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Sun CQ, Fu YQ, Ma X, Shen JR, Hu B, Zhang Q, Wang LK, Hu R, Chen JJ. Trends in temporal and spatial changes of Japanese encephalitis in Chinese mainland, 2004-2019: A population-based surveillance study. Travel Med Infect Dis 2024; 60:102724. [PMID: 38692338 DOI: 10.1016/j.tmaid.2024.102724] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2023] [Revised: 03/23/2024] [Accepted: 04/28/2024] [Indexed: 05/03/2024]
Abstract
BACKGROUND Japanese encephalitis (JE) is a serious health concern in China, with approximately 80 % of global infections occurring in China. To develop effective prevention and control strategies, this study explored the epidemiological characteristics of JE in China based on spatiotemporal data, to understand the patterns and trends of JE incidence in different regions and time periods. METHOD The incidence and mortality rates of JE were extracted from the Public Health Data Center, the official website of the National Health Commission of the People's Republic of China, and the National Notifiable Infectious Disease Surveillance System from 2004 to 2019. Joinpoint regression was applied to examine the spatiotemporal patterns and annual percentage change in incidence and mortality of the JE. RESULTS From 2004 to 2019, a total of 43,569 cases of JE were diagnosed, including 2081 deaths. The annual incidence rate of JE decreased from 0.4171/100,000 in 2004 to 0.0298/100,000 in 2019, with an annual percentage change (APC) of -13.5 % (P < 0.001). The annual mortality rate of JE showed three stages of change, with inflection points in 2006 and 2014. The incidence and mortality rates of JE have declined in all provinces of China, and more cases were reported in 0-14 years of age, accounting for nearly 80 % of all patients. CONCLUSIONS The morbidity and mortality rates of JE in China are generally on a downward trend, and emphasis should be placed on strengthening disease surveillance in special areas and populations, popularizing vaccination, and increasing publicity.
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Affiliation(s)
- Chang-Qing Sun
- Department of College of Public Health, Zhengzhou University, High-Tech Development Zone of States, Zhengzhou, 450001, PR China; School of Nursing and Health, Zhengzhou University, High-Tech Development Zone of States, Zhengzhou, 450001, PR China.
| | - Yun-Qiang Fu
- Department of College of Public Health, Zhengzhou University, High-Tech Development Zone of States, Zhengzhou, 450001, PR China.
| | - Xuan Ma
- Department of College of Public Health, Zhengzhou University, High-Tech Development Zone of States, Zhengzhou, 450001, PR China
| | - Jun-Ru Shen
- Department of College of Public Health, Zhengzhou University, High-Tech Development Zone of States, Zhengzhou, 450001, PR China
| | - Bo Hu
- School of Nursing and Health, Zhengzhou University, High-Tech Development Zone of States, Zhengzhou, 450001, PR China
| | - Qiang Zhang
- School of Nursing and Health, Zhengzhou University, High-Tech Development Zone of States, Zhengzhou, 450001, PR China
| | - Lian-Ke Wang
- School of Nursing and Health, Zhengzhou University, High-Tech Development Zone of States, Zhengzhou, 450001, PR China
| | - Rui Hu
- Department of College of Public Health, Zhengzhou University, High-Tech Development Zone of States, Zhengzhou, 450001, PR China
| | - Jia-Jun Chen
- Department of College of Public Health, Zhengzhou University, High-Tech Development Zone of States, Zhengzhou, 450001, PR China.
