Darwin University , Darwin , Australia
| | - David Goldblatt
- d Institute of Child Health, University College London , London , UK
| | - Yoon Hong Choi
- e Immunisation, Hepatitis and Blood Safety Department , Public Health England , London , UK.,f Modelling and Economics Unit, Public Health England , London , UK
| | - Dang Duc Anh
- g National Institute of Hygiene and Epidemiology , Hanoi , Vietnam
| | - Lay Myint Yoshida
- b Institute of Tropical Medicine, Nagasaki University , Nagasaki , Japan
| | - Stefan Flasche
- a Centre for the mathematical modelling of infectious diseases, Department of Infectious Disease Epidemiology , London School of Hygiene and Tropical Medicine , London , UK
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Huyen DTT, Hong DT, Trung NT, Hoa TTN, Oanh NK, Thang HV, Thao NTT, Hung DM, Iijima M, Fox K, Grabovac V, Heffelfinger J, Batmunkh N, Anh DD. Epidemiology of acute diarrhea caused by rotavirus in sentinel surveillance sites of Vietnam, 2012-2015. Vaccine 2018; 36:7894-7900. [PMID: 29784467 DOI: 10.1016/j.vaccine.2018.05.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Revised: 04/10/2018] [Accepted: 05/01/2018] [Indexed: 11/26/2022]
Abstract
A prospective, multicentre study was conducted in four sentinel surveillance hospitals to assess the trend and epidemiology of acute diarrhea caused by Rotavirus in Vietnam. During the period 2012-2015, a total 8,889 children under 5 years of age were enrolled in the surveillance, and 8689 stool samples were collected. Of these cases, Rotavirus was most common pathogen 46.7% (4054 cases); in which 26.6% (1117) rotavirus-positive stool samples were evaluated to identify genotypes. The proportion of rotavirus positive specimens decreased annually from 54.7% in 2012 to 36.6% in 2015. Rotavirus was detected year-round, but most rotavirus gastroenteritis cases (77.1%) occurred between December and May, corresponding to the rotavirus seasonality. It is found that the peaks varied by regions. Rotavirus positivities varied between the youngest and oldest age, but children 6-11 months old (38.8%) and 12-23 months old (38.4%) counted for most cases. A significant higher number of diarrhea within 24 hours (8.3 times, 95%CI: 8.1-8.4 times) and higher proportion of severe dehydration (12.9%) in Rotavirus positive group than that in Rotavirus negative group (7.7 times, 95%CI: 7.6-7.9 times; and 9.7%, respectively). A downtrend of prevalence of G1P[8] was observed from 82% in 2013 to 15% in 2015. However, G2P[4] was found in 5% of samples in 2012, 9% in 2013, 36% in 2014, and 28% in 2015. Rotavirus infection is the most important cause of acute diarrhea among hospitalized children in Vietnam, and a rotavirus vaccination program for children may significantly reduce this disease.
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Affiliation(s)
| | - Duong Thi Hong
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | | | | | | | | | | | | | - Kimberley Fox
- Global Immunization Division, Centers for Diesease Control and Prevention, USA.
| | - Varja Grabovac
- Expanded Programme on Immunization, Division of Communicable Diseases, Western Pacific Regional Office, Manila, Philippines.
| | - James Heffelfinger
- Expanded Programme on Immunization, Division of Communicable Diseases, Western Pacific Regional Office, Manila, Philippines.
| | - Nyambat Batmunkh
- Expanded Programme on Immunization, Division of Communicable Diseases, Western Pacific Regional Office, Manila, Philippines.
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam.
