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Yanagisawa K, Wichukchinda N, Tsuchiya N, Yasunami M, Rojanawiwat A, Tanaka H, Saji H, Ogawa Y, Handa H, Pathipvanich P, Ariyoshi K, Sawanpanyalert P. Deficiency of mannose-binding lectin is a risk of Pneumocystis jirovecii pneumonia in a natural history cohort of people living with HIV/AIDS in Northern Thailand. PLoS One 2020; 15:e0242438. [PMID: 33362211 PMCID: PMC7757797 DOI: 10.1371/journal.pone.0242438] [Citation(s) in RCA: 4] [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: 07/02/2020] [Accepted: 11/02/2020] [Indexed: 01/23/2023] Open
Abstract
Background Mannose-binding lectin (MBL) plays a pivotal role in innate immunity; however, its impact on susceptibility to opportunistic infections (OIs) has not yet been examined in a natural history cohort of people living with HIV/AIDS. Methods We used archived samples to analyze the association between MBL expression types and risk of major OIs including Pneumocystis jirovecii pneumonia (PCP), cryptococcosis, talaromycosis, toxoplasmosis, and tuberculosis in a prospective cohort in Northern Thailand conducted from 1 July 2000 to 15 October 2002 before the national antiretroviral treatment programme was launched. Results Of 632 patients, PCP was diagnosed in 96 (15.2%) patients, including 45 patients with new episodes during the follow-up period (1006.5 person-years). The total history of PCP was significantly associated with low MBL expression type: high/intermediate (81/587, 13.8%), low (10/33, 30.3%) and deficient (5/12, 41.7%) (p = 0.001), whereas the history of other OIs showed no relation with any MBL expression type. Kaplan–Meier analysis (n = 569; log-rank p = 0.011) and Cox’s proportional hazards model revealed that deficient genotype dramatically increased the risk of PCP, which is independent upon sex, age, CD4 count, HIV-1 viral load and hepatitis B and C status (adjusted hazard ratio 7.93, 95% confidence interval 2.19–28.67, p = 0.002). Conclusions Deficiency of MBL expression is a strong risk factor determining the incidence of PCP but not other major OIs.
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Affiliation(s)
- Kunio Yanagisawa
- Department of Hematology, Gunma University Hospital, Maebashi, Japan
- Infection Control and Prevention Center, Gunma University Hospital, Maebashi, Japan
| | | | - Naho Tsuchiya
- Department of Preventive Medicine and Epidemiology, Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan
| | - Michio Yasunami
- Department of Laboratory Medicine, Saga-Ken Medical Centre Koseikan, Saga, Japan
| | | | | | | | - Yoshiyuki Ogawa
- Department of Hematology, Gunma University Hospital, Maebashi, Japan
| | - Hiroshi Handa
- Department of Hematology, Gunma University Hospital, Maebashi, Japan
| | | | - Koya Ariyoshi
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
- * E-mail:
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2
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Pangjai D, Intachinda S, Maruyama S, Boonmar S, Kabeya H, Sato S, Petkanchanapong W, Wootta W, Wangroongsarb P, Boonyareth M, Saisongkorh W, Preedakoon P, Mahaprom P, Meesub C, Sawanpanyalert P. Isolation and phylogenetic analysis of Bartonella species from Rusa deer (Rusa timorensis) in Thailand. Comp Immunol Microbiol Infect Dis 2018; 56:58-62. [PMID: 29406284 DOI: 10.1016/j.cimid.2017.12.005] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2017] [Revised: 12/25/2017] [Accepted: 12/26/2017] [Indexed: 10/18/2022]
Abstract
The aim of the present study is to investigate the prevalence of Bartonella infection in deer in Thailand and to characterize the isolates by biochemical, morphological and genetic analysis. A total of 247 blood samples were collected from Rusa deer (Rusa timorensis) in a livestock breeding facility in Thailand. Bartonella bacteria were isolated in 3.6% of the blood samples. Three out of 110 (2.7%) males and 6 of 137 (4.4%) females were positive for Bartonella. A higher prevalence of Bartonella was observed in young deer under 4 years of age compared to adults over 4 years of age, but no Bartonella was isolated from deer over 8 years of age. Phylogenetic analysis of concatenated sequences of seven loci of Bartonella indicated that all the isolates from Rusa deer in Thailand were identical and formed a distinct cluster from other known Bartonella species.
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Affiliation(s)
- Decha Pangjai
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, 11000, Thailand
| | - Santaya Intachinda
- Nongkwang Livestock Breeding and Research Center, 128, Moo 10, Tambol Khaochangum, Photharam District, Ratchaburi, 70120, Thailand
| | - Soichi Maruyama
- Laboratory of Veterinary Public Health, College of Bioresource Sciences, Nihon University Fujisawa, Kanagawa, 252-0880, Japan.
| | - Sumalee Boonmar
- Rajapruk University, Bangkhanoon, Banggruay, Nonthaburi, 11130, Thailand
| | - Hidenori Kabeya
- Laboratory of Veterinary Public Health, College of Bioresource Sciences, Nihon University Fujisawa, Kanagawa, 252-0880, Japan
| | - Shingo Sato
- Laboratory of Veterinary Public Health, College of Bioresource Sciences, Nihon University Fujisawa, Kanagawa, 252-0880, Japan
| | - Wimol Petkanchanapong
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, 11000, Thailand
| | - Wattanapong Wootta
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, 11000, Thailand
| | - Piyada Wangroongsarb
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, 11000, Thailand
| | - Maskiet Boonyareth
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, 11000, Thailand
| | - Watcharee Saisongkorh
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, 11000, Thailand
| | - Poom Preedakoon
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, 11000, Thailand
| | - Panupong Mahaprom
- Faculty of Animal Science and Technology, Maejo University, Nongharn, Sansai District, Chiang Mai, 50290, Thailand
| | - Chonlada Meesub
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, 11000, Thailand
| | - Pathom Sawanpanyalert
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, 11000, Thailand
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Omae Y, Toyo-Oka L, Yanai H, Nedsuwan S, Wattanapokayakit S, Satproedprai N, Smittipat N, Palittapongarnpim P, Sawanpanyalert P, Inunchot W, Pasomsub E, Wichukchinda N, Mushiroda T, Kubo M, Tokunaga K, Mahasirimongkol S. Pathogen lineage-based genome-wide association study identified CD53 as susceptible locus in tuberculosis. J Hum Genet 2017; 62:1015-1022. [PMID: 28878339 PMCID: PMC5709719 DOI: 10.1038/jhg.2017.82] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [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: 02/20/2017] [Revised: 07/11/2017] [Accepted: 07/14/2017] [Indexed: 01/12/2023]
Abstract
Tuberculosis (TB) is known to be affected by host genetic factors. We reported a specific genetic risk factor through a genome-wide association study (GWAS) that focused on young age onset TB. In this study, we further focused on the heterogeneity of Mycobacterium tuberculosis (M. tb) lineages and assessed its possible interaction with age at onset on host genetic factors. We identified the pathogen lineage in 686 Thai TB cases and GWAS stratified by both infected pathogen lineage information and age at onset revealed a genome-wide significant association of one single-nucleotide polymorphism (SNP) on chromosome 1p13, which was specifically associated with non-Beijing lineage-infected old age onset cases (P=2.54E-08, OR=1.74 (95% CI=1.43–2.12)), when we compared them to the population-matched healthy controls. This SNP locates near the CD53 gene, which encodes a leukocyte surface glycoprotein. Interestingly, the expression of CD53 was also correlated with the patients’ active TB status. This is the first report of a pathogen lineage-based genome-wide association study. The results suggested that host genetic risk in TB is depended upon the pathogen genetic background and demonstrate the importance of analyzing the interaction between host and pathogen genomes in TB.
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Affiliation(s)
- Yosuke Omae
- Department of Human Genetics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Licht Toyo-Oka
- Department of Human Genetics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Hideki Yanai
- Fukujuji Hospital and Research Institute of Tuberculosis (RIT), Japan Anti-Tuberculosis Association (JATA), Kiyose, Japan
| | - Supalert Nedsuwan
- Chiangrai Prachanukroh Hospital, Ministry of Public Health, Chiang Rai, Thailand
| | - Sukanya Wattanapokayakit
- Medical Genetics Center, Medical Life Sciences Institute, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Nusara Satproedprai
- Medical Genetics Center, Medical Life Sciences Institute, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Nat Smittipat
- Tuberculosis Research Laboratory, National Center for Genetic Engineering and Biotechnology, National Science and Technology Development Agency, Pathum Thani, Thailand
| | | | | | - Wimala Inunchot
- Medical Genetics Center, Medical Life Sciences Institute, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Ekawat Pasomsub
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Nuanjun Wichukchinda
- Medical Genetics Center, Medical Life Sciences Institute, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Taisei Mushiroda
- Laboratory for Pharmacogenomics, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Michiaki Kubo
- Laboratory for Genotyping Development, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Katsushi Tokunaga
- Department of Human Genetics, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - Surakameth Mahasirimongkol
- Medical Genetics Center, Medical Life Sciences Institute, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
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Toyo‐oka L, Mahasirimongkol S, Yanai H, Mushiroda T, Wattanapokayakit S, Wichukchinda N, Yamada N, Smittipat N, Juthayothin T, Palittapongarnpim P, Nedsuwan S, Kantipong P, Takahashi A, Kubo M, Sawanpanyalert P, Tokunaga K. Strain‐based
HLA
association analysis identified
HLA‐DRB1
*09:01
associated with modern strain tuberculosis. HLA 2017; 90:149-156. [DOI: 10.1111/tan.13070] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Revised: 05/18/2017] [Accepted: 05/22/2017] [Indexed: 01/08/2023]
Affiliation(s)
- L. Toyo‐oka
- Medical Genetics Center, Medical Life Science Institute Department of Medical Sciences, Ministry of Public Health Nonthaburi Thailand
- Department of Human Genetics, Graduate School of Medicine The University of Tokyo Tokyo Japan
| | - S. Mahasirimongkol
- Medical Genetics Center, Medical Life Science Institute Department of Medical Sciences, Ministry of Public Health Nonthaburi Thailand
| | - H. Yanai
- Fukujuji Hospital Japan Anti‐Tuberculosis Association (JATA) Kiyose Japan
- Research Institute of Tuberculosis Japan Anti‐Tuberculosis Association (JATA) Kiyose Japan
| | - T. Mushiroda
- Laboratory for Pharmacogenomics RIKEN Center for Integrative Medical Sciences Yokohama Japan
| | - S. Wattanapokayakit
- Medical Genetics Center, Medical Life Science Institute Department of Medical Sciences, Ministry of Public Health Nonthaburi Thailand
| | - N. Wichukchinda
- Medical Genetics Center, Medical Life Science Institute Department of Medical Sciences, Ministry of Public Health Nonthaburi Thailand
| | - N. Yamada
- Research Institute of Tuberculosis Japan Anti‐Tuberculosis Association (JATA) Kiyose Japan
| | - N. Smittipat
- Tuberculosis Research Laboratory, National Center for Genetic Engineering and Biotechnology National Science and Technology Development Agency, Thailand Science Park (TSP) Pathum Thani Thailand
| | - T. Juthayothin
- Tuberculosis Research Laboratory, National Center for Genetic Engineering and Biotechnology National Science and Technology Development Agency, Thailand Science Park (TSP) Pathum Thani Thailand
| | - P. Palittapongarnpim
- Department of Microbiology, Faculty of Science Mahidol University Bangkok Thailand
| | - S. Nedsuwan
- Chiangrai Prachanukroh Hospital Ministry of Public Health Chiang Rai Thailand
| | - P. Kantipong
- Chiangrai Prachanukroh Hospital Ministry of Public Health Chiang Rai Thailand
| | - A. Takahashi
- Laboratory for Statistical Analysis RIKEN Center for Integrative Medical Sciences Yokohama Japan
| | - M. Kubo
- Laboratory for Genotyping Development RIKEN Center for Integrative Medical Sciences Yokohama Japan
| | - P. Sawanpanyalert
- Health Technical Office Ministry of Public Health Nonthaburi Thailand
| | - K. Tokunaga
- Department of Human Genetics, Graduate School of Medicine The University of Tokyo Tokyo Japan
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Dang TN, Naka I, Sa-Ngasang A, Anantapreecha S, Wichukchinda N, Sawanpanyalert P, Patarapotikul J, Tsuchiya N, Ohashi J. Association of BAK1 single nucleotide polymorphism with a risk for dengue hemorrhagic fever. BMC Med Genet 2016; 17:43. [PMID: 27401010 PMCID: PMC4940700 DOI: 10.1186/s12881-016-0305-3] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/05/2015] [Accepted: 06/22/2016] [Indexed: 11/10/2022]
Abstract
BACKGROUND Dengue hemorrhagic fever (DHF) is a severe life-threatening form of dengue infection. Low platelet count is one of the characteristic clinical manifestations in patients with severe dengue. However, little is known about genetic factors in the host that cause low platelet count in patients with dengue. METHODS A previous genome-wide association study of hematological and biochemical traits identified single nucleotide polymorphisms (SNPs) associated with low platelet count in healthy subjects. To examine the possible association of these SNPs with DHF, 918 Thai patients with dengue [509 patients with DHF and 409 with dengue fever (DF)] were genotyped for five SNPs: rs5745568 in BAK1, rs6141 in THPO, rs6065 in GP1BA, rs739496 in SH2B3, and rs385893 in RCL1. In addition, rs4804803 in CD209, that has been reported to be associated with dengue infection, was also genotyped to examine if rs4804803 affects the association detected in this study. RESULTS The allele frequencies of each SNP were compared between the DHF and DF groups. Among the five SNPs, the G allele of rs5745568 in BAK1 was significantly associated with a risk for DHF [P = 0.006 and crude odd ratio (95 % confidence interval) = 1.32 (1.09-1.60)]. The association of this allele with DHF was also significant in a logistic regression analysis adjusted for age, sex, hospital (i.e., geographic region), immune status (i.e., primary or secondary infection), and virus serotype [P = 0.016 and adjusted odd ratio (95 % confidence interval) = 1.29 (1.05-1.58)]. The result was not influenced by rs4804803 [P = 0.0167 and adjusted OR (95 % CI) = 1.29 (1.05-1.58)]. No other SNPs including rs4804803 showed significant association. CONCLUSIONS The low-level constitutive production of platelets caused by the G allele of rs5745568 seems to increase the risk of bleeding in dengue infection. Our results suggest that BCL-2 homologous antagonist/killer (BAK) protein, encoded by BAK1, plays a crucial role in the pathogenesis of DHF.