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Yu Y, Liu Y, Ling F, Sun J, Jiang J. Epidemiological Characteristics and Economic Burden of Dengue in Zhejiang Province, China. Viruses 2023; 15:1731. [PMID: 37632073 PMCID: PMC10458908 DOI: 10.3390/v15081731] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/03/2023] [Accepted: 08/11/2023] [Indexed: 08/27/2023] Open
Abstract
Dengue imposes a heavy economic burden on families and society. We used surveillance data reported in 2019 to characterize the dengue epidemic in Zhejiang Province, China, which provided guidance for dengue prevention and control. Dengue epidemics mostly occurred in July to October. People aged 30-44 years, males, and commercial service workers were more likely to suffer from dengue. The epidemic areas were mainly in Hangzhou and Wenzhou. Meanwhile, we assessed the economic cost of dengue in the province from both family and organizational perspectives. The direct economic burden of dengue patients was estimated to be USD 405,038.25, and the indirect economic burden was USD 140,364.90, for a total economic burden of USD 543,213.00. The direct economic burden of dengue patients should be reduced by increasing the coverage and reimbursement of health insurance. Additionally, the total annual cost of dengue prevention and control for the government and organizational sectors was estimated to be USD 7075,654.83. Quantifying the dengue burden is critical for developing disease control strategies, allocating public health resources, and setting health policy priorities.
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Affiliation(s)
- Yi Yu
- Department of Epidemiology and Biostatistics, School of Public Health, Hangzhou Normal University, Hangzhou 311121, China;
| | - Ying Liu
- Key Lab of Vaccine, Prevention and Control of Infectious Disease of Zhejiang Province, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Feng Ling
- Key Lab of Vaccine, Prevention and Control of Infectious Disease of Zhejiang Province, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Jimin Sun
- Key Lab of Vaccine, Prevention and Control of Infectious Disease of Zhejiang Province, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
| | - Jianmin Jiang
- Key Lab of Vaccine, Prevention and Control of Infectious Disease of Zhejiang Province, Zhejiang Provincial Center for Disease Control and Prevention, Hangzhou 310051, China
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Liu W, Hu W, Dong Z, You X. Travel-related infection in Guangzhou, China,2009-2019. Travel Med Infect Dis 2021; 43:102106. [PMID: 34116241 DOI: 10.1016/j.tmaid.2021.102106] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 06/01/2021] [Accepted: 06/04/2021] [Indexed: 11/16/2022]
Abstract
BACKGROUND We analyzed the epidemiological characteristics of travel-related infectious diseases in reported Guangzhou between 2009 and 2019 to provide a scientific basis for prevention and control strategies. METHOD The infectious diseases report information system of China was mined for case reports, combined with clinical diagnosis records, and analyzed. RESULTS Between 2009 and 2019, 1478 cases of imported infectious diseases were reported in Guangzhou. Dengue fever accounted for 46.14%of cases and malaria accounted for 45.47% of cases. The patients with imported travel-related infection cases were mainly male (75.88%), Chinese (75.57%), and aged 20-45 years (83.01%). Cases increased from May each year, peaked between August and September, and declined rapidly after October. The main source areas of import were Africa and other countries in Asia. CONCLUSIONS Dengue fever and malaria are the main travel-related infection in Guangzhou, and are generally brought in by male Chinese workers. Intervention and health education in this population should be strengthened to prevent and control travel-related infection.
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Affiliation(s)
- Weisi Liu
- Guangzhou Center for Disease Control and Prevention, China.
| | - Wensui Hu
- Guangzhou Center for Disease Control and Prevention, China
| | - Zhiqiang Dong
- Guangzhou Center for Disease Control and Prevention, China
| | - Xiaojin You
- Guangzhou Center for Disease Control and Prevention, China
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Wu T, Wu Z, Li YP. Dengue fever and dengue virus in the People's Republic of China. Rev Med Virol 2021; 32:e2245. [PMID: 34235802 DOI: 10.1002/rmv.2245] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2020] [Revised: 04/12/2021] [Accepted: 04/26/2021] [Indexed: 01/05/2023]
Abstract
Infection with dengue virus (DENV) leads to symptoms variable from dengue fever to severe dengue, which has posed a huge socioeconomic and disease burden to the world population, particularly in tropical and subtropical regions. To date, four serotypes of DENV (DENV-1 to DENV-4) have been identified to sustain the transmission cycle in humans. In the past decades, dengue incidences have become more frequent, and four serotypes and various genotypes have been identified in PR China. Several large-scale dengue outbreaks and frequent local endemics occurred in the southern and coastal provinces, and the imported dengue cases accounted primarily for the initiation of the epidemics. No antiviral drug exists for dengue, and no vaccine has been approved to use in PR China, however strategies including public awareness, national reporting system of infectious diseases and public health emergencies, vector mosquito control, personal protection, and improved environmental sanitation have greatly reduced dengue prevalence. Some new technologies in vector mosquito control are emerging and being applied for dengue control. China's territory spans tropical, subtropical, and temperate climates, hence understanding the dengue status in China will be of beneficial for the global prevention and control of dengue. Here, we review the dengue status in PR China for the past decades and the strategies emerging for dengue control.