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Lee HS, Thiem VD, Anh DD, Duong TN, Lee M, Grace D, Nguyen-Viet H. Geographical and temporal patterns of rabies post exposure prophylaxis (PEP) incidence in humans in the Mekong River Delta and Southeast Central Coast regions in Vietnam from 2005 to 2015. PLoS One 2018; 13:e0194943. [PMID: 29634746 PMCID: PMC5892892 DOI: 10.1371/journal.pone.0194943] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 03/13/2018] [Indexed: 12/25/2022] Open
Abstract
BACKGROUND In Vietnam, rabies has been a notifiable disease for more than 40 years. Over the last five years, on average, more than 350,000 people per year have been bitten by dogs and cats while more than 80 human deaths have been reported yearly. No studies have been conducted to evaluate the geographical and temporal patterns of rabies in humans in Vietnam. Therefore, the main objective of this study was to assess the geographical and temporal distributions of rabies post exposure prophylaxis (PEP) incidence in humans in Vietnam from 2005 to 2015. METHODS Average incidence rabies (AIR) PEP rates for every 3 or 4 years (2005-2008, 2009-2012 and 2013-2015) were calculated to describe the spatial distribution of rabies PEP. Hotspot analysis was implemented to identify patterns of spatial significance using the Getis-Ord Gi statistic. For temporal pattern analysis, two regions [Mekong River Delta (MRD) and Southeast Central Coast (SCC)], with the highest incidence rates, and the seasonal-decomposition procedure based on loess (STL), were compared to assess their temporal patterns of rabies PEP. FINDINGS We found hotspots in southern Vietnam and coldspots in northern Vietnam during the study period. Rabies cases were limited to specific areas. In addition, the hotspot analysis showed that new risk areas were identified in each period which were not observed in incidence rate maps. The seasonal plots showed seasonal patterns with a strong peak in February/July and a minor peak in October/December in the MRD region. However, in the SCC, a small peak was detected at the early part of each year and a strong peak in the middle of each year. CONCLUSION Our findings provide insight into understanding the geographical and seasonal patterns of rabies PEP in Vietnam. This study provides evidence to aid policy makers when making decisions and investing resources. Such information may also be utilized to raise public awareness to prevent rabies exposures and reduce unnecessary PEP.
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Affiliation(s)
- Hu Suk Lee
- International Livestock Research Institute, Hanoi, Vietnam
- * E-mail:
| | - Vu Dinh Thiem
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Tran Nhu Duong
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Mihye Lee
- Medical Microbiology Department, The Royal Bournemouth Hospital, Bournemouth, United Kingdom
| | - Delia Grace
- International Livestock Research Institute, Nairobi, Kenya
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Quyen DL, Thanh Le N, Van Anh CT, Nguyen NB, Hoang DV, Montgomery JL, Kutcher SC, Hoang Le N, Hien NT, Hue Kien DT, Rabaa M, O’Neill SL, Simmons CP, Anh DD, Anders KL. Epidemiological, Serological, and Virological Features of Dengue in Nha Trang City, Vietnam. Am J Trop Med Hyg 2018; 98:402-409. [PMID: 29313471 PMCID: PMC5929208 DOI: 10.4269/ajtmh.17-0630] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Accepted: 10/31/2017] [Indexed: 11/07/2022] Open
Abstract
Vietnam is endemic for dengue. We conducted a series of retrospective and prospective studies to characterize the epidemiology of dengue and population mobility patterns in Nha Trang city, Vietnam, with a view to rational design of trials of community-level interventions. A 10-year time series of dengue case notifications showed pronounced interannual variability, as well as spatial heterogeneity in ward-level dengue incidence (median annual coefficient of variation k = 0.47). Of 451 children aged 1-10 years enrolled in a cross-sectional serosurvey, almost one-third had evidence of a past dengue virus (DENV) infection, with older children more likely to have a multitypic response indicative of past exposure to ≥ 1 serotype. All four DENV serotypes were detected in hospitalized patients during 8 months of sampling in 2015. Mobility data collected from 1,000 children and young adults via prospective travel diaries showed that, although all ages spent approximately half of their daytime hours (5:00 am-9:00 pm) at home, younger age groups (≤ 14 years) spent a significantly greater proportion of their time within 500 m of home than older respondents. Together these findings inform the rational design of future trials of dengue preventive interventions in this setting by identifying 1) children < 7 years as an optimal target group for a flavivirus-naive serological cohort, 2) children and young adults as the predominant patient population for a study with a clinical end point of symptomatic dengue, and 3) substantial spatial and temporal variations in DENV transmission, with a consequent requirement for a trial to be large enough and of long enough duration to overcome this heterogeneity.