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Affiliation(s)
- Tran Ngoc Dang
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan.,Faculty of Public Health, University of Medicine and Pharmacy at Ho Chi Minh city, Ho Chi Minh City, Viet Nam
| | - Izumi Naka
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan.,Faculty of Medicine, University of Tsukuba, Tsukuba, Japan.,Graduate School of Science, The University of Tokyo, Tokyo, Japan
| | - Areerat Sa-Ngasang
- Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | | | | | | | | | - Naoyuki Tsuchiya
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan.,Faculty of Medicine, University of Tsukuba, Tsukuba, Japan
| | - Jun Ohashi
- Graduate School of Comprehensive Human Sciences, University of Tsukuba, Tsukuba, Japan. .,Faculty of Medicine, University of Tsukuba, Tsukuba, Japan. .,Graduate School of Science, The University of Tokyo, Tokyo, Japan.
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6
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Ampofo WK, Azziz-Baumgartner E, Bashir U, Cox NJ, Fasce R, Giovanni M, Grohmann G, Huang S, Katz J, Mironenko A, Mokhtari-Azad T, Sasono PM, Rahman M, Sawanpanyalert P, Siqueira M, Waddell AL, Waiboci L, Wood J, Zhang W, Ziegler T. Strengthening the influenza vaccine virus selection and development process: Report of the 3rd WHO Informal Consultation for Improving Influenza Vaccine Virus Selection held at WHO headquarters, Geneva, Switzerland, 1-3 April 2014. Vaccine 2015; 33:4368-82. [PMID: 26148877 DOI: 10.1016/j.vaccine.2015.06.090] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [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: 06/21/2015] [Accepted: 06/23/2015] [Indexed: 10/23/2022]
Abstract
Despite long-recognized challenges and constraints associated with their updating and manufacture, influenza vaccines remain at the heart of public health preparedness and response efforts against both seasonal and potentially pandemic influenza viruses. Globally coordinated virological and epidemiological surveillance is the foundation of the influenza vaccine virus selection and development process. Although national influenza surveillance and reporting capabilities are being strengthened and expanded, sustaining and building upon recent gains has become a major challenge. Strengthening the vaccine virus selection process additionally requires the continuation of initiatives to improve the timeliness and representativeness of influenza viruses shared by countries for detailed analysis by the WHO Global Influenza Surveillance and Response System (GISRS). Efforts are also continuing at the national, regional, and global levels to better understand the dynamics of influenza transmission in both temperate and tropical regions. Improved understanding of the degree of influenza seasonality in tropical countries of the world should allow for the strengthening of national vaccination policies and use of the most appropriate available vaccines. There remain a number of limitations and difficulties associated with the use of HAI assays for the antigenic characterization and selection of influenza vaccine viruses by WHOCCs. Current approaches to improving the situation include the more-optimal use of HAI and other assays; improved understanding of the data produced by neutralization assays; and increased standardization of serological testing methods. A number of new technologies and associated tools have the potential to revolutionize influenza surveillance and response activities. These include the increasingly routine use of whole genome next-generation sequencing and other high-throughput approaches. Such approaches could not only become key elements in outbreak investigations but could drive a new surveillance paradigm. However, despite the advances made, significant challenges will need to be addressed before next-generation technologies become routine, particularly in low-resource settings. Emerging approaches and techniques such as synthetic genomics, systems genetics, systems biology and mathematical modelling are capable of generating potentially huge volumes of highly complex and diverse datasets. Harnessing the currently theoretical benefits of such bioinformatics ("big data") concepts for the influenza vaccine virus selection and development process will depend upon further advances in data generation, integration, analysis and dissemination. Over the last decade, growing awareness of influenza as an important global public health issue has been coupled to ever-increasing demands from the global community for more-equitable access to effective and affordable influenza vaccines. The current influenza vaccine landscape continues to be dominated by egg-based inactivated and live attenuated vaccines, with a small number of cell-based and recombinant vaccines. Successfully completing each step in the annual influenza vaccine manufacturing cycle will continue to rely upon timely and regular communication between the WHO GISRS, manufacturers and regulatory authorities. While the pipeline of influenza vaccines appears to be moving towards a variety of niche products in the near term, it is apparent that the ultimate aim remains the development of effective "universal" influenza vaccines that offer longer-lasting immunity against a broad range of influenza A subtypes.
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Affiliation(s)
| | | | - Uzma Bashir
- National Institute of Health, Islamabad, Pakistan
| | - Nancy J Cox
- Centers for Disease Control and Prevention (CDC), Atlanta, GA, USA
| | - Rodrigo Fasce
- Public Health Institute of Chile, National Influenza Center, Chile
| | | | - Gary Grohmann
- Therapeutics Goods Administration, Symonston, Australia
| | - Sue Huang
- National Influenza Center, Upper Hutt, New Zealand
| | - Jackie Katz
- Centers for Disease Control and Prevention (CDC), Atlanta, GA, USA
| | | | | | | | - Mahmudur Rahman
- Institute of Epidemiology, Disease Control and Research, Dhaka, Bangladesh
| | | | | | | | | | - John Wood
- Formerly National Institute for Biological Standards and Control (NIBSC), Potters Bar, UK
| | - Wenqing Zhang
- World Health Organization (WHO), Geneva, Switzerland.
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7
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Tsuchiya N, Pathipvanich P, Wichukchinda N, Rojanawiwat A, Auwanit W, Ariyoshi K, Sawanpanyalert P. Incidence and predictors of regimen-modification from first-line antiretroviral therapy in Thailand: a cohort study. BMC Infect Dis 2014; 14:565. [PMID: 25361850 PMCID: PMC4226857 DOI: 10.1186/s12879-014-0565-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [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: 07/30/2014] [Accepted: 10/16/2014] [Indexed: 01/11/2023] Open
Abstract
Background Antiretroviral therapy markedly reduced mortality in HIV-infected individuals. However, in the previous studies, up to 50% of patients are compelled to modify their regimen in middle and low-income countries where salvage drug is still limited. This cohort study aimed to investigate the incidence and predictors of regimen modification from the first-line antiretroviral regimen in northern Thailand. Methods All HIV-infected patients starting antiretroviral therapy (ART) with generic drug (GPOvir®; stavudine, lamivudine and nevirapine) at a governmental hospital in northern Thailand from 2002 to 2007 were recruited. Baseline characteristics and detailed information of regimen modification until the end of 2010 were ascertained from cohort database and medical charts. As a potential genetic predictor of regimen modification, HLA B allele was determined by bead-based array hybridization (WAKFlow® HLA typing kit). We investigated predictors of the regimen modification using Cox’s proportional hazard models. Results Of 979 patients, 914 were eligible for the analysis. The observed events of regimen modification was 377, corresponding to an incidence 13.8/100 person-year-observation (95% CI:12.5-15.3) over 2,728 person years (PY) follow up. The main reasons for regimen modification were adverse effects (73.5%), especially lipodystrophy (63.2%) followed by rash (17.7%). Sixty three patients (17.1%) changed the regimen due to treatment failure. 2% and 19% of patients had HLA-B*35:05 and B*4001, respectively. HLA-B*35:05 was independently associated with rash-related regimen modification (aHR 7.73, 95% CI:3.16-18.9) while female gender was associated with lipodystrophy (aHR 2.11, 95% CI:1.51-2.95). Female gender (aHR 0.54, 95% CI: 0.30-0.96), elder age (aHR 0.56, 95% CI: 0.32-0.99) and having HLA-B*40:01 (aHR 0.29, 95% CI: 0.10-0.82) were protective for treatment failure related modification. Conclusion HLA-B*35:05 and female gender were strong predictors of regimen modification due to rash and lipodystrophy, respectively. Female gender, elder age, and having HLA-B*40:01 had protective effects on treatment failure-related regimen modification. This study provides further information of regimen modification for future tailored ART in Asia. Electronic supplementary material The online version of this article (doi:10.1186/s12879-014-0565-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Naho Tsuchiya
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, 1-12-4, Sakamoto, Nagasaki, 852-8523, Japan. .,Global COE program, Nagasaki University, 1-12-4, Sakamoto, Nagasaki, 852-8523, Japan.
| | - Panita Pathipvanich
- Day Care Center, Lampang Hospital, 280 Paholyothin Road, Muang Lampang, Lampang, 52000, Thailand.
| | - Nuanjun Wichukchinda
- National Institute of Health, Ministry of Public Health, 88/7 Tiwanon road, Ampur Muang, Nonthaburi, 11000, Thailand.
| | - Archawin Rojanawiwat
- National Institute of Health, Ministry of Public Health, 88/7 Tiwanon road, Ampur Muang, Nonthaburi, 11000, Thailand.
| | - Wattana Auwanit
- National Institute of Health, Ministry of Public Health, 88/7 Tiwanon road, Ampur Muang, Nonthaburi, 11000, Thailand.
| | - Koya Ariyoshi
- Department of Clinical Medicine, Institute of Tropical Medicine, Nagasaki University, 1-12-4, Sakamoto, Nagasaki, 852-8523, Japan. .,Global COE program, Nagasaki University, 1-12-4, Sakamoto, Nagasaki, 852-8523, Japan.
| | - Pathom Sawanpanyalert
- Food and Drug Administration, Ministry of Public Health, 88/7 Tiwanon road, Ampur Muang, Nonthaburi, 11000, Thailand.
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8
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Boonsathorn N, Panthong S, Koksunan S, Chittaganpitch M, Phuygun S, Waicharoen S, Prachasupap A, Sasaki T, Kubota-Koketsu R, Yasugi M, Ono KI, Arai Y, Kurosu T, Sawanpanyalert P, Ikuta K, Watanabe Y. A human monoclonal antibody derived from a vaccinated volunteer recognizes heterosubtypically a novel epitope on the hemagglutinin globular head of H1 and H9 influenza A viruses. Biochem Biophys Res Commun 2014; 452:865-70. [PMID: 25204499 DOI: 10.1016/j.bbrc.2014.09.008] [Citation(s) in RCA: 5] [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: 08/14/2014] [Accepted: 09/03/2014] [Indexed: 01/24/2023]
Abstract
Most neutralizing antibodies elicited during influenza virus infection or by vaccination have a narrow spectrum because they usually target variable epitopes in the globular head region of hemagglutinin (HA). In this study, we describe a human monoclonal antibody (HuMAb), 5D7, that was prepared from the peripheral blood lymphocytes of a vaccinated volunteer using the fusion method. The HuMAb heterosubtypically neutralizes group 1 influenza A viruses, including seasonal H1N1, 2009 pandemic H1N1 (H1N1pdm) and avian H9N2, with a strong hemagglutinin inhibition activity. Selection of an escape mutant showed that the HuMAb targets a novel conformational epitope that is located in the HA head region but is distinct from the receptor binding site. Furthermore, Phe114Ile substitution in the epitope made the HA unrecognizable by the HuMAb. Amino acid residues in the predicted epitope region are also highly conserved in the HAs of H1N1 and H9N2. The HuMAb reported here may be a potential candidate for the development of therapeutic/prophylactic antibodies against H1 and H9 influenza viruses.