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Affiliation(s)
- Tiantian Wu
- Institute of Human Virology, Zhongshan School of Medicine, Key Laboratory of Tropical Disease Control of Ministry of Education, Sun Yet-sen University, Guangzhou, China
| | - Zhongdao Wu
- Department of Parasitology, Zhongshan School of Medicine, Key Laboratory of Tropical Disease Control of Ministry of Education, Sun Yet-sen University, Guangzhou, China
| | - Yi-Ping Li
- Institute of Human Virology, Zhongshan School of Medicine, Key Laboratory of Tropical Disease Control of Ministry of Education, Sun Yet-sen University, Guangzhou, China
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Zhang H, Mehmood K, Chang YF, Zhao Y, Lin W, Chang Z. Increase in cases of dengue in China, 2004-2016: A retrospective observational study. Travel Med Infect Dis 2020; 37:101674. [PMID: 32320744 DOI: 10.1016/j.tmaid.2020.101674] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Revised: 09/13/2019] [Accepted: 04/14/2020] [Indexed: 10/24/2022]
Abstract
BACKGROUND Dengue fever (DF) is a vector-bore infectious disease that can infect humans, and has been recognized as a global public health threat, with significant morbidity and mortality rates. METHOD To describe the epidemiological profile of DF in China during 2004-2016, the morbidity data of DF by age-group, season (different months) and geographic location (different provinces) were obtained from the public health science data center of China for subsequent epidemiological analysis. RESULTS The results showed that the incidence of DF shows striking annual variations, and two large outbreaks occurred in 2006-2007 and during 2012-2015. The results of the average morbidity rates (cases/100,000 population) for human DF indicated that among all dengue fever cases, Guangdong in southern area of China had the highest rates (3.8160 cases/100,000 population), followed by Yunnan (0.6614 cases/100,000 population), Fujian (0.3463 cases/100,000 population) and Guangxi (0.1474 cases/100,000 population). Epidemic peaks occurred in late June and early November, and the incidence rate among middle-aged people (30-45 years old) was relatively high, followed by rates among 15-29 and 45-59 age groups. CONCLUSION In this study, we demonstrated the epidemiological profile of DF circulating in China and revealed the geographic distribution, dynamic transmission, seasonal asymmetries and age distribution, which will provide guidelines on the prevention and control of DF in China. The present investigation is useful in the risk assessment of DF transmission, to predict DF outbreaks and the prevention and control strategies should be used along with surveillance to reduce the spread of DF in China.
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Affiliation(s)
- Hui Zhang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China; Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA.
| | - Khalid Mehmood
- University College of Veterinary & Animal Sciences, Islamia University of Bahawalpur, 63100, Pakistan
| | - Yung-Fu Chang
- Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA.