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Affiliation(s)
- Duong Le Quyen
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
- Institute for Vector Borne Disease, Monash University, Clayton, Australia
| | - Nguyen Thanh Le
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Cao Thi Van Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | - Dong Van Hoang
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | - Simon C. Kutcher
- Institute for Vector Borne Disease, Monash University, Clayton, Australia
| | - Nguyen Hoang Le
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | - Duong Thi Hue Kien
- Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam
| | - Maia Rabaa
- Institute for Vector Borne Disease, Monash University, Clayton, Australia
| | - Scott L. O’Neill
- Institute for Vector Borne Disease, Monash University, Clayton, Australia
| | - Cameron P. Simmons
- Institute for Vector Borne Disease, Monash University, Clayton, Australia
- Wellcome Trust Major Overseas Programme, Oxford University Clinical Research Unit, Hospital for Tropical Diseases, Ho Chi Minh City, Vietnam
- Department of Microbiology and Immunology, University of Melbourne, Doherty Institute, Melbourne, Australia
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
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Deen J, Lopez AL, Kanungo S, Wang XY, Anh DD, Tapia M, Grais RF. Improving rotavirus vaccine coverage: Can newer-generation and locally produced vaccines help? Hum Vaccin Immunother 2017; 14:495-499. [PMID: 29135339 PMCID: PMC5806648 DOI: 10.1080/21645515.2017.1403705] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
There are two internationally available WHO-prequalified oral rotavirus vaccines (Rotarix and RotaTeq), two rotavirus vaccines licensed in India (Rotavac and Rotasiil), one in China (Lanzhou lamb rotavirus vaccine) and one in Vietnam (Rotavin-M1), and several candidates in development. Rotavirus vaccination has been rolled out in Latin American countries and is beginning to be deployed in sub-Saharan African countries but middle- and low-income Asian countries have lagged behind in rotavirus vaccine introduction. We provide a mini-review of the leading newer-generation rotavirus vaccines and compare them with Rotarix and RotaTeq. We discuss how the development and future availability of newer-generation rotavirus vaccines that address the programmatic needs of poorer countries may help scale-up rotavirus vaccination where it is needed.
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Affiliation(s)
- Jacqueline Deen
- a Institute of Child Health and Human Development, University of the Philippines Manila-National Institutes of Health , Manila , Philippines
| | - Anna Lena Lopez
- a Institute of Child Health and Human Development, University of the Philippines Manila-National Institutes of Health , Manila , Philippines
| | - Suman Kanungo
- b Division of Epidemiology , ICMR-National Institute of Cholera and Enteric Diseases, Beliaghata , Kolkata , West Bengal , India
| | - Xuan-Yi Wang
- c Key Laboratory of Medical Molecular Virology of MoE & MoH, and Institutes of Biomedical Sciences , Fudan University , Shanghai , China
| | - Dang Duc Anh
- d National Institute of Hygiene and Epidemiology , Hanoi , Vietnam
| | - Milagritos Tapia
- e Center for Vaccine Development, University School of Medicine , Baltimore , MD , USA
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Anh DD, Van Der Meeren O, Karkada N, Assudani D, Yu TW, Han HH. Safety and reactogenicity of the combined diphtheria-tetanus-acellular pertussis-inactivated poliovirus-Haemophilus influenzae type b (DTPa-IPV/Hib) vaccine in healthy Vietnamese toddlers: An open-label, phase III study. Hum Vaccin Immunother 2017; 12:655-7. [PMID: 26337197 PMCID: PMC4964705 DOI: 10.1080/21645515.2015.1084451] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
Abstract
The introduction of combination vaccines plays a significant role in increasing vaccine acceptance and widening vaccine coverage. Primary vaccination against diphtheria, tetanus, pertussis, poliomyelitis and Haemophilus influenza type b (Hib) diseases has been implemented in Vietnam. In this study we evaluated the safety and reactogenicity of combined diphtheria-tetanus-pertussis-inactivated polio (DTPa-IPV)/Hib vaccine when administered as a booster dose in 300 healthy Vietnamese children <2 years of age (mean age: 15.8 months). During the 4-day follow-up period, pain (31.7%) and redness (27.3%) were the most frequent solicited local symptoms. Pain (2%) was also the most frequent grade 3 local symptom. One subject reported 2 serious adverse events that were not causally related to the study vaccine. DTPa-IPV/Hib conjugate vaccine was well tolerated as a booster dose in healthy Vietnamese children aged <2 years.