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Affiliation(s)
- Naphatsawan Boonsathorn
- Medical Life Sciences Institute, Department of Medical Sciences, Ministry of Public Health, Muang, Nonthaburi, Thailand; Japan Science and Technology Agency/Japan International Cooperation Agency, Science and Technology Research Partnership for Sustainable Development (JST/JICA, SATREPS), Tokyo, Japan
| | - Sumolrat Panthong
- Medical Life Sciences Institute, Department of Medical Sciences, Ministry of Public Health, Muang, Nonthaburi, Thailand; Japan Science and Technology Agency/Japan International Cooperation Agency, Science and Technology Research Partnership for Sustainable Development (JST/JICA, SATREPS), Tokyo, Japan
| | - Sarawut Koksunan
- Medical Life Sciences Institute, Department of Medical Sciences, Ministry of Public Health, Muang, Nonthaburi, Thailand
| | - Malinee Chittaganpitch
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Muang, Nonthaburi, Thailand
| | - Siripaporn Phuygun
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Muang, Nonthaburi, Thailand
| | - Sunthareeya Waicharoen
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Muang, Nonthaburi, Thailand
| | - Apichai Prachasupap
- Medical Life Sciences Institute, Department of Medical Sciences, Ministry of Public Health, Muang, Nonthaburi, Thailand; Japan Science and Technology Agency/Japan International Cooperation Agency, Science and Technology Research Partnership for Sustainable Development (JST/JICA, SATREPS), Tokyo, Japan
| | - Tadahiro Sasaki
- Department of Virology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan; Japan Science and Technology Agency/Japan International Cooperation Agency, Science and Technology Research Partnership for Sustainable Development (JST/JICA, SATREPS), Tokyo, Japan
| | - Ritsuko Kubota-Koketsu
- Kanonji Institute, The Research Foundation for Microbial Diseases of Osaka University, Kanonji, Kagawa, Japan
| | - Mayo Yasugi
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Izumisano, Osaka, Japan
| | - Ken-Ichiro Ono
- Ina Laboratory, Medical & Biological Laboratories Corporation, Ltd., Ina, Nagano, Japan; Japan Science and Technology Agency/Japan International Cooperation Agency, Science and Technology Research Partnership for Sustainable Development (JST/JICA, SATREPS), Tokyo, Japan
| | - Yasuha Arai
- Department of Virology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan
| | - Takeshi Kurosu
- Department of Virology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan; Japan Science and Technology Agency/Japan International Cooperation Agency, Science and Technology Research Partnership for Sustainable Development (JST/JICA, SATREPS), Tokyo, Japan
| | - Pathom Sawanpanyalert
- Food and Drug Administration, Ministry of Public Health, Muang, Nonthaburi, Thailand
| | - Kazuyoshi Ikuta
- Department of Virology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan; Japan Science and Technology Agency/Japan International Cooperation Agency, Science and Technology Research Partnership for Sustainable Development (JST/JICA, SATREPS), Tokyo, Japan.
| | - Yohei Watanabe
- Department of Virology, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka, Japan; Japan Science and Technology Agency/Japan International Cooperation Agency, Science and Technology Research Partnership for Sustainable Development (JST/JICA, SATREPS), Tokyo, Japan.
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Khuntirat B, Yoon IK, Chittaganpitch M, Krueger WS, Supawat K, Blair PJ, Putnam SD, Gibbons RV, Buddhari D, Sawanpanyalert P, Heil GL, Friary JA, Gray GC. High rate of A(H1N1)pdm09 infections among rural Thai villagers, 2009-2010. PLoS One 2014; 9:e106751. [PMID: 25188434 PMCID: PMC4154756 DOI: 10.1371/journal.pone.0106751] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [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: 01/30/2014] [Accepted: 08/09/2014] [Indexed: 11/18/2022] Open
Abstract
Background Pandemic influenza A(H1N1)pdm09 emerged in Thailand in 2009. A prospective longitudinal adult cohort and household transmission study of influenza-like illness (ILI) was ongoing in rural Thailand at the time of emergence. Symptomatic and subclinical A(H1N1)pdm09 infection rates in the cohort and among household members were evaluated. Methods A cohort of 800 Thai adults underwent active community-based surveillance for ILI from 2008–2010. Acute respiratory samples from ILI episodes were tested for A(H1N1)pdm09 by qRT-PCR; acute and 60-day convalescent blood samples were tested by A(H1N1)pdm09 hemagglutination inhibition assay (HI). Enrollment, 12-month and 24-month follow-up blood samples were tested for A(H1N1)pdm09 seroconversion by HI. Household members of influenza A-infected cohort subjects with ILI were enrolled in household transmission investigations in which day 0 and 60 blood samples and acute respiratory samples were tested by either qRT-PCR or HI for A(H1N1)pdm09. Seroconversion between annual blood samples without A(H1N1)pdm09-positive ILI was considered as subclinical infection. Results The 2-yr cumulative incidence of A(H1N1)pdm09 infection in the cohort in 2009/2010 was 10.8% (84/781) with an annual incidence of 1.2% in 2009 and 9.7% in 2010; 83.3% of infections were subclinical (50% in 2009 and 85.9% in 2010). The 2-yr cumulative incidence was lowest (5%) in adults born ≤1957. The A(H1N1)pdm09 secondary attack rate among household contacts was 47.2% (17/36); 47.1% of these infections were subclinical. The highest A(H1N1)pdm09 secondary attack rate among household contacts (70.6%, 12/17) occurred among children born between 1990 and 2003. Conclusion Subclinical A(H1N1)pdm09 infections in Thai adults occurred frequently and accounted for a greater proportion of all A(H1N1)pdm09 infections than previously estimated. The role of subclinical infections in A(H1N1)pdm09 transmission has important implications in formulating strategies to predict and prevent the spread of A(H1N1)pdm09 and other influenza virus strains.
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Affiliation(s)
- Benjawan Khuntirat
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - In-Kyu Yoon
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | | | - Whitney S. Krueger
- College of Public Health and Health Professions and Emerging Pathogens Institute, University of Florida, Gainesville, Florida, United States of America
| | - Krongkaew Supawat
- National Institute of Health, Ministry of Public Health, Nonthaburi, Thailand
| | | | - Shannon D. Putnam
- Naval Health Research Center, San Diego, California, United States of America
| | - Robert V. Gibbons
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Darunee Buddhari
- Department of Virology, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | | | - Gary L. Heil
- College of Public Health and Health Professions and Emerging Pathogens Institute, University of Florida, Gainesville, Florida, United States of America
| | - John A. Friary
- College of Public Health and Health Professions and Emerging Pathogens Institute, University of Florida, Gainesville, Florida, United States of America
| | - Gregory C. Gray
- College of Public Health and Health Professions and Emerging Pathogens Institute, University of Florida, Gainesville, Florida, United States of America
- * E-mail:
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10
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Khuntirat BP, Yoon IK, Blair PJ, Krueger WS, Chittaganpitch M, Putnam SD, Supawat K, Gibbons RV, Pattamadilok S, Sawanpanyalert P, Heil GL, Friary JA, Capuano AW, Gray GC. Evidence for subclinical avian influenza virus infections among rural Thai villagers. Clin Infect Dis 2014; 53:e107-16. [PMID: 21921216 DOI: 10.1093/cid/cir525] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
BACKGROUND Regions of Thailand reported sporadic outbreaks of A/H5N1 highly pathogenic avian influenza (HPAI) among poultry between 2004 and 2008. Kamphaeng Phet Province, in north-central Thailand had over 50 HPAI poultry outbreaks in 2004 alone, and 1 confirmed and 2 likely other human HPAI infections between 2004 and 2006. METHODS In 2008, we enrolled a cohort of 800 rural Thai adults living in 8 sites within Kamphaeng Phet Province in a prospective study of zoonotic influenza transmission. We studied participants' sera with serologic assays against 16 avian, 2 swine, and 8 human influenza viruses. RESULTS Among participants (mean age 49.6 years and 58% female) 65% reported lifetime poultry exposure of at least 30 consecutive minutes. Enrollees had elevated antibodies by microneutralization assay against 3 avian viruses: A/Hong Kong/1073/1999(H9N2), A/Thailand/676/2005(H5N1), and A/Thailand/384/2006(H5N1). Bivariate risk factor modeling demonstrated that male gender, lack of an indoor water source, and tobacco use were associated with elevated titers against avian H9N2 virus. Multivariate modeling suggested that increasing age, lack of an indoor water source, and chronic breathing problems were associated with infection with 1 or both HPAI H5N1 strains. Poultry exposure was not associated with positive serologic findings. CONCLUSIONS These data suggest that people in rural central Thailand may have experienced subclinical avian influenza infections as a result of yet unidentified environmental exposures. Lack of an indoor water source may play a role in transmission.
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Affiliation(s)
- Benjawan P Khuntirat
- Department of Virology, US Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
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11
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Dang TN, Naka I, Sa-Ngasang A, Anantapreecha S, Chanama S, Wichukchinda N, Sawanpanyalert P, Patarapotikul J, Tsuchiya N, Ohashi J. A replication study confirms the association of GWAS-identified SNPs at MICB and PLCE1 in Thai patients with dengue shock syndrome. BMC Med Genet 2014; 15:58. [PMID: 24884822 PMCID: PMC4030448 DOI: 10.1186/1471-2350-15-58] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/02/2014] [Accepted: 05/12/2014] [Indexed: 12/02/2022]
Abstract
Background Dengue shock syndrome (DSS), a severe life-threatening form of dengue infection, mostly occurs in children. A recent genome wide association study (GWAS) identified two SNPs, rs3132468 of major histocompatibility complex class I polypeptide-related sequence B (MICB) and rs3765524 of phospholipase C, epsilon 1 (PLCE1), associated with DSS in Vietnamese children. In this study, to examine whether an identical association is found in a different population, the association of these two SNPs with DSS was assessed in Thai children with dengue. Methods The rs3132468 and rs3765524 SNPs were genotyped in 917 Thai children with dengue: 76 patients with DSS and 841 patients with non-DSS. The allele frequencies were compared between DSS and non-DSS groups by one-sided Fisher’s exact test. The association of rs3132468 and rs3765524 with the mRNA expression levels of MICB and PLCE1 were assessed in EBV-transformed lymphoblastoid cell lines. Results The reported DSS-risk alleles were significantly associated with DSS in Thai patients with dengue (one-sided P = 0.0213 and odds ratio [OR] = 1.58 for rs3132468-C and one-sided P = 0.0252 and OR = 1.49 for rs3765524-C). The rs3132468-C allele showed a significant association with lower mRNA level of MICB (P = 0.0267), whereas the rs3765524-C allele did not. These results imply that the MICB molecule may play an important role in the prevention of DSS in dengue infection. Conclusions Together with previous association studies, we conclude that rs3132468-C at MICB and rs3765524-C at PLCE1 confer risk of DSS in Southeast Asians.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - Jun Ohashi
- Faculty of Medicine, University of Tsukuba, Tsukuba, Japan.
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12
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Pathipvanich P, Tsuchiya N, Rojanawiwat A, Schmidt WP, Auwanit W, Sawanpanyalert P, Ariyoshi K. Changing burden of HIV/AIDS to clinical settings in Northern Thailand over 15 years. Jpn J Infect Dis 2014; 66:375-8. [PMID: 24047733 DOI: 10.7883/yoken.66.375] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
We conducted a hospital-based descriptive study to describe the changing pattern of patient numbers, characteristics, and mortality rates among human immunodeficiency virus (HIV)-infected patients in northern Thailand over 15 years. The survival status on October 31, 2010 of all HIV-infected adults who attended an HIV center in a government hospital between 1995 and 2010 was ascertained. In total, 3,706 patients were registered, 2,118 (57.2%) of which were male. The survival status of 3,439 patients (92.9%) was available. In addition, 1,543 deaths were identified out of 12,858 person-year-observations (PYO) resulting in a mortality rate of 12.4 deaths/100 PYO (95% confidence interval [CI], 11.3-13.0). An initial decline in mortality rates was observed prior to 1999, probably because of an increase in the proportion of less symptomatic patients. After the introduction of the national highly active antiretroviral therapy (HAART) program, a profound decline in mortality rates was observed, reaching 2.0 deaths/100 PYO (95% CI, 1.4-2.9) in 2010. Simultaneously, the number of patients on follow-up increased by nearly fourfold. Although HAART has drastically improved the survival of HIV-infected patients, the number of patients receiving therapy at this HIV clinic has substantially increased. While referral of HIV patients to general physicians' care should be urged, we cannot overemphasize the importance of preventing new HIV infections.
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Wangroongsarb P, Kohda T, Jittaprasartsin C, Suthivarakom K, Kamthalang T, Umeda K, Sawanpanyalert P, Kozaki S, Ikuta K. Molecular characterization of Clostridium botulinum isolates from foodborne outbreaks in Thailand, 2010. PLoS One 2014; 9:e77792. [PMID: 24475015 PMCID: PMC3903786 DOI: 10.1371/journal.pone.0077792] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [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: 03/20/2013] [Accepted: 09/04/2013] [Indexed: 12/18/2022] Open
Abstract
Background Thailand has had several foodborne outbreaks of botulism, one of the biggest being in 2006 when laboratory investigations identified the etiologic agent as Clostridium botulinum type A. Identification of the etiologic agent from outbreak samples is laborious using conventional microbiological methods and the neurotoxin mouse bioassay. Advances in molecular techniques have added enormous information regarding the etiology of outbreaks and characterization of isolates. We applied these methods in three outbreaks of botulism in Thailand in 2010. Methodology/Principal Findings A total of 19 cases were involved (seven each in Lampang and Saraburi and five in Maehongson provinces). The first outbreak in Lampang province in April 2010 was associated with C. botulinum type F, which was detected by conventional methods. Outbreaks in Saraburi and Maehongson provinces occurred in May and December were due to C. botulinum type A1(B) and B that were identified by conventional methods and molecular techniques, respectively. The result of phylogenetic sequence analysis showed that C. botulinum type A1(B) strain Saraburi 2010 was close to strain Iwate 2007. Molecular analysis of the third outbreak in Maehongson province showed C. botulinum type B8, which was different from B1–B7 subtype. The nontoxic component genes of strain Maehongson 2010 revealed that ha33, ha17 and botR genes were close to strain Okra (B1) while ha70 and ntnh genes were close to strain 111 (B2). Conclusion/Significance This study demonstrates the utility of molecular genotyping of C. botulinum and how it contributes to our understanding the epidemiology and variation of boNT gene. Thus, the recent botulism outbreaks in Thailand were induced by various C. botulinum types.