| | - Yabo Zhao
- Department of Microbiology and Immunology, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Wencheng Lin
- College of Veterinary Medicine, South China Agricultural University, Guangzhou, 510642, China; Department of Population Medicine and Diagnostic Sciences, College of Veterinary Medicine, Cornell University, Ithaca, NY, USA
| | - Zhenyu Chang
- Tibet Agriculture and Animal Husbandry College, Linzhi, 860000, Tibet, China
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The surveillance of four mosquito-borne diseases in international travelers arriving at Guangzhou Baiyun International Airport, China, 2016–2017. Travel Med Infect Dis 2019; 32:101513. [PMID: 31712181 DOI: 10.1016/j.tmaid.2019.101513] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Revised: 11/01/2019] [Accepted: 11/06/2019] [Indexed: 01/23/2023]
Abstract
BACKGROUND Little comprehensive analysis combining epidemiological and clinical data has been done with mosquito-borne diseases imported into Guangzhou by air travelers. METHODS We screened international travelers (body temperature >36.5 °C) arriving at Guangzhou Baiyun International Airport, and recorded their epidemiological and clinical information. Whole-blood samples were collected for laboratory diagnosis of dengue virus (DENV), chikungunya virus (CHIKV), zika virus (ZIKV) infections and malaria. RESULTS Between March 1, 2016 and December 31, 2017, 155 (6.6%) cases (100 of DENV, 21 of CHIKV, 1 of ZIKV, 34 of malaria, including one co-infection of DENV and CHIKV) were identified among 2350 febrile travelers. DENV (90.0%) and CHIKV (100.0%) cases mainly came from Southern and Southeast Asia. Malaria cases (91.2%) mainly came from sub-Saharan Africa. Traveling abroad (28/74, 37.8%) and living/working abroad (11/22, 50.0%) were the most common causes of DENV infection and malaria for Chinese, respectively. Cases with these four mosquito-borne diseases were more likely to have nervous, musculoskeletal and skin symptoms and signs than other febrile diseases (P < 0.001). CONCLUSIONS It is important to strengthen the surveillance of mosquito-borne diseases among tourists and workers returning from Southeast Asia, Southern Asia and sub-Saharan Africa, especially those with nervous, musculoskeletal and skin symptoms and signs.
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Zhang H, Wang Y, Li K, Mehmood K, Gui R, Li J. Epidemiology of Japanese Encephalitis in China (2004-2015). Travel Med Infect Dis 2018; 28:109-110. [PMID: 30267769 DOI: 10.1016/j.tmaid.2018.09.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Revised: 09/16/2018] [Accepted: 09/24/2018] [Indexed: 02/08/2023]
Affiliation(s)
- Hui Zhang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Yaping Wang
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Kun Li
- College of Veterinary Medicine, Huazhong Agricultural University, Wuhan, 430070, PR China
| | - Khalid Mehmood
- University College of Veterinary & Animal Sciences, Islamia University of Bahawalpur, 63100, Pakistan
| | - Rui Gui
- The State Key Laboratory of Virology, Wuhan Institute of Virology, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Jiakui Li
- Tibet Agriculture and Animal Husbandry College, Linzhi, 860000, Tibet, China.
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8
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Fang LQ, Sun Y, Zhao GP, Liu LJ, Jiang ZJ, Fan ZW, Wang JX, Ji Y, Ma MJ, Teng J, Zhu Y, Yu P, Li K, Tian YJ, Cao WC. Travel-related infections in mainland China, 2014-16: an active surveillance study. Lancet Public Health 2018; 3:e385-e394. [PMID: 30033200 PMCID: PMC7164813 DOI: 10.1016/s2468-2667(18)30127-0] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Revised: 06/14/2018] [Accepted: 06/18/2018] [Indexed: 11/17/2022]
Abstract