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Affiliation(s)
- Dang Duc Anh
- a National Institute of Hygiene and Epidemiology , Hanoi , Vietnam
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Vynnycky E, Yoshida LM, Huyen DTT, Trung ND, Toda K, Cuong NV, Thi Hong D, Ariyoshi K, Miyakawa M, Moriuchi H, Tho LH, Nguyen HA, Duc Anh D, Jit M, Hien NT. Modeling the impact of rubella vaccination in Vietnam. Hum Vaccin Immunother 2016; 12:150-8. [PMID: 26260857 PMCID: PMC7002053 DOI: 10.1080/21645515.2015.1060380] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Supported by GAVI Alliance, measles-rubella vaccination was introduced in Vietnam in 2014, involving a mass campaign among 1–14 year olds and routine immunization of children aged 9 months. We explore the impact on the incidence of Congenital Rubella Syndrome (CRS) during 2013–2050 of this strategy and variants involving women aged 15–35 years. We use an age and sex-structured dynamic transmission model, set up using recently-collected seroprevalence data from Central Vietnam, and also consider different levels of transmission and contact patterns. If the serological profile resembles that in Central Vietnam, the planned vaccination strategy could potentially prevent 125,000 CRS cases by 2050 in Vietnam, despite outbreaks predicted in the meantime. Targeting the initial campaign at 15–35 year old women with or without children aged 9 months–14 years led to sustained reductions in incidence, unless levels of ongoing transmission were medium-high before vaccination started. Assumptions about contact greatly influenced predictions if the initial campaign just targeted 15–35 year old women and/or levels of ongoing transmission were medium-high. Given increased interest in rubella vaccination, resulting from GAVI Alliance funding, the findings are relevant for many countries.
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Affiliation(s)
- Emilia Vynnycky
- a Public Health England ; London , UK.,b London School of Hygiene & Tropical Medicine ; London , UK
| | | | | | - Nguyen Dac Trung
- d National Institute of Hygiene and Epidemiology ; Hanoi , Vietnam
| | - Kohei Toda
- e World Health Organization Representative Office for Vietnam ; Hanoi , Vietnam
| | - Nguyen Van Cuong
- d National Institute of Hygiene and Epidemiology ; Hanoi , Vietnam
| | - Duong Thi Hong
- d National Institute of Hygiene and Epidemiology ; Hanoi , Vietnam
| | | | | | | | - Le Huu Tho
- f Khanh Hoa Provincial Public Health Service ; Nha Trang , Vietnam
| | - Hien Anh Nguyen
- d National Institute of Hygiene and Epidemiology ; Hanoi , Vietnam
| | - Dang Duc Anh
- d National Institute of Hygiene and Epidemiology ; Hanoi , Vietnam
| | - Mark Jit
- a Public Health England ; London , UK.,b London School of Hygiene & Tropical Medicine ; London , UK
| | - Nguyen Tran Hien
- d National Institute of Hygiene and Epidemiology ; Hanoi , Vietnam
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Anh DD, Thiem VD, Anh NTH, Huong VM, Nga NT, Thang TC, Thai DH, Chien VC, Holt R, Wahid R, Flores J, Berlanda Scorza F, Taylor DN. Randomized safety and immunogenicity trial of a seasonal trivalent inactivated split virion influenza vaccine (IVACFLU-S) in healthy young Vietnamese adults. Vaccine 2016; 34:5457-5462. [PMID: 27567493 DOI: 10.1016/j.vaccine.2016.08.052] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Revised: 08/12/2016] [Accepted: 08/18/2016] [Indexed: 11/30/2022]
Abstract