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Affiliation(s)
- Piyada Wangroongsarb
- Department of Medical Sciences, National Institute of Health, Nonthaburi, Thailand
| | - Tomoko Kohda
- Department of Veterinary Science, Osaka Prefecture University, Osaka, Japan
| | | | - Karun Suthivarakom
- Department of Medical Sciences, National Institute of Health, Nonthaburi, Thailand
| | - Thanitchi Kamthalang
- Department of Medical Sciences, National Institute of Health, Nonthaburi, Thailand
| | - Kaoru Umeda
- Department of Microbiology, Osaka City Institute of Public Health and Environmental Sciences, Osaka, Japan
| | | | - Shunji Kozaki
- Department of Veterinary Science, Osaka Prefecture University, Osaka, Japan
| | - Kazuyoshi Ikuta
- Department of Virology, Osaka University, Osaka, Japan
- * E-mail:
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14
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Sa-Ngasang A, Ohashi J, Naka I, Anantapreecha S, Sawanpanyalert P, Patarapotikul J. Association of IL1B -31C/T and IL1RA variable number of an 86-bp tandem repeat with dengue shock syndrome in Thailand. J Infect Dis 2014; 210:138-45. [PMID: 24446526 DOI: 10.1093/infdis/jiu042] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Dengue patients present a range of symptoms: dengue fever (DF), dengue hemorrhagic fever (DHF), and dengue shock syndrome (DSS). It is not clear whether this variability is due to their genetic background. Here we tested polymorphisms of interleukin 1 beta (IL1B) and interleukin 1 receptor antagonist (IL1RA) genes for association with DSS in the Thai population. METHODS Polymorphisms of IL1B -31C/T (rs1143627) and IL1RA 86-base-pair tandem repeat were analyzed in 871 patients (DF = 384, DHF = 413, and DSS = 74). RESULTS IL1B -31C and IL1RA 2/4 genotype were associated with DSS (IL1B -31C: DSS vs DHF: P = .0061, odds ratio [OR, 95% confidence interval {CI}], 3.49 [1.36-8.95]; DSS vs DF: P = .027, OR [95% CI], 2.81 [1.12-7.06]; IL1RA 2/4: DSS vs DHF: P = .017, OR [95% CI], 1.94 [1.12-3.40]; DSS vs DF: P = .024, OR [95% CI], 1.90 [1.07-3.4]). No difference was found between DF and DHF. Logistic regression analysis revealed that IL1B -31C and IL1RA 2/4 genotypes were each independently associated with DSS. CONCLUSIONS Patients with IL1B -31C carrier, or IL1RA 2/4 genotype carry a risk for DSS, implying that IL1B may play a role in pathogenesis of DSS.
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Krueger WS, Khuntirat B, Yoon IK, Blair PJ, Chittagarnpitch M, Putnam SD, Supawat K, Gibbons RV, Bhuddari D, Pattamadilok S, Sawanpanyalert P, Heil GL, Gray GC. Prospective study of avian influenza virus infections among rural Thai villagers. PLoS One 2013; 8:e72196. [PMID: 23977250 PMCID: PMC3745375 DOI: 10.1371/journal.pone.0072196] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [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: 05/22/2013] [Accepted: 07/07/2013] [Indexed: 11/18/2022] Open
Abstract
Background In 2008, 800 rural Thai adults living within Kamphaeng Phet Province were enrolled in a prospective cohort study of zoonotic influenza transmission. Serological analyses of enrollment sera suggested this cohort had experienced subclinical avian influenza virus (AIV) infections with H9N2 and H5N1 viruses. Methods After enrollment, participants were contacted weekly for 24mos for acute influenza-like illnesses (ILI). Cohort members confirmed to have influenza A infections were enrolled with their household contacts in a family transmission study involving paired sera and respiratory swab collections. Cohort members also provided sera at 12 and 24 months after enrollment. Serologic and real-time RT-PCR assays were performed against avian, swine, and human influenza viruses. Results Over the 2 yrs of follow-up, 81 ILI investigations in the cohort were conducted; 31 (38%) were identified as influenza A infections by qRT-PCR. Eighty-three household contacts were enrolled; 12 (14%) reported ILIs, and 11 (92%) of those were identified as influenza infections. A number of subjects were found to have slightly elevated antibodies against avian-like A/Hong Kong/1073/1999(H9N2) virus: 21 subjects (2.7%) at 12-months and 40 subjects (5.1%) at 24-months. Among these, two largely asymptomatic acute infections with H9N2 virus were detected by >4-fold increases in annual serologic titers (final titers 1∶80). While controlling for age and influenza vaccine receipt, moderate poultry exposure was significantly associated with elevated H9N2 titers (adjusted OR = 2.3; 95% CI, 1.04–5.2) at the 24-month encounter. One subject had an elevated titer (1∶20) against H5N1 during follow-up. Conclusions From 2008–10, evidence for AIV infections was sparse among this rural population. Subclinical H9N2 AIV infections likely occurred, but serological results were confounded by antibody cross-reactions. There is a critical need for improved serological diagnostics to more accurately detect subclinical AIV infections in humans.
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Affiliation(s)
- Whitney S. Krueger
- College of Public Health and Health Professions and Emerging Pathogens Institute, University of Florida, Gainesville, Florida, United States of America
| | - Benjawan Khuntirat
- US Army Medical Component - Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - In-Kyu Yoon
- US Army Medical Component - Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Patrick J. Blair
- Naval Medical Research Unit 2 and Office of Defense Cooperation, Singapore
| | | | - Shannon D. Putnam
- Naval Health Research Center, San Diego, California, United States of America
| | - Krongkaew Supawat
- National Institute of Health, Ministry of Public Health, Bangkok, Thailand
| | - Robert V. Gibbons
- US Army Medical Component - Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | - Darunee Bhuddari
- US Army Medical Component - Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand
| | | | | | - Gary L. Heil
- College of Public Health and Health Professions and Emerging Pathogens Institute, University of Florida, Gainesville, Florida, United States of America
| | - Gregory C. Gray
- College of Public Health and Health Professions and Emerging Pathogens Institute, University of Florida, Gainesville, Florida, United States of America
- * E-mail:
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16
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Rhodes J, Dejsirilert S, Maloney SA, Jorakate P, Kaewpan A, Salika P, Akarachotpong T, Prapasiri P, Naorat S, Areerat P, Ruayajin A, Sawanpanyalert P, Akarasewi P, Peruski LF, Baggett HC. Pneumococcal Bacteremia Requiring Hospitalization in Rural Thailand: An Update on Incidence, Clinical Characteristics, Serotype Distribution, and Antimicrobial Susceptibility, 2005-2010. PLoS One 2013; 8:e66038. [PMID: 23840395 PMCID: PMC3694083 DOI: 10.1371/journal.pone.0066038] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [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: 01/24/2013] [Accepted: 04/30/2013] [Indexed: 11/21/2022] Open
Abstract
Background Streptococcus pneumoniae is an important cause of morbidity and mortality in Southeast Asia, but regional data is limited. Updated burden estimates are critical as pneumococcal conjugate vaccine (PCV) is highly effective, but not yet included in the Expanded Program on Immunization of Thailand or neighboring countries. Methods We implemented automated blood culture systems in two rural Thailand provinces as part of population-based surveillance for bacteremia. Blood cultures were collected from hospitalized patients as clinically indicated. Results From May 2005– March 2010, 196 cases of pneumococcal bacteremia were confirmed in hospitalized patients. Of these, 57% had clinical pneumonia, 20% required mechanical ventilation, and 23% (n = 46) died. Antibiotic use before blood culture was confirmed in 25% of those with blood culture. Annual incidence of hospitalized pneumococcal bacteremia was 3.6 per 100,000 person-years; rates were higher among children aged <5 years at 11.7 and adults ≥65 years at 14.2, and highest among infants <1 year at 33.8. The median monthly case count was higher during December–March compared to the rest of the year 6.0 vs. 1.0 (p<0.001). The most common serotypes were 23F (16%) and 14 (14%); 61% (74% in patients <5 years) were serotypes in the 10-valent PCV (PCV 10) and 82% (92% in <5 years) in PCV 13. All isolates were sensitive to penicillin, but non-susceptibility was high for co-trimoxazole (57%), erythromycin (30%), and clindamycin (20%). Conclusions We demonstrated a high pneumococcal bacteremia burden, yet underestimated incidence because we captured only hospitalized cases, and because pre-culture antibiotics were frequently used. Our findings together with prior research indicate that PCV would likely have high serotype coverage in Thailand. These findings will complement ongoing cost effectiveness analyses and support vaccine policy evaluation in Thailand and the region.
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Affiliation(s)
- Julia Rhodes
- International Emerging Infections Program, Global Disease Detection Regional Center, Thailand Ministry of Public Health – United States Centers for Disease Control and Prevention Collaboration, Nonthaburi, Thailand
- * E-mail:
| | - Surang Dejsirilert
- National Institute of Health, Ministry of Public Health, Nonthaburi, Thailand
| | - Susan A. Maloney
- International Emerging Infections Program, Global Disease Detection Regional Center, Thailand Ministry of Public Health – United States Centers for Disease Control and Prevention Collaboration, Nonthaburi, Thailand
| | - Possawat Jorakate
- International Emerging Infections Program, Global Disease Detection Regional Center, Thailand Ministry of Public Health – United States Centers for Disease Control and Prevention Collaboration, Nonthaburi, Thailand
| | - Anek Kaewpan
- International Emerging Infections Program, Global Disease Detection Regional Center, Thailand Ministry of Public Health – United States Centers for Disease Control and Prevention Collaboration, Nonthaburi, Thailand
| | - Prasert Salika
- International Emerging Infections Program, Global Disease Detection Regional Center, Thailand Ministry of Public Health – United States Centers for Disease Control and Prevention Collaboration, Nonthaburi, Thailand
| | - Thantapat Akarachotpong
- International Emerging Infections Program, Global Disease Detection Regional Center, Thailand Ministry of Public Health – United States Centers for Disease Control and Prevention Collaboration, Nonthaburi, Thailand
| | - Prabda Prapasiri
- International Emerging Infections Program, Global Disease Detection Regional Center, Thailand Ministry of Public Health – United States Centers for Disease Control and Prevention Collaboration, Nonthaburi, Thailand
| | - Sathapana Naorat
- International Emerging Infections Program, Global Disease Detection Regional Center, Thailand Ministry of Public Health – United States Centers for Disease Control and Prevention Collaboration, Nonthaburi, Thailand
| | - Peera Areerat
- Nakhon Phanom Provincial Health Office, Nakhon Phanom, Thailand
| | | | | | | | - Leonard F. Peruski
- International Emerging Infections Program, Global Disease Detection Regional Center, Thailand Ministry of Public Health – United States Centers for Disease Control and Prevention Collaboration, Nonthaburi, Thailand
| | - Henry C. Baggett
- International Emerging Infections Program, Global Disease Detection Regional Center, Thailand Ministry of Public Health – United States Centers for Disease Control and Prevention Collaboration, Nonthaburi, Thailand
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Ampofo WK, Al Busaidy S, Cox NJ, Giovanni M, Hay A, Huang S, Inglis S, Katz J, Mokhtari-Azad T, Peiris M, Savy V, Sawanpanyalert P, Venter M, Waddell AL, Wickramasinghe G, Zhang W, Ziegler T. Strengthening the influenza vaccine virus selection and development process: outcome of the 2nd WHO Informal Consultation for Improving Influenza Vaccine Virus Selection held at the Centre International de Conférences (CICG) Geneva, Switzerland, 7 to 9 December 2011. Vaccine 2013; 31:3209-21. [PMID: 23685246 DOI: 10.1016/j.vaccine.2013.05.049] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 05/13/2013] [Accepted: 05/13/2013] [Indexed: 10/26/2022]
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Thattiyaphong A, Okada K, Khangrang S, Nispa W, Sawanpanyalert P, Honda T. Development of a 5-minute rapid test for detecting Vibrio cholerae O139. Southeast Asian J Trop Med Public Health 2013; 44:448-455. [PMID: 24050076] [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] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Vibrio cholerae O139 is an etiology of cholera in Thailand. We determined to prepare a rapid test to detect V cholerae O139 using an immunochromatographic method to be used for surveillance and use in community laboratories. We conjugated murine monoclonal antibodies specific to the lipopolysaccharide of V. cholerae O139 with colloidal gold particles. The sensitivity of the test was determined using 10-fold dilutions of V. cholerae O139. The lowest number of bacterial cells detected by the test was 10(6) cfu/ml. The specificity was determined using 51 isolates of pure cultures, including V. cholerae serogroups O1, O139, and non-O1/non-O139 and other enteric bacteria; 27 rectal swab specimens and 100 specimens of enriched alkaline peptone water, 50 of which contained V. cholerae O1 and the other did not contain V. cholerae O1. The rapid test showed specificity to V cholerae O139 and no cross reaction with V cholerae O1, V. cholerae non-O1/ non-O139, and other enteric bacteria. The test is rapid, simple and easy to use.