BACKGROUND Transmission of infection through international travel is a growing health issue, and the frequency of imported infection is increasing in China. We aimed to quantify the total number of infections imported into mainland China by arriving travellers. METHODS We actively surveyed arriving travellers at all 272 international entry-exit ports in mainland China. Suspected cases were detected through fever screening, medical inspection, self-declaration, and reporting by on-board staff. Participants completed a standardised questionnaire with questions about demographics, their travel itinerary (including detailed information about all countries or regions visited), and clinical manifestations. Nasopharyngeal swabs, sputum samples, faecal samples, vomitus, blood, and serum were collected as appropriate for diagnoses. Diagnosis was made by specific laboratory tests according to the national technical guidelines. Infections were classified as respiratory, gastrointestinal, vector-borne, blood-transmitted and sex-transmitted, or mucocutaneous. We divided arriving travellers into two groups: travellers coming from countries other than China, and travellers coming from Hong Kong, Macau, and Taiwan. We integrated surveillance data for 2014-16, calculated incidences of travel-related infections, and compared the frequency of infections among subgroups. FINDINGS Between Jan 1, 2014, and Dec 31, 2016, 22 797 cases were identified among 805 993 392 arriving travellers-an overall incidence of 28·3 per million. 45 pathogens were detected in participants: 18 respiratory (19 662 cases), ten gastrointestinal (189 cases), seven vector-borne (831 cases), seven blood-transmitted and sex-transmitted (1531 cases), and three mucocutaneous (584 cases). Both the overall number and incidence of infection were more than five times higher in 2016 than in 2014. Case numbers and incidences also varied substantially by province, autonomous region, and municipality. Overall, 17 643 (77%) infections were detected by fever screening, but 753 (49%) blood-transmitted and sex-transmitted infections were identified through medical inspection. 14 305 (73%) cases of respiratory infection and 96 (51%) of gastrointestinal infections were in tourists. Tuberculosis, hepatitis A virus, vector-borne, and blood-transmitted and sex-transmitted infections were common among Chinese labourers who worked abroad. Dengue and malaria were most commonly diagnosed in travellers arriving from Africa. 12 126 (93%) of the 12 985 cases arriving from Hong Kong, Macau, or Taiwan were respiratory infections. Hand, foot, and mouth disease accounted for 2·90% of infections in travellers from Hong Kong, Macau, or Taiwan and 0·31% of infections in international travellers. INTERPRETATION This report is the first to characterise the profile of travel-related infections among arriving travellers in mainland China. Our findings should increase public awareness of the potential risk of imported infections, and help health-care providers to make evidence-based health recommendations to travellers. FUNDING The Natural Science Foundation of China.
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Affiliation(s)
- Li-Qun Fang
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China; Institute of EcoHealth, Shandong University, Jinan, China
| | - Yu Sun
- Institute of EcoHealth, Shandong University, Jinan, China; University of Chinese Academy of Sciences, Beijing, China
| | - Guo-Ping Zhao
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China; The Logistics University of the Chinese People's Armed Police Force, Tianjin, China
| | - Li-Juan Liu
- Institute of Health Quarantine, The Chinese Academy of Inspection and Quarantine, Beijing, China
| | - Zhe-Jun Jiang
- Institute of Health Services and Transfusion Medicine, Academy of Military Medical Science, Beijing, China
| | - Zheng-Wei Fan
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Jing-Xue Wang
- Institute of Health Services and Transfusion Medicine, Academy of Military Medical Science, Beijing, China
| | - Yang Ji
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China
| | - Mai-Juan Ma
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China; Institute of EcoHealth, Shandong University, Jinan, China
| | - Juan Teng
- State Key Surveillance Laboratory of Vector-borne Infectious Diseases, Hainan Customs District, Haikou, China
| | - Yan Zhu
- International Travel Healthcare Center, Xining Customs District, Xining, China
| | - Ping Yu
- Xi'an Xian Yang Airport Customs House, Xian Yang, China
| | - Kai Li
- International Travel Healthcare Center, Ningxia Customs District, Yinchuan, China
| | - Ying-Jie Tian
- University of Chinese Academy of Sciences, Beijing, China
| | - Wu-Chun Cao
- State Key Laboratory of Pathogen and Biosecurity, Beijing Institute of Microbiology and Epidemiology, Beijing, China; Institute of EcoHealth, Shandong University, Jinan, China.