BACKGROUND Under the auspices of the World Health Organization (WHO) Global Action Plan, PATH supported evaluation of a trivalent, seasonal inactivated influenza vaccine candidate produced by the Institute of Vaccines and Medical Biologicals (IVAC), a Vietnamese manufacturer. METHODS In 2015, 60 healthy adult subjects 18-45years of age were enrolled in a Phase 1, single center, double blind, randomized, placebo-controlled study conducted at a district health center in Thai Binh Province, Vietnam. The study evaluated the overall safety and immunogenicity of a seasonal, trivalent inactivated split virion influenza vaccine. Volunteers were given either vaccine or placebo in a randomized 1:1 ratio. After undergoing screening, eligible volunteers provided their signed consent and were enrolled in the study. On the first day of immunization, randomly chosen volunteers received IVACFLU-S 15μg (mcg) hemagglutinin of each of the three strains in 0.5mL or placebo by intramuscular injection. All volunteers were monitored for adverse events and underwent blood testing at screening and Day 8 to assess the vaccine candidate's safety. Sera obtained before and 21days after immunization were tested for influenza antibody titers using the hemagglutination-inhibition (HAI) and microneutralization tests (MNT). RESULTS Vaccine was well tolerated, and there were no serious adverse events reported. HAI and MNT identified serum antibody responses against the three influenza strains in nearly all volunteers who received the vaccine. Overall, serum HAI responses of fourfold or greater were observed in 93 percent, 83 percent, and 77 percent of H1, H3, and B strains, respectively. Seroprotection rates were also very high. CONCLUSIONS IVAC's seasonal, trivalent influenza vaccine was safe and well tolerated and induced high levels of seroconversion and seroprotection rates. These clinical data are a first step towards demonstrating the feasibility of producing the vaccine locally and that seasonal vaccine production in Vietnam may be an effective strategy for enhancing the global influenza vaccine supply. ClinicalTrials.gov number NCT02598089, October 15, 2015.
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Affiliation(s)
- Dang Duc Anh
- National Institute of Hygiene and Epidemiology (NIHE), Hanoi, Viet Nam
| | - Vu Dinh Thiem
- National Institute of Hygiene and Epidemiology (NIHE), Hanoi, Viet Nam
| | | | - Vu Minh Huong
- PATH VN, 11th Floor, Hanoi Towers, 49 Hai Ba Trung Street, Hanoi, Viet Nam
| | - Nguyen Tuyet Nga
- PATH VN, 11th Floor, Hanoi Towers, 49 Hai Ba Trung Street, Hanoi, Viet Nam
| | - Tran Cong Thang
- PATH VN, 11th Floor, Hanoi Towers, 49 Hai Ba Trung Street, Hanoi, Viet Nam
| | - Duong Huu Thai
- Institute of Vaccines and Medical Biologicals (IVAC), Nha Trang, Viet Nam
| | - Vien Chinh Chien
- Institute of Vaccines and Medical Biologicals (IVAC), Nha Trang, Viet Nam
| | - Renee Holt
- PATH US, Seattle, WA 98121, United States
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Anh DD, Jayadeva G, Kuriyakose S, Han HH. The safety and reactogenicity of a reduced-antigen-content diphtheria-tetanus-acellular pertussis (dTpa) booster vaccine in healthy Vietnamese children. Vaccine 2016; 34:4360-3. [PMID: 27435387 DOI: 10.1016/j.vaccine.2016.07.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2015] [Revised: 06/30/2016] [Accepted: 07/04/2016] [Indexed: 11/30/2022]
Abstract
Despite effective infant immunization against pertussis, the disease continues to circulate due to waning immunity. Booster vaccinations against pertussis beyond infancy are widely recommended. In Vietnam, however, no recommendations for pertussis boosters beyond the second year of life exist. This open-label, single-centre study was designed to assess the safety of a single booster dose of reduced-antigen-content-diphtheria-tetanus-acellular-pertussis vaccine (dTpa) in 300 healthy Vietnamese children (mean age 7.9years), who had completed primary vaccination against diphtheria, tetanus and pertussis. Solicited symptoms were recorded for 4days and unsolicited and serious adverse events (SAEs) for 31days post-vaccination. Pain and fatigue were the most common solicited local and general symptoms in 35.0% and 14.0% of children, respectively. Grade 3 swelling occurred in 3 children; no large injection site reactions or SAEs were reported. The dTpa booster vaccine was well tolerated and this study supports its administration in school age Vietnamese children.