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Affiliation(s)
- A Thattiyaphong
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand.
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Aarestrup FM, Brown EW, Detter C, Gerner-Smidt P, Gilmour MW, Harmsen D, Hendriksen RS, Hewson R, Heymann DL, Johansson K, Ijaz K, Keim PS, Koopmans M, Kroneman A, Lo Fo Wong D, Lund O, Palm D, Sawanpanyalert P, Sobel J, Schlundt J. Integrating genome-based informatics to modernize global disease monitoring, information sharing, and response. Emerg Infect Dis 2013; 18:e1. [PMID: 23092707 PMCID: PMC3559169 DOI: 10.3201/eid/1811.120453] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The rapid advancement of genome technologies holds great promise for improving the quality and speed of clinical and public health laboratory investigations and for decreasing their cost. The latest generation of genome DNA sequencers can provide highly detailed and robust information on disease-causing microbes, and in the near future these technologies will be suitable for routine use in national, regional, and global public health laboratories. With additional improvements in instrumentation, these next- or third-generation sequencers are likely to replace conventional culture-based and molecular typing methods to provide point-of-care clinical diagnosis and other essential information for quicker and better treatment of patients. Provided there is free-sharing of information by all clinical and public health laboratories, these genomic tools could spawn a global system of linked databases of pathogen genomes that would ensure more efficient detection, prevention, and control of endemic, emerging, and other infectious disease outbreaks worldwide.
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Sapsutthipas S, Tsuchiya N, Pathipavanich P, Ariyoshi K, Sawanpanyalert P, Takeda N, Isarangkura-na-ayuthaya P, Kameoka M. CRF01_AE-specific neutralizing activity observed in plasma derived from HIV-1-infected Thai patients residing in northern Thailand: comparison of neutralizing breadth and potency between plasma derived from rapid and slow progressors. PLoS One 2013; 8:e53920. [PMID: 23308290 PMCID: PMC3538751 DOI: 10.1371/journal.pone.0053920] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [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: 09/06/2012] [Accepted: 12/04/2012] [Indexed: 11/25/2022] Open
Abstract
Background Development of a protective vaccine against human immunodeficiency virus type 1 (HIV-1) is an important subject in the field of medical sciences; however, it has not yet been achieved. Potent and broadly neutralizing antibodies are found in the plasma of some HIV-1-infected patients, whereas such antibody responses have failed to be induced by currently used vaccine antigens. In order to develop effective vaccine antigens, it is important to reveal the molecular mechanism of how strong humoral immune responses are induced in infected patients. As part of such studies, we examined the correlation between the anti-HIV-1 neutralizing antibody response and disease progression. Methodology/Principal Findings We evaluated the anti-HIV-1 neutralizing activity of plasma derived from 33 rapid and 34 slow progressors residing in northern Thailand. The level of neutralizing activity varied considerably among plasmas, and no statistically significant differences in the potency and breadth of neutralizing activities were observed overall between plasma derived from rapid and slow progressors; however, plasma of 4 slow progressors showed neutralizing activity against all target viruses, whereas none of the plasma of rapid progressors showed such neutralizing activity. In addition, 21% and 9% of plasmas derived from slow and rapid progressors inhibited the replication of more than 80% of CRF01_AE Env-recombinant viruses tested, respectively. Neutralization of subtype B and C Env-recombinant viruses by the selected plasma was also examined; however, these plasma samples inhibited the replication of only a few viruses tested. Conclusions/Significance Although no statistically significant differences were observed in the potency and breadth of anti-HIV-1 neutralizing activities between plasma derived from rapid and slow progressors, several plasma samples derived from slow progressors neutralized CRF01_AE Env-recombinant viruses more frequently than those from rapid progressors. In addition, plasma derived from HIV-1-infected Thai patients showed CRF01_AE-specific neutralizing activity.
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Affiliation(s)
- Sompong Sapsutthipas
- Thailand-Japan Research Collaboration Center on Emerging and Re-emerging Infections (RCC-ERI), Nonthaburi, Thailand
| | - Naho Tsuchiya
- Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | | | - Koya Ariyoshi
- Institute of Tropical Medicine, Nagasaki University, Nagasaki, Japan
| | - Pathom Sawanpanyalert
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Naokazu Takeda
- Thailand-Japan Research Collaboration Center on Emerging and Re-emerging Infections (RCC-ERI), Nonthaburi, Thailand
- Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | | | - Masanori Kameoka
- Thailand-Japan Research Collaboration Center on Emerging and Re-emerging Infections (RCC-ERI), Nonthaburi, Thailand
- Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
- Department of International Health, Kobe University Graduate School of Health Sciences, Hyogo, Japan
- * E-mail:
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Rudeeaneksin J, Bunchoo S, Srisungngam S, Sawanpanyalert P, Chamnangrom S, Kamolwat A, Thanasripakdeekul P, Taniguchi T, Nakajima C, Suzuki Y, Phetsuksiri B. Rapid identification of Mycobacterium tuberculosis in BACTEC MGIT960 cultures by in-house loop-medicated isothermal amplification. Jpn J Infect Dis 2012; 65:306-11. [PMID: 22814152 DOI: 10.7883/yoken.65.306] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Definitive diagnosis of tuberculosis (TB) by conventional culture, followed by bacterial identification based on biochemical tests is time-consuming and tedious. Simple loop-mediated isothermal amplification (LAMP) specific for Mycobacterium tuberculosis complex, targeting the M. tuberculosis 16S ribosomal RNA gene, termed TB-LAMP, was evaluated as an alternative for rapid culture confirmation. TB-LAMP was assessed for its ability to detect M. tuberculosis complex in BACTEC MGIT 960-positive cultures. Of the 103 cultures evaluated, 100 were identified to contain M. tuberculosis complex by TB-LAMP and had concordant results with standard biochemical tests of niacin accumulation, nitrate reductase, lack of heat-stable catalase, and susceptibility to para-nitrobenzoic acid. These results indicate that TB-LAMP in combination with BACTEC MGIT 960 is a specific, reliable, and technically feasible method for rapid and accurate identification of M. tuberculosis complex.
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Affiliation(s)
- Janisara Rudeeaneksin
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
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Aarestrup FM, Brown EW, Detter C, Gerner-Smidt P, Gilmour MW, Harmsen D, Hendriksen RS, Hewson R, Heymann DL, Johansson K, Ijaz K, Keim PS, Koopmans M, Kroneman A, Wong DLF, Lund O, Palm D, Sawanpanyalert P, Sobel J, Schlundt J. Integrating Genome-based Informatics to Modernize Global Disease Monitoring, Information Sharing, and Response. Emerg Infect Dis 2012. [DOI: 10.3201/eid1811.120453] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
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Puiprom O, Chantaroj S, Matsuda S, Sawanpanyalert P, Honda T, Iida T, Taniguchi T. Immune response in diarrheal patients and asymptomatic carrier with CS6-producing enterotoxigenic Escherichia coli infection. Southeast Asian J Trop Med Public Health 2012; 43:1452-1460. [PMID: 23413709] [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] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Enterotoxigenic Escherichia coli (ETEC) is one of the major causes of diarrhea in children and travelers in developing countries. ETEC colonization factors (CFs) are virulence determinants considered as protective antigens and major targets for vaccine development against ETEC infections. One of the most prevalent CFs, coli surface antigen 6 (CS6), a non-fimbrial polymeric protein consisting of two major subunits, CssA and CssB, is produced by approximately 25-35% of ETEC worldwide. We could isolate only CS6-producing ETEC strains from two diarrheal patients and one asymptomatic carrier, but we could not detect CssA- or CssB-specific antibodies in the feces and blood of two patients convalescing from natural ETEC infection and of an asymptomatic carrier using western blotting. Therefore, in order to protect against infection with CS6-producing ETEC, protective levels of CS6 immunity should be incorporated in any future vaccines against ETEC.
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Affiliation(s)
- Orapim Puiprom
- Section of Bacterial Infections, Thailand-Japan Research Collaboration Center on Emerging and Re-emerging Infections (RCC-ERI), Nonthaburi, Thailand.
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Ungchusak K, Sawanpanyalert P, Hanchoworakul W, Sawanpanyalert N, Maloney SA, Brown RC, Birmingham ME, Chusuttiwat S. Lessons learned from influenza A(H1N1)pdm09 pandemic response in Thailand. Emerg Infect Dis 2012; 18:1058-64. [PMID: 22709628 PMCID: PMC3376790 DOI: 10.3201/eid1807.110976] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [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] [Indexed: 11/21/2022] Open
Abstract
The strengths and weaknesses of this response can inform planning for pandemics and other prolonged public health emergencies. In 2009, Thailand experienced rapid spread of the pandemic influenza A(H1N1)pdm09 virus. The national response came under intense public scrutiny as the number of confirmed cases and associated deaths increased. Thus, during July–December 2009, the Ministry of Public Health and the World Health Organization jointly reviewed the response efforts. The review found that the actions taken were largely appropriate and proportionate to need. However, areas needing improvement were surveillance, laboratory capacity, hospital infection control and surge capacity, coordination and monitoring of guidelines for clinical management and nonpharmaceutical interventions, risk communications, and addressing vulnerabilities of non-Thai displaced and migrant populations. The experience in Thailand may be applicable to other countries and settings, and the lessons learned may help strengthen responses to other pandemics or comparable prolonged public health emergencies.
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Affiliation(s)
- Kumnuan Ungchusak
- Bureau of Epidemiology, Department of Disease Control, Ministry of Public Health, Nonthaburi, Thailand.
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Sriwanthana B, Mori M, Tanaka M, Nishimura S, Miura T, Pathipvanich P, Sawanpanyalert P, Ariyoshi K. The effect of HLA polymorphisms on the recognition of Gag epitopes in HIV-1 CRF01_AE infection. PLoS One 2012; 7:e41696. [PMID: 22848569 PMCID: PMC3407236 DOI: 10.1371/journal.pone.0041696] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [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: 03/29/2012] [Accepted: 06/25/2012] [Indexed: 11/21/2022] Open
Abstract
Introduction The design of a globally effective vaccine rests on the identification of epitopes capable of eliciting effective cytotoxic T lymphocyte (CTL) responses across multiple HIV clades in different populations. This study aims to discern the effect of HLA polymorphisms and the cross-clade reactivity or clade-specificity of epitopes in Thailand where HIV-1 CRF01_AE is circulating. Materials and Methods 14 peptides based on consensus HIV-1 CRF01_AE amino acid sequences were designed for use in IFN-γ ELISpot assays and 51Cr release assays among 66 HIV-1 CRF01_AE-infected Thai patients. For ELISpot responders carrying HLA alleles currently unknown to restrict CRF01_AE epitopes, in silico epitope-HLA prediction was performed. Results 29/66 (43.9%) patients recognized at least one peptide. In total 79 responses were seen against all 14 peptides. 28/79 (35.4%) of the responses were in patients with HLA alleles previously reported to restrict CRF01_AE epitopes, 24/79 (30.4%) responses were in individuals with HLA alleles previously reported to restrict epitopes of HIV clades other than CRF01_AE, and the remaining 27/79 (34.2%) responses were not associated with HLA alleles previously known to restrict HIV epitopes. In silico epitope prediction detected 19 novel, epitope-HLA combinations, and 11/19 (57.9%) were associated with HLA-C alleles. We further confirmed a novel HLA restriction of a previously identified HIV-1 Gag epitope [p24122–130: PPIPVGDIY (PY9)] by HLA-B*40:01 with a standard 51Cr release assay. Discussion CTL recognition sites in HIV-1 Gag were similar among different clades but the HLA restriction differed in Thai patients. This disparity in HLA restriction along different populations illustrated the importance of clade- and population-specific HLA analysis prior to CTL vaccine design.
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Affiliation(s)
| | - Masahiko Mori
- Institute of Tropical Medicine, Nagasaki University, Nagasaki city, Nagasaki, Japan
- Department of Paediatrics, The Peter Medawar Building for Pathogen Research, University of Oxford, Oxford, United Kingdom
| | - Mari Tanaka
- Institute of Tropical Medicine, Nagasaki University, Nagasaki city, Nagasaki, Japan
| | - Sei Nishimura
- Institute of Tropical Medicine, Nagasaki University, Nagasaki city, Nagasaki, Japan
| | - Toshiyuki Miura
- Advanced Clinical Research Centre, Institute of Medical Science, University of Tokyo, Minato-ku, Tokyo, Japan
| | | | | | - Koya Ariyoshi
- Institute of Tropical Medicine, Nagasaki University, Nagasaki city, Nagasaki, Japan
- * E-mail:
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Pattamadilok S, Incomserb P, Primsirikunawut A, Lukebua A, Rota PA, Sawanpanyalert P. Genetic characterization of measles viruses that circulated in Thailand from 1998 to 2008. J Med Virol 2012; 84:804-13. [PMID: 22431030 DOI: 10.1002/jmv.23249] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
During the period between 1998 and 2008, 48 representative measles viruses (MeVs) circulating in Thailand were subjected to genetic characterization. Three genotypes, G2, D5, and D9 were detected. The results suggested that measles genotype D5, which has been circulating since at least 1998, is the endemic genotype in Thailand. Genotype G2 was detected between 1998 and 2001. In addition, almost all of the MeVs detected throughout the country in 2008 were genotype D9. This is the first report of genotype D9 in Thailand. This report provides important baseline data about measles genotypes in Thailand and this information will be needed to help verify measles elimination in Thailand.