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Salama M, Amitai Z, Lustig Y, Mor Z, Weiberger M, Chowers M, Maayan S, Zimhony O, Ben-Ami R, Chazan B, Zaltzman-Bershadsky N, Cohen R, Tsyba E, Sheffer R, Anis E, Glazer Y, Pessah S, Mendelson E, Leshem E. Outbreak of West Nile Virus disease in Israel (2015): A retrospective analysis of notified cases. Travel Med Infect Dis 2018; 28:41-45. [PMID: 30016649 DOI: 10.1016/j.tmaid.2018.07.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Revised: 07/12/2018] [Accepted: 07/13/2018] [Indexed: 11/29/2022]
Abstract
BACKGROUND West Nile Virus (WNV) is mosquito-borne virus that is endemic in Israel. In 2015, national disease surveillance demonstrated a sharp increase in disease cases, with 149 cases diagnosed. METHODS Clinical data was extracted from the patients' medical files and laboratory analysis on blood, cerebrospinal fluid or urine was carried out. Data on climate was extracted from the Israel Meteorological Service. RESULTS Neuroinvasive disease was reported in 70% of cases and case-fatality rate was 16%. Simultaneously with the outbreak, an intense heat wave and an upsurge in summer temperatures occurred. CONCLUSIONS Clinical data shows substantial morbidity and mortality of WNV disease in Israel. Climatic measures are consistent with previous reports and point to the importance of temperature monitoring and rapid implementation of preventive environmental measures during the summer to reduce potential mosquito breeding sites. WNV disease should be suspected as a cause of fever or neurologic disease in travelers returning from endemic countries.
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Affiliation(s)
- Matanelle Salama
- Tel Aviv District Health Office, Ministry of Health, Tel Aviv, Israel.
| | - Ziva Amitai
- Tel Aviv District Health Office, Ministry of Health, Tel Aviv, Israel
| | - Yaniv Lustig
- Central Virology Laboratory, Ministry of Health, Tel-Hashomer, Israel
| | - Zohar Mor
- Tel Aviv District Health Office, Ministry of Health, Tel Aviv, Israel
| | - Miriam Weiberger
- Infectious Disease Unit, Assaf Harofeh Medical Center, Israel; Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | | | - Shlomo Maayan
- Division of Infectious Diseases, Barzilai Medical Center, Israel
| | - Oren Zimhony
- Infectious Diseases, Kaplan Medical Center, Israel
| | - Ronen Ben-Ami
- Infectious Diseases Unit, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel; Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel
| | | | | | - Regev Cohen
- Infectious Diseases Unit, Sanz Medical Center, Laniado Hospital, Israel
| | - Evgenia Tsyba
- Division of Infectious Diseases, Barzilai Medical Center, Israel
| | - Rivka Sheffer
- Tel Aviv District Health Office, Ministry of Health, Tel Aviv, Israel
| | - Emilia Anis
- Division of Epidemiology, Ministry of Health, Jerusalem, Israel
| | - Yael Glazer
- Division of Epidemiology, Ministry of Health, Jerusalem, Israel
| | - Silvia Pessah
- Division of Epidemiology, Ministry of Health, Jerusalem, Israel
| | - Ella Mendelson
- Central Virology Laboratory, Ministry of Health, Tel-Hashomer, Israel
| | - Eyal Leshem
- Sackler School of Medicine, Tel Aviv University, Tel Aviv, Israel; Internal Medicine C', The Chaim Sheba Medical Center, Tel Hashomer, Israel
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10
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Lindquist L. Recent and historical trends in the epidemiology of Japanese encephalitis and its implication for risk assessment in travellers. J Travel Med 2018; 25:S3-S9. [PMID: 29718434 DOI: 10.1093/jtm/tay006] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 01/17/2018] [Indexed: 01/30/2023]
Abstract
Japanese encephalitis is a major disease in many countries in Asia often visited by both leisure and non-leisure travellers. Although reported cases of Japanese apoptosis (JE) in travellers are relatively few, there are indications that both the number of cases might be underreported and that changes in the epidemiological situation in these parts of Asia may increase the risk, especially non-leisure travellers. Although JE mainly is considered a rural disease urban cases are seen the large economic growth and urbanization of previously rural areas in many for JE high-endemic areas may further add to the risk for JE, especially for business travellers, when visiting newly established peri-urban areas. This review will address these dynamic and unpredictable risks for JE and discuss its possible implications for the traveller.