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Affiliation(s)
- Dang Duc Anh
- National Institute of Hygiene and Epidemiology, 1 Yersin, Hanoi 1000, Vietnam.
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Yamanashi H, Ngoc MQ, Huy TV, Suzuki M, Tsujino A, Toizumi M, Takahashi K, Thiem VD, Anh DD, Anh NTH, Tho LH, Maeda T, Cox SE, Yoshida LM, Ariyoshi K. Population-Based Incidence Rates of First-Ever Stroke in Central Vietnam. PLoS One 2016; 11:e0160665. [PMID: 27513471 PMCID: PMC4981455 DOI: 10.1371/journal.pone.0160665] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 07/22/2016] [Indexed: 11/28/2022] Open
Abstract
Introduction Stroke incidence data with methodologically acceptable design in Southeast Asia countries is limited. This study aimed to determine incidence of age-, sex- and subtype-specific first-ever stroke (FES) in Vietnam. Methods We conducted a hospital-based retrospective study, targeting all stroke cases hospitalized at a solo-provider hospital in our study site of Nha Trang from January 2009 to December 2011 with International Classification of Diseases, 10th revision (ICD-10) codes I60-69. We calculated positive predictive values (PPVs) of each ICD-10-coded stroke by conducting a detailed case review of 190 randomly selected admissions with ICD-10 codes of I60-I69. These PPVs were then used to estimate annual incident stroke cases from the computerized database. National census data in 2009 was used as a denominator. Results 2,693 eligible admissions were recorded during the study period. The crude annual incidence rate of total FES was 90.2 per 100,000 population (95% CI 81.1–100.2). The age-adjusted incidence of FES was 115.7 (95% CI 95.9–139.1) when adjusted to the WHO world populations. Importantly, age-adjusted intracerebral hemorrhage was as much as one third of total FES: 36.9 (95% CI 26.1–51.0). Conclusions We found a considerable proportion of FES in Vietnam to be attributable to intracerebral hemorrhage, which is as high or exceeding levels seen in high-income countries. A high prevalence of improperly treated hypertension in Vietnam may underlie the high prevalence of intracerebral hemorrhagic stroke in this population.
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Affiliation(s)
- Hirotomo Yamanashi
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki, Japan
- Department of Island and Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Goto, Nagasaki, Japan
| | - Mai Quang Ngoc
- Department of Geriatrics, Khanh Hoa Gerenral Hospital, Nha Trang, Khanh Hoa, Vietnam
| | - Tran Van Huy
- Department of Geriatrics, Khanh Hoa Gerenral Hospital, Nha Trang, Khanh Hoa, Vietnam
| | - Motoi Suzuki
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki, Japan
| | - Akira Tsujino
- Department of Neurology and Strokology, University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki, Japan
| | - Michiko Toizumi
- Department of Pediatric Infectious Diseases, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Kensuke Takahashi
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki, Japan
| | - Vu Dinh Thiem
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | - Dang Duc Anh
- National Institute of Hygiene and Epidemiology, Hanoi, Vietnam
| | | | - Le Huu Tho
- Khanh Hoa Health Service, Nha Trang, Khanh Hoa, Vietnam
| | - Takahiro Maeda
- Department of Island and Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Goto, Nagasaki, Japan
- Department of Community Medicine, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki, Japan
| | - Sharon E. Cox
- Nagasaki University School of Tropical Medicine and Global Health, Sakamoto, Nagasaki, Japan
- London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Lay-Myint Yoshida
- Department of Pediatric Infectious Diseases, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Koya Ariyoshi
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University Graduate School of Biomedical Sciences, Sakamoto, Nagasaki, Japan
- * E-mail:
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