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Affiliation(s)
- Sirima Pattamadilok
- National Institute of Health, Department of Medical Sciences, Nonthaburi, Thailand.
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Sapsutthipas S, Tsuchiya N, Pathipavanich P, Ariyoshi K, Sawanpanyalert P, Israngkura-na-ayuthaya P, Kameoka M. Comparison of anti-HIV-1 neutralizing activity between the plasma derived from HIV-1 infected, slow and rapid progressors. Int J Infect Dis 2012. [DOI: 10.1016/j.ijid.2012.05.760] [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] [Indexed: 11/26/2022] Open
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Khuntirat B, Yoon IK, Krueger W, Chittaganrnpitch M, Supawat K, Blair P, Putnam S, Gibbons R, Sawanpanyalert P, Heil G, Friary J, Gray G. Pandemic influenza A (H1N1) virus infections among villagers living in rural Thailand. Int J Infect Dis 2012. [DOI: 10.1016/j.ijid.2012.05.424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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Mahasirimongkol S, Yanai H, Mushiroda T, Promphittayarat W, Wattanapokayakit S, Phromjai J, Yuliwulandari R, Wichukchinda N, Yowang A, Yamada N, Kantipong P, Takahashi A, Kubo M, Sawanpanyalert P, Kamatani N, Nakamura Y, Tokunaga K. Genome-wide association studies of tuberculosis in Asians identify distinct at-risk locus for young tuberculosis. J Hum Genet 2012; 57:363-7. [PMID: 22551897 DOI: 10.1038/jhg.2012.35] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Tuberculosis (TB) is one of the most devastating chronic infectious diseases, but the role of host genetics in disease development after infection in this disease remains unidentified. Genome-wide association studies (GWASs) in Thais and Japanese were carried out and separately analyzed, attempted replication, then, combined by meta-analysis were not yielding any convincing association evidences; these results suggested that moderate to high effect-size genetic risks are not existed for TB per se. Because of failure in replication attempt of the top 50 single-nucleotide polymorphisms (SNPs) identified form meta-analysis data, we empirically split TB cases into young TB case/control data sets (GWAS-T(young)=137/295 and GWAS-J(young)=60/249) and old TB case/control data sets (GWAS-T(old)=300/295 and GWAS-J(old)=123/685), re-analyzed GWAS based on age-stratified data and replicated the significant findings in two independent replication samples (young TB; Rep-T(young)=155/249, Rep-J(young)=41/462 and old TB; Rep-T(old)=212/187, Rep-J(old)=71/619). GWAS and replication studies conducted in young TB identified at-risk locus in 20q12. Although the locus is located in inter-genic region, the nearest genes (HSPEP1-MAFB) from this locus are promising candidates for TB susceptibility. This locus was also associated with anti-TNF responsiveness, drug with increased susceptibility for TB. Moreover, eight SNPs in an old TB meta-analysis and six SNPs in young TB meta-analysis provided replication evidences but did not survive genome-wide significance.These findings suggest that host genetic risks for TB are affected by age at onset of TB, and this approach may accelerate the identification of the major host factors that affect TB in human populations.
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Affiliation(s)
- Surakameth Mahasirimongkol
- Medical Genetics Section, National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand.
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30
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Boonsathorn N, Kanai Y, Punjumpa J, Bai G, Chittaganpitch M, Petphuwadee U, Jampangern W, Sawanpanyalert P, Ikuta K, Teerasut C. Neutralization titers against influenza A (H3N2) and influenza B viruses among a non-vaccinated population from Thailand. Southeast Asian J Trop Med Public Health 2012; 43:674-679. [PMID: 23077847] [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] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Influenza A and B viruses are viral respiratory pathogens that can cause severe infections among birds and mammals. Neutralization assays using human sera are useful to evaluate the risk of circulating viruses to humans. In this study, 359 serum samples from healthy Thai volunteers, who had not been vaccinated against influenza for at least five years, were investigated by microneutralization (MN) assays against influenza A H3N2 and influenza B viruses in 2009. There was no significant difference in neutralization activities against 2006 and 2008 isolates of influenza A H3N2 viruses. However, neutralization titers to influenza B viruses among 2008 isolates were quite low. The results indicate the non-vaccinated study population had some neutralizing antibodies against influenza A H3N2 but not against influenza B viruses.
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Affiliation(s)
- Napasawan Boonsathorn
- Medical Biotechnology Center, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
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Teerasut C, Lei HY, Natthakorn K, Jittmittraphap A, Thammapalo S, Witayathawornwong P, Lin YT, Jarman RG, Sawanpanyalert P, Jampangern W, Limkittikul K. The serotype-independent but concentration-dependent enhancing antibodies among Thai dengue patients. Southeast Asian J Trop Med Public Health 2012; 43:624-633. [PMID: 23077841] [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] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Antibody-dependent enhancement of infection (ADE) is central to explaining the development of severe disease at the end of post-dengue virus infection. Non-neutralizing anti-dengue antibodies bound to the dengue virion enhances the virus entrance into the target cells via the Fc receptor. The titer of enhancing antibodies in dengue patients is not determined during dengue virus infection. Sensitive flow cytometry detecting dengue virus-infected K562 cells was used to quantitate enhancing activity among Thai DF and DHF patients against four serotypes and the patient's dengue isolate. The titer was defined as the reciprocal of the final dilution that loses enhancing activity. The serum of Thai patients confirmed to have dengue infection were found to have high titers of enhancing antibodies and increased gradually through the convalescent phase of infection. The enhancing antibody titers were not different among the four serotypes or from the infecting isolate. The anti-dengue antibodies from dengue patients can enhance dengue virus infections in a concentration-dependent, serotype-independent manner.
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Affiliation(s)
- Chai Teerasut
- Si Sa Ket Provincial Hospital, Office of Permanent Secretary, Ministry of Public Health, Si Sa Ket, Thailand
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Takeuchi D, Kerdsin A, Pienpringam A, Loetthong P, Samerchea S, Luangsuk P, Khamisara K, Wongwan N, Areeratana P, Chiranairadul P, Lertchayanti S, Petcharat S, Yowang A, Chaiwongsaen P, Nakayama T, Akeda Y, Hamada S, Sawanpanyalert P, Dejsirilert S, Oishi K. Population-based study of Streptococcus suis infection in humans in Phayao Province in northern Thailand. PLoS One 2012; 7:e31265. [PMID: 22363601 PMCID: PMC3283636 DOI: 10.1371/journal.pone.0031265] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.8] [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: 10/17/2011] [Accepted: 01/04/2012] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Streptococcus suis infection in humans has received increasing worldwide recognition. METHODS AND FINDINGS A prospective study of S. suis infection in humans was conducted in Phayao Province in northern Thailand to determine the incidence and the risk behaviors of the disease in this region in 2010. Thirty-one cases were confirmed. The case fatality rate was 16.1%, and the estimated incidence rate was 6.2 per 100,000 in the general population. The peak incidence occurred in May. The median age of the patients was 53 years and 64.5% were men. Consumption of raw pork products was confirmed in 22 cases and the median incubation period (range) was 2 days (0-11) after consumption of raw pork products. Isolates from 31 patients were confirmed as serotype 2 in 23 patients (74.2%) and serotype 14 in eight patients (25.8%). The major sequence types (STs) were ST1 (n = 20) for serotype 2 and ST105 (n = 8) for serotype 14. The epidemiological analysis suggested three possible clusters, which included 17 cases. In the largest possible cluster of 10 cases in Chiang Kham and its neighboring districts in May, the source of infection in four cases was identified as a raw pork dish served at the same restaurant in this district. Microbiological analysis confirmed that three of four cases associated with consumption of raw pork at this restaurant were attributable to an identical strain of serotype 2 with ST1 and pulsotype A2. CONCLUSIONS Our data suggest a high incidence rate of S. suis infection in the general population in Phayao Province in 2010 and confirm a cluster of three cases in 31 human cases. Food safety control should be strengthened especially for raw pork products in northern Thailand.
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Affiliation(s)
- Dan Takeuchi
- Laboratory for Clinical Research on Infectious Diseases, International Research Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Anusak Kerdsin
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | | | | | | | | | | | | | | | | | | | - Sininat Petcharat
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Amara Yowang
- Chiang Rai Regional Medical Sciences Center, Chiang Rai, Thailand
| | | | - Tatsuya Nakayama
- Laboratory for Clinical Research on Infectious Diseases, International Research Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Yukihiro Akeda
- Laboratory for Clinical Research on Infectious Diseases, International Research Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Shigeyuki Hamada
- Thailand-Japan Research Collaboration Center for Emerging and Re-emerging Infections, Nonthaburi, Thailand
| | - Pathom Sawanpanyalert
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Surang Dejsirilert
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Kazunori Oishi
- Laboratory for Clinical Research on Infectious Diseases, International Research Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
- * E-mail:
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Chittaganpitch M, Supawat K, Olsen SJ, Waicharoen S, Patthamadilok S, Yingyong T, Brammer L, Epperson SP, Akrasewi P, Sawanpanyalert P. Influenza viruses in Thailand: 7 years of sentinel surveillance data, 2004-2010. Influenza Other Respir Viruses 2011; 6:276-83. [PMID: 22074057 PMCID: PMC5779807 DOI: 10.1111/j.1750-2659.2011.00302.x] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [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] [Indexed: 11/28/2022] Open
Abstract
Please cite this paper as: Chittaganpitch et al. (2012) Influenza viruses in Thailand: 7 years of sentinel surveillance data, 2004–2010. Influenza and Other Respiratory Viruses 6(4), 276–283. Background The re‐emergence of avian influenza A (H5N1) in 2004 and the pandemic of influenza A (H1N1) in 2009 highlight the need for routine surveillance systems to monitor influenza viruses, particularly in Southeast Asia where H5N1 is endemic in poultry. In 2004, the Thai National Institute of Health, in collaboration with the US Centers for Disease Control and Prevention, established influenza sentinel surveillance throughout Thailand. Objectives To review routine epidemiologic and virologic surveillance for influenza viruses for public health action. Methods Throat swabs from persons with influenza‐like illness and severe acute respiratory illness were collected at 11 sentinel sites during 2004–2010. Influenza viruses were identified using the standard protocol for polymerase chain reaction. Viruses were cultured and identified by immunofluorescence assay; strains were identified by hemagglutination inhibition assay. Data were analyzed to describe frequency, seasonality, and distribution of circulating strains. Results Of the 19 457 throat swabs, 3967 (20%) were positive for influenza viruses: 2663 (67%) were influenza A and able to be subtyped [21% H1N1, 25% H3N2, 21% pandemic (pdm) H1N1] and 1304 (33%) were influenza B. During 2009–2010, the surveillance system detected three waves of pdm H1N1. Influenza annually presents two peaks, a major peak during the rainy season (June–August) and a minor peak in winter (October–February). Conclusions These data suggest that March–April may be the most appropriate months for seasonal influenza vaccination in Thailand. This system provides a robust profile of the epidemiology of influenza viruses in Thailand and has proven useful for public health planning.
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Boonchawalit S, Jullaksorn D, Uttiyoung J, Yowang A, Krathong N, Chautrakul S, Yamashita A, Ikuta K, Roobsoong A, Kanitvittaya S, Sawanpanyalert P, Kameoka M. Molecular evolution of HIV-1 CRF01_AE Env in Thai patients. PLoS One 2011; 6:e27098. [PMID: 22073263 PMCID: PMC3206936 DOI: 10.1371/journal.pone.0027098] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [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: 08/26/2011] [Accepted: 10/10/2011] [Indexed: 12/03/2022] Open
Abstract
Background The envelope glycoproteins (Env), gp120 and gp41, are the most variable proteins of human immunodeficiency virus type 1 (HIV-1), and are the major targets of humoral immune responses against HIV-1. A circulating recombinant form of HIV-1, CRF01_AE, is prevalent throughout Southeast Asia; however, only limited information regarding the immunological characteristics of CRF01_AE Env is currently available. In this study, we attempted to examine the evolutionary pattern of CRF01_AE Env under the selection pressure of host immune responses. Methodology/Principal Findings Peripheral blood samples were collected periodically over 3 years from 15 HIV-1-infected individuals residing in northern Thailand, and amplified env genes from the samples were subjected to computational analysis. The V5 region of gp120 showed highest variability in several samples over 3 years, whereas the V1/V2 and/or V4 regions of gp120 also showed high variability in many samples. In addition, the N-terminal part of the C3 region of gp120 showed highest amino acid diversity among the conserved regions of gp120. Chronological changes in the numbers of amino acid residues in gp120 variable regions and potential N-linked glycosylation (PNLG) sites are involved in increasing the variability of Env gp120. Furthermore, the C3 region contained several amino acid residues potentially under positive selection, and APOBEC3 family protein-mediated G to A mutations were frequently detected in such residues. Conclusions/Significance Several factors, including amino acid substitutions particularly in gp120 C3 and V5 regions as well as changes in the number of PNLG sites and in the length of gp120 variable regions, were revealed to be involved in the molecular evolution of CRF01_AE Env. In addition, a similar tendency was observed between CRF01_AE and subtype C Env with regard to the amino acid variation of gp120 V3 and C3 regions. These results may provide important information for understanding the immunological characteristics of CRF01_AE Env.