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Affiliation(s)
- Lars Lindquist
- Karolinska Institutet, Karolinska University Hospital, SE 141 86 Huddinge, Sweden; Clinic for Infectious Diseases Huddinge I63; SE 141 86 Huddinge, Sweden
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11
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Popescu CP, Florescu SA, Cotar AI, Badescu D, Ceianu CS, Zaharia M, Tardei G, Codreanu D, Ceausu E, Ruta SM. Re-emergence of severe West Nile virus neuroinvasive disease in humans in Romania, 2012 to 2017-implications for travel medicine. Travel Med Infect Dis 2018; 22:30-35. [PMID: 29544774 DOI: 10.1016/j.tmaid.2018.03.001] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 02/25/2018] [Accepted: 03/11/2018] [Indexed: 02/04/2023]
Abstract
BACKGROUND In Romania, after a major outbreak in 1996, West Nile neuroinvasive disease (WNND) was reported only in a limited number of cases annually. During 2016-2017, a significant increase in the number of WNND cases was reported at the national level, associated with high mortality rates. METHODS A retrospective analysis of all cases confirmed with WNND, hospitalized during 2012-2017 in a single tertiary facility from Bucharest was performed in order to determine the annual prevalence and mortality rate and the risk factors associated with a severe outcome. RESULTS 47 cases were confirmed as WNND. The mortality rate was 25.5%, all death occurred during 2016-2017. Coma, confusion, obtundation, sleepiness and depressed deep tendon reflexes were symptoms predicting a severe outcome. In a univariate analysis age (p < 0.001), associated cancers (p = 0.012) and low levels of chloride in the CSF (p = 0.008) were risk factors for mortality. In a multinomial logistic analysis, age older than 75 years remained the only independent predictor of death in WNND. CONCLUSIONS The increase in both the number and the mortality rate of WNND cases suggest a changing pattern of WNV infection in Romania. Public health authorities and clinicians should be aware of the risk of severe WNV infection in travelers returning from Romania.
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Affiliation(s)
- Corneliu Petru Popescu
- Carol Davila University of Medicine and Pharmacy, Bucharest, Romania; Dr Victor Babes Clinical Hospital of Infectious and Tropical Diseases, Bucharest, Romania; ESCMID Study Group for Infectious Diseases of the Brain, Basel, Switzerland; ESCMID Study Group for Infections in Travellers and Migrants, Basel, Switzerland.
| | - Simin Aysel Florescu
- Carol Davila University of Medicine and Pharmacy, Bucharest, Romania; Dr Victor Babes Clinical Hospital of Infectious and Tropical Diseases, Bucharest, Romania
| | - Ani Ioana Cotar
- Laboratory for Vector-Borne Infections, Cantacuzino National Institute for Research, Bucharest, Romania
| | - Daniela Badescu
- Laboratory for Vector-Borne Infections, Cantacuzino National Institute for Research, Bucharest, Romania
| | - Cornelia Svetlana Ceianu
- Laboratory for Vector-Borne Infections, Cantacuzino National Institute for Research, Bucharest, Romania
| | - Mihaela Zaharia
- Dr Victor Babes Clinical Hospital of Infectious and Tropical Diseases, Bucharest, Romania; ESCMID Study Group for Infectious Diseases of the Brain, Basel, Switzerland; ESCMID Study Group for Infections in Travellers and Migrants, Basel, Switzerland
| | - Gratiela Tardei
- Dr Victor Babes Clinical Hospital of Infectious and Tropical Diseases, Bucharest, Romania
| | - Daniel Codreanu
- Dr Victor Babes Clinical Hospital of Infectious and Tropical Diseases, Bucharest, Romania
| | - Emanoil Ceausu
- Dr Victor Babes Clinical Hospital of Infectious and Tropical Diseases, Bucharest, Romania
| | - Simona Maria Ruta
- Carol Davila University of Medicine and Pharmacy, Bucharest, Romania; Stefan S Nicolau Institute of Virology, Bucharest, Romania
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Connor B, Bunn WB. The changing epidemiology of Japanese encephalitis and New data: the implications for New recommendations for Japanese encephalitis vaccine. TROPICAL DISEASES TRAVEL MEDICINE AND VACCINES 2017; 3:14. [PMID: 28883984 PMCID: PMC5537987 DOI: 10.1186/s40794-017-0057-x] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/23/2017] [Accepted: 07/11/2017] [Indexed: 11/10/2022]