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Affiliation(s)
- Samatchaya Boonchawalit
- Thailand-Japan Research Collaboration Center on Emerging and Re-emerging Infections (RCC-ERI), Nonthaburi, Thailand
| | - Duangrat Jullaksorn
- National Institute of Health, Department of Medical Sciences (DMSc), Ministry of Public Health (MOPH), Nonthaburi, Thailand
| | - Jiraporn Uttiyoung
- Regional Medical Science Center Chiangrai, DMSc, MOPH, Chiangrai, Thailand
| | - Amara Yowang
- Regional Medical Science Center Chiangrai, DMSc, MOPH, Chiangrai, Thailand
| | | | | | | | - Kazuyoshi Ikuta
- Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | | | | | - Pathom Sawanpanyalert
- National Institute of Health, Department of Medical Sciences (DMSc), Ministry of Public Health (MOPH), Nonthaburi, Thailand
| | - Masanori Kameoka
- Thailand-Japan Research Collaboration Center on Emerging and Re-emerging Infections (RCC-ERI), Nonthaburi, Thailand
- Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
- * E-mail:
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Kerdsin A, Dejsirilert S, Puangpatra P, Sripakdee S, Chumla K, Boonkerd N, Polwichai P, Tanimura S, Takeuchi D, Nakayama T, Nakamura S, Akeda Y, Gottschalk M, Sawanpanyalert P, Oishi K. Genotypic profile of Streptococcus suis serotype 2 and clinical features of infection in humans, Thailand. Emerg Infect Dis 2011; 17:835-42. [PMID: 21529392 PMCID: PMC3321758 DOI: 10.3201/eid1705.100754] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [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] [Indexed: 11/19/2022] Open
Abstract
To examine associations between clinical features of Streptococcus suis serotype 2 infections in humans in Thailand and genotypic profiles of isolates, we conducted a retrospective study during 2006–2008. Of 165 patients for whom bacterial cultures of blood, cerebrospinal fluid, or both were positive for S. suis serotype 2, the major multilocus sequence types (STs) found were ST1 (62.4%) and ST104 (25.5%); the latter is unique to Thailand. Clinical features were examined for 158 patients. Infections were sporadic; case-fatality rate for adults was 9.5%, primarily in northern Thailand. Disease incidence peaked during the rainy season. Disease was classified as meningitis (58.9%) or nonmeningitis (41.1%, and included sepsis [35.4%] and others [5.7%]). Although ST1 strains were significantly associated with the meningitis category (p<0.0001), ST104 strains were significantly associated with the nonmeningitis category (p<0.0001). The ST1 and ST104 strains are capable of causing sepsis, but only the ST1 strains commonly cause meningitis.
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Kerdsin A, Dejsirilert S, Sawanpanyalert P, Boonnark A, Noithachang W, Sriyakum D, Simkum S, Chokngam S, Gottschalk M, Akeda Y, Oishi K. Sepsis and spontaneous bacterial peritonitis in Thailand. Lancet 2011; 378:960. [PMID: 21890062 DOI: 10.1016/s0140-6736(11)60923-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- Anusak Kerdsin
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
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Tawatsin A, Thavara U, Chompoosri J, Phusup Y, Jonjang N, Khumsawads C, Bhakdeenuan P, Sawanpanyalert P, Asavadachanukorn P, Mulla MS, Siriyasatien P, Debboun M. Insecticide resistance in bedbugs in Thailand and laboratory evaluation of insecticides for the control of Cimex hemipterus and Cimex lectularius (Hemiptera: Cimicidae). J Med Entomol 2011; 48:1023-1030. [PMID: 21936321 DOI: 10.1603/me11003] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Bedbugs are found in many countries around the world, and in some regions they are resistant to numerous insecticides. This study surveyed bedbugs in Thailand and determined their resistance to insecticides. The surveys were carried out in six provinces that attract large numbers of foreign tourists: Bangkok, Chonburi, Chiang Mai, Ubon Ratchathani, Phuket, and Krabi. Bedbugs were collected from hotels and colonized in the laboratory to evaluate their resistance to insecticides. Cimex hemipterus (F.) was found in some hotels in Bangkok, Chonburi, Phuket, and Krabi, whereas Cimex lectularius L. was found only in hotels in Chiang Mai. No bedbugs were found in Ubon Ratchathani. The colonized bedbugs showed resistance to groups of insecticides, including organochlorines (dichlorodiphenyl trichloroethane, dieldrin), carbamates (bendiocarb, propoxur), organophosphates (malathion, fenitrothion), and pyrethroids (cyfluthrin, deltamethrin, permethrin, lambda-cyhalothrin, etofenprox) in tests using World Health Organization insecticide-impregnated papers. The new insecticides imidacloprid (neonicotinoid group), chlorfenapyr (pyrrole group), and fipronil (phenylpyrazole group) were effective against the bedbugs; however, organophosphate (diazinon), carbamates (fenobucarb, propoxur), and pyrethroids (bifenthrin, cypermethrin, esfenvalerate, etofenprox) were ineffective. Aerosols containing various pyrethroid insecticides with two to four different active ingredients were effective against the bedbugs. The results obtained from this study suggested that both species of bedbugs in Thailand have developed marked resistance to various groups of insecticides, especially those in the pyrethroid group, which are the most common insecticides used for pest control. Therefore, an integrated pest management should be implemented for managing bedbugs in Thailand.
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Affiliation(s)
- Apiwat Tawatsin
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi 11000, Thailand
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Mori M, Sriwanthana B, Wichukchinda N, Boonthimat C, Tsuchiya N, Miura T, Pathipvanich P, Ariyoshi K, Sawanpanyalert P. Unique CRF01_AE Gag CTL epitopes associated with lower HIV-viral load and delayed disease progression in a cohort of HIV-infected Thais. PLoS One 2011; 6:e22680. [PMID: 21826201 PMCID: PMC3149616 DOI: 10.1371/journal.pone.0022680] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [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: 04/26/2011] [Accepted: 06/28/2011] [Indexed: 11/19/2022] Open
Abstract
Cytotoxic T Lymphocytes (CTLs) play a central role in controlling HIV-replication. Although numerous CTL epitopes have been described, most are in subtype B or C infection. Little is known about CTL responses in CRF01_AE infection. Gag CTL responses were investigated in a cohort of 137 treatment-naïve HIV-1 infected Thai patients with high CD4+ T cell counts, using gIFN Enzyme-Linked Immunospot (ELISpot) assays with 15-mer overlapping peptides (OLPs) derived from locally dominant CRF01_AE Gag sequences. 44 OLPs were recognized in 112 (81.8%) individuals. Both the breadth and magnitude of the CTL response, particularly against the p24 region, positively correlated with CD4+ T cell count and inversely correlated with HIV viral load. The breadth of OLP response was also associated with slower progression to antiretroviral therapy initiation. Statistical analysis and single peptide ELISpot assay identified at least 17 significant associations between reactive OLP and HLA in 12 OLP regions; 6 OLP-HLA associations (35.3%) were not compatible with previously reported CTL epitopes, suggesting that these contained new CTL Gag epitopes. A substantial proportion of CTL epitopes in CRF01_AE infection differ from subtype B or C. However, the pattern of protective CTL responses is similar; Gag CTL responses, particularly against p24, control viral replication and slow clinical progression.
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Affiliation(s)
- Masahiko Mori
- Department of Clinical Medicine, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Japan Foundation for AIDS Prevention (JFAP), Tokyo, Japan
| | - Busarawan Sriwanthana
- Thai National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Nuanjun Wichukchinda
- Thai National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Chetsada Boonthimat
- Thai National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Naho Tsuchiya
- Department of Clinical Medicine, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Global COE Program, Nagasaki University, Nagasaki, Japan
| | - Toshiyuki Miura
- Advanced Clinical Research Center, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | | | - Koya Ariyoshi
- Department of Clinical Medicine, Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Global COE Program, Nagasaki University, Nagasaki, Japan
- * E-mail:
| | - Pathom Sawanpanyalert
- Thai National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
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Chansang U, Mulla MS, Sawanpanyalert P. Temporal and spatial distribution, sex ratio and fecundity of the eye fly siphunculina funicola (Diptera: Chloropidae) at aggregation sites during diurnal and nocturnal periods. Southeast Asian J Trop Med Public Health 2011; 42:274-288. [PMID: 21710847] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The present study was aimed to determine the distribution and abundance of the eye fly Siphunculina funicola (de Meijere) in Thailand and to investigate the sex ratio and fecundity of eye flies from aggregation sites collected during the day-time and night-time. The flies were collected from several provinces in central Thailand and Phuket in the south. Observations were regarding the relative abundance of eye flies in different regions and seasons. During 2007 and 2008, large populations of eye flies were noted at resting sites in central Thailand with both day and night collections. Males flies outnumbered female flies. Smaller populations were seen in Chumphon and Surat Thani Provinces with increasing numbers in Krabi and Phuket Provinces in the south. The gravid rate was nil in the few females collected in Chomphon and Surat Thani but were 3.9% and 36.3% in Krabi and Phuket, respectively. The gravid rates were higher during the dry season or during dry spells than during wet and rainy periods, suggesting egg retention by the females when oviposition sites (presumably soil) were dry. Numerous day and night collections were made in Chon Buri Province. In most collections males predominated but there was no differences in the numbers of flies collected during the two time periods. There was a slightly greater percentage of females (still lower than males) during the night collections. During the dry and hot season, due to lack of optimum oviposition sites because of dryness, the eggs were retained in the females. A series of day time collections at the end of April 2008 and in February-March 2009 had higher numbers of gravid females. Day time collections in May 2008 (start of the rainy season) showed a moderate number of gravid females, but the gravid rates were low during the rainy season, indicating higher oviposition activity by females.
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Affiliation(s)
- Uruyakorn Chansang
- Taxonomy and Museum Reference Section, National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand.
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Isarangkura-na-ayuthaya P, Kaewnoo W, Auwanit W, de Silva UC, Ikuta K, Sawanpanyalert P, Kameoka M. Appearance of Drug Resistance-Associated Mutations in Human Immunodeficiency Virus Type 1 CRF01_AE Integrase Derived from Drug-Naive Thai Patients. AIDS Res Hum Retroviruses 2010; 26:1341-3. [PMID: 20836708 DOI: 10.1089/aid.2010.0140] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
CRF01_AE is a major subtype of human immunodeficiency virus type 1 (HIV-1) circulating in Southeast Asia, including Thailand. We performed genotypic studies on HIV-1 CRF01_AE integrase derived from plasma samples from drug-naive Thai patients. Direct sequencing of amplified CRF01_AE integrase genes revealed that although no primary mutations associated with drug resistance to integrase inhibitors were detected, at least one secondary mutation was found in 96% of samples. Our results indicate that the impact of these mutations on the baseline drug susceptibility of CRF01_AE viruses to integrase inhibitors may need to be addressed prior to the introduction of these drugs in Southeast Asian countries, including Thailand.
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Affiliation(s)
| | - Wiyada Kaewnoo
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Wattana Auwanit
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - U. Chandimal de Silva
- Thailand-Japan Research Collaboration Center on Emerging and Re-emerging Infections (RCC-ERI), Nonthaburi, Thailand
- Department of Genome Informatics, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Kazuyoshi Ikuta
- Thailand-Japan Research Collaboration Center on Emerging and Re-emerging Infections (RCC-ERI), Nonthaburi, Thailand
- Department of Virology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
| | - Pathom Sawanpanyalert
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Nonthaburi, Thailand
| | - Masanori Kameoka
- Thailand-Japan Research Collaboration Center on Emerging and Re-emerging Infections (RCC-ERI), Nonthaburi, Thailand
- Department of Virology, Research Institute for Microbial Diseases, Osaka University, Osaka, Japan
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Mekha N, Sugita T, Makimura K, Poonwan N, Sawanpanyalert P, Ikeda R, Nishikawa A. The intergenic spacer region of the ribosomal RNA gene of Penicillium marneffei shows almost no DNA sequence diversity. Microbiol Immunol 2010; 54:714-6. [DOI: 10.1111/j.1348-0421.2010.00270.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kameoka M, Isarangkura-na-ayuthaya P, Kameoka Y, Sapsutthipas S, Soonthornsata B, Nakamura S, Tokunaga K, Sawanpanyalert P, Ikuta K, Auwanit W. The role of lysine residue at amino acid position 165 of human immunodeficiency virus type 1 CRF01_AE Gag in reducing viral drug susceptibility to protease inhibitors. Virology 2010; 405:129-38. [DOI: 10.1016/j.virol.2010.06.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2010] [Revised: 04/12/2010] [Accepted: 06/01/2010] [Indexed: 11/25/2022]
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Kanai Y, Chittaganpitch M, Nakamura I, Li GM, Bai GR, Li YG, Ikuta K, Sawanpanyalert P. Distinct propagation efficiencies of H5N1 influenza virus Thai isolates in newly established murine respiratory region-derived cell clones. Virus Res 2010; 153:218-25. [PMID: 20709117 DOI: 10.1016/j.virusres.2010.08.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2010] [Revised: 07/31/2010] [Accepted: 08/06/2010] [Indexed: 11/24/2022]
Abstract
Inbred mice have been widely used for the study of influenza viruses as a mammalian model, while suitable cell lines derived from murine tissue have been limited. Here, we established several immortalized cell clones from respiratory regions of inbred mice (C57BL/6 and BALB/c) by transformation using simian virus 40 large T antigen expression vector. Twenty-five cell clones from C57/BL and BALB/c, designated as MRDC/C and MRDC/B series, respectively, showed different susceptibility to Thai isolates of influenza A virus H5N1. Two murine cell clones, C6 and B7 which were extensively studied expressed both SAα2,3 and SAα2,6 sialic acid receptors. Interestingly, the 6 Thai patient-derived H5N1 isolates examined showed varied virus propagation efficiency in murine cell clones, although there were only slight differences in their propagation in MDCK and A549 cell lines. The results indicate that the murine cell clones are useful for examining the propagation efficiency of H5N1 viruses in vitro.
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Affiliation(s)
- Yuta Kanai
- Section of Viral Infections, Thailand-Japan Research Collaboration Center on Emerging and Re-emerging Infections (RCC-ERI), Nonthaburi, Thailand. ,
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Champunot R, Tanjatham S, Kerdsin A, Puangpatra P, Wangsai S, Treebuphachatsakul P, Tasnsuphaswasdikul S, Kiatvitchukul C, Kasyanan H, Yimsabai J, Akeda Y, Kawakami K, Sawanpanyalert P, Dejsirilert S, Oishi K. Impact of Pandemic Influenza (H1N1) Virus-Associated Community-Acquired Pneumonia among Adults in a Tertiary Hospital in Thailand. Jpn J Infect Dis 2010. [DOI: 10.7883/yoken.63.251] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
| | | | - Anusak Kerdsin
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Thailand
| | - Parichart Puangpatra
- Thailand-Japan Research Collaboration Center for Emerging and Re-Emerging Infections, Department of Medical Sciences, Ministry of Public Health, Thailand
| | - Sunee Wangsai
- Department of Medicine, Buddhachinaraj Hospital, Thailand
| | | | | | | | | | | | - Yukihiro Akeda
- Laboratory for Clinical Research on Infectious Diseases, International Research Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Japan
| | - Kazuyoshi Kawakami
- Department of Medical Microbiology, Mycology and Immunology, Tohoku University Graduate School of Medicine, Japan
| | - Pathom Sawanpanyalert
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Thailand
| | - Surang Dejsirilert
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Thailand
| | - Kazunori Oishi
- Laboratory for Clinical Research on Infectious Diseases, International Research Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Japan
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Saeng-aroon S, Tsuchiya N, Auwanit W, Ayuthaya PIN, Pathipvanich P, Sawanpanyalert P, Rojanawiwat A, Kannagi M, Ariyoshi K, Sugiura W. Drug-resistant mutation patterns in CRF01_AE cases that failed d4T+3TC+nevirapine fixed-dosed, combination treatment: Follow-up study from the Lampang cohort. Antiviral Res 2010; 87:22-9. [DOI: 10.1016/j.antiviral.2010.04.001] [Citation(s) in RCA: 10] [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] [Received: 11/11/2009] [Revised: 03/25/2010] [Accepted: 04/01/2010] [Indexed: 10/19/2022]
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Champunot R, Tanjatham S, Kerdsin A, Puangpatra P, Wangsai S, Treebuphachatsakul P, Tasnsuphaswasdikul S, Kiatvitchukul C, Kasyanan H, Yimsabai J, Akeda Y, Kawakami K, Sawanpanyalert P, Dejsirilert S, Oishi K. Impact of pandemic influenza (H1N1) virus-associated community-acquired pneumonia among adults in a tertiary hospital in Thailand. Jpn J Infect Dis 2010; 63:251-256. [PMID: 20657064] [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: 05/29/2023]
Abstract
In July 2009, a pandemic influenza (H1N1) (pdm H1N1) virus epidemic emerged rapidly in Phitsanulok, Thailand. Adult cases of community-acquired pneumonia (CAP) were prospectively examined for pdm H1N1 virus infections by real-time PCR in a tertiary hospital in Phitsanulok from July to November 2009. Twenty-four cases of pdm H1N1 virus-associated CAP were confirmed, and their clinical features including bacterial infection, severity of disease, course of admission, treatment, and outcome were investigated. The median age of these cases was 39.5 years. Most cases appeared to be primary viral pneumonia, but only one case was positive for a urinary pneumococcal antigen. The median time from the onset of illness to admission was 4 days. All 24 patients received oseltamivir after admission. Twelve (50.0%) were defined as having severe CAP and 9 (37.5%) were diagnosed with acute respiratory distress syndrome (ARDS). During the study period, pdm H1N1 virus infections frequently caused severe CAP among young adults because of the delayed initiation of antiviral therapy. Of the 9 ARDS patients, 3 died of ventilator-associated pneumonia caused by multidrug-resistant Acinetobacter baumannii. Implementation of infection control targeting this pathogen is required in tertiary hospitals in Thailand.
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Affiliation(s)
- Ratapum Champunot
- Department of Medicine, Buddhachinaraj Hospital, Phitsanulok, Thailand
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Gesprasert G, Wichukchinda N, Mori M, Shiino T, Auwanit W, Sriwanthana B, Pathipvanich P, Sawanpanyalert P, Miura T, Auewarakul P, Thitithanyanont A, Ariyoshi K. HLA-associated immune pressure on Gag protein in CRF01_AE-infected individuals and its association with plasma viral load. PLoS One 2010; 5:e11179. [PMID: 20567513 PMCID: PMC2887364 DOI: 10.1371/journal.pone.0011179] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [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: 01/05/2010] [Accepted: 05/15/2010] [Indexed: 11/19/2022] Open
Abstract
Background The human leukocyte antigen (HLA)-restricted cytotoxic T-lymphocyte (CTL) immune response is one of the major factors determining the genetic diversity of human immunodeficiency virus (HIV). There are few population-based analyses of the amino acid variations associated with the host HLA type and their clinical relevance for the Asian population. Here, we identified HLA-associated polymorphisms in the HIV-1 CRF01_AE Gag protein in infected married couples, and examined the consequences of these HLA-selected mutations after transmission to HLA-unmatched recipients. Methodology/Principal Findings One hundred sixteen HIV-1-infected couples were recruited at a government hospital in northern Thailand. The 1.7-kb gag gene was amplified and directly sequenced. We identified 56 associations between amino acid variations in Gag and HLA alleles. Of those amino acid variations, 35 (62.5%) were located within or adjacent to regions reported to be HIV-specific CTL epitopes restricted by the relevant HLA. Interestingly, a significant number of HLA-associated amino acid variations appear to be unique to the CRF01_AE-infected Thai population. Variations in the capsid protein (p24) had the strongest associations with the viral load and CD4 cell count. The mutation and reversion rates after transmission to a host with a different HLA environment varied considerably. The p24 T242N variant escape from B57/58 CTL had a significant impact on the HIV-1 viral load of CRF01_AE-infected patients. Conclusions/Significance HLA-associated amino acid mutations and the CTL selection pressures on the p24 antigen appear to have the most significant impact on HIV replication in a CRF01_AE-infected Asian population. HLA-associated mutations with a low reversion rate accumulated as a footprint in this Thai population. The novel HLA-associated mutations identified in this study encourage us to acquire more extensive information about the viral dynamics of HLA-associated amino acid polymorphisms in a given population as effective CTL vaccine targets.
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Affiliation(s)
- Goragoch Gesprasert
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
| | - Nuanjun Wichukchinda
- Department of Medical Sciences, National Institute of Health, Ministry of Public Health, Nonthaburi, Thailand
| | - Masahiko Mori
- Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
| | - Teiichiro Shiino
- AIDS Research Center, National Institute of Infectious Diseases, Tokyo, Japan
| | - Wattana Auwanit
- Department of Medical Sciences, National Institute of Health, Ministry of Public Health, Nonthaburi, Thailand
| | - Busarawan Sriwanthana
- Department of Medical Sciences, National Institute of Health, Ministry of Public Health, Nonthaburi, Thailand
| | | | - Pathom Sawanpanyalert
- Department of Medical Sciences, National Institute of Health, Ministry of Public Health, Nonthaburi, Thailand
| | - Toshiyuki Miura
- Advanced Clinical Research Center, Institute of Medical Science, University of Tokyo, Tokyo, Japan
| | - Prasert Auewarakul
- Department of Microbiology, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Arunee Thitithanyanont
- Department of Microbiology, Faculty of Science, Mahidol University, Bangkok, Thailand
- * E-mail:
| | - Koya Ariyoshi
- Institute of Tropical Medicine (NEKKEN), Nagasaki University, Nagasaki, Japan
- Global COE Program, Nagasaki University, Nagasaki, Japan
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Kanai Y, Boonsathorn N, Chittaganpitch M, Bai G, Li Y, Kase T, Takahashi K, Okuno Y, Jampangern W, Ikuta K, Sawanpanyalert P. The impact of antigenic drift of influenza A virus on human herd immunity: Sero-epidemiological study of H1N1 in healthy Thai population in 2009. Vaccine 2010; 28:5437-44. [PMID: 20558249 DOI: 10.1016/j.vaccine.2010.06.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Revised: 05/18/2010] [Accepted: 06/01/2010] [Indexed: 02/03/2023]
Abstract
To examine the effect of the antigenic drift of H1N1 influenza viruses on herd immunity, neutralization antibodies from 744 sera from Thai healthy volunteers in 2008-2009, who had not been vaccinated for at least the last 5 years, were investigated by microneutralization (MN) and hemagglutination inhibition (HI) assays. Significantly higher MN titers were observed for the H1N1 Thai isolate in 2006 than in 2008. The results indicate that the antigenically drifted virus effectively escaped herd immunity. Since the low neutralization activity of herd immunity against drifted viruses is an important factor for viruses to spread efficiently, continuous sero-epidemiological study is required for public health.
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Affiliation(s)
- Yuta Kanai
- Section of Viral Infections, Thailand-Japan Research Collaboration Center on Emerging and Re-emerging Infections (RCC-ERI), Nonthaburi, Thailand.
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Li YG, Chittaganpitch M, Waicharoen S, Kanai Y, Bai GR, Kameoka M, Takeda N, Ikuta K, Sawanpanyalert P. Characterization of H5N1 influenza viruses isolated from humans in vitro. Virol J 2010; 7:112. [PMID: 20515447 PMCID: PMC2890526 DOI: 10.1186/1743-422x-7-112] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [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: 01/13/2010] [Accepted: 06/01/2010] [Indexed: 12/23/2022] Open
Abstract
Since December 1997, highly pathogenic avian influenza A H5N1viruses have swept through poultry populations across Asian countries and been transmitted into African and European countries. We characterized 6 avian influenza H5N1 viruses isolated from humans in 2004 in Thailand. A highly pathogenic (HP) KAN353 strain showed faster replication and higher virulence in embryonated eggs compared to other strains, especially compared to the low pathogenic (LP) SP83 strain. HP KAN353 also showed strong cytopathogenicity compared to SP83 in Madin-Darby canine kidney cells. Interestingly, LP SP83 induced smaller plaques compared to other strains, especially HP KAN353. PB2 amino acid 627E may contribute to low virulence, whereas either PB2 amino acid 627 K or the combination of 627E/701N seems to be associated with high virulence. The in vitro assays used in this study may provide the basis for assessing the pathogenesis of influenza H5N1 viruses in vivo.
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Affiliation(s)
- Yong-Gang Li
- Thailand-Japan Research Collaboration Center on Emerging and Re-emerging Infections, Muang, Nonthaburi, Thailand.
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Kerdsin A, Uchida R, Verathamjamrus C, Puangpatra P, Kawakami K, Puntanakul P, Lochindarat S, Bunnag T, Sawanpanyalert P, Dejsirilert S, Oishi K. Development of Triplex SYBR Green Real-Time PCR for Detecting <i>Mycoplasma pneumoniae</i>, <i>Chlamydophila pneumoniae</i>, and <i>Legionella</i> spp. without Extraction of DNA. Jpn J Infect Dis 2010. [DOI: 10.7883/yoken.63.173] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Anusak Kerdsin
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Thailand
| | - Ryuichi Uchida
- Thailand-Japan Research Collaboration Center for Emerging and Re-emerging Infections, Research Institute for Microbial Diseases, Japan
| | - Chris Verathamjamrus
- Thailand-Japan Research Collaboration Center for Emerging and Re-emerging Infections, National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Thailand
| | - Parichart Puangpatra
- Thailand-Japan Research Collaboration Center for Emerging and Re-emerging Infections, National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Thailand
| | - Kazuyoshi Kawakami
- Department of Medical Microbiology, Mycology and Immunology, Tohoku University Graduate School of Medicine, Japan
| | - Pollert Puntanakul
- Bangkok Metropolitan Administration Medical College and Vajira Hospital, Thailand
| | | | | | - Pathom Sawanpanyalert
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Thailand
| | - Surang Dejsirilert
- National Institute of Health, Department of Medical Sciences, Ministry of Public Health, Thailand
| | - Kazunori Oishi
- International Research Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Japan
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