Abstract
The epidemiology of Japanese Encephalitis and risk to the traveler has changed and continues to evolve. The spread of Japanese Encephalitis virus into new environments, changes in agricultural practice and animal vectors, climate change, peri-urban growth, changes in international travel to Asia, personal risk factors, mosquito vector free transmission, interactions with other flaviviruses and better information on infections without encephalitis and other factors make Japanese Encephalitis an underappreciated risk. There has also been a change in the incidence of Japanese Encephalitis cases that questions the current travel duration and geographic based recommendations. A safe, effective vaccine (Ixiaro) that may be administered in a short course regimen is now available in the United States without the risks of the previous vaccine. However, the vaccine is significantly underutilized. These changes in the epidemiology and new data on the risks of the Japanese Encephalitis virus require a review of the practice guidelines and expert recommendations that do not reflect the current state of knowledge.
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Affiliation(s)
- Bradley Connor
- The New York Center for Travel and Tropical Medicine, Weill Medical College of Cornell University, 110 East 55th Street, 16th Floor, New York, NY 10022 USA
| | - William B Bunn
- Medical University of South Carolina, University of Illinois at Chicago School of Public Health, Chicago, USA
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Yu S, Ji C, Zhu X, Xue J, Wang L, Wang Y. Impact of Bacillus sphaericus exposure on Anopheles dirus's fecundity and resistance development. Parasitol Res 2016; 116:859-864. [PMID: 28012029 DOI: 10.1007/s00436-016-5358-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2016] [Accepted: 12/18/2016] [Indexed: 11/30/2022]
Abstract
Mosquitoes are important vectors of many infectious diseases. Bacillus sphaericus (Bs) is an ideal larvicide and has attracted more and more attention, recently. However, the fundamental research of its application is very limited, especially on the subsequent impact of Bs exposure on mosquito's fecundity and resistance emergence. Through bioassay, LC50 and LC95 of Bs in killing Anopheles dirus larvae were determined as 9.793 ± 1.878 IU/L and 62.4 ± 6.438 IU/L at 48 h posttreatment, 7.128 ± 0.913 IU/L and 34.385 ± 12.547 IU/L at 72 h post treatment, respectively. After being treated with a sub-lethal dose of Bs, gravidity, oviposition, hatch, pupation, and eclosion of the surviving mosquitoes were counted and analyzed to elucidate the subsequent effects of Bs exposure on the reproductive capacity of A. dirus. The result interestingly showed that the exposure of Bs significantly reduced the oviposition ability of the surviving A. dirus, without effect on egg formation/gravidity, hatch, pupation, and eclosion. The surviving mosquitoes were also maintained routinely for generations to test the sustained effect of Bs exposure on the fecundity of the offsprings. After conventional breeding for generations, the capacity of egg laying totally recovered. To explore the rules of resistance development, bioassays were performed after treatment twice with a sub-lethal dose of Bs on two continuous generations of A. dirus larvae. The killing efficacies between the Bs treated group and control group were compared. The results showed that LC50 and LC95 increased by 4.35- and 7.37-folds after treatment with the sub-lethal dose of Bs on two consecutive generations, respectively. The results indicated that A. dirus was sensitive to Bs, which could reduce oviposition of the surviving A. dirus. The subsequent effect might help to further decrease the mosquito population. However, a sub-lethal dose of Bs exposure could easily cause resistance development. Our study provides a dose standard and reference for the rational use of Bs, which will be helpful for mosquito control.
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Affiliation(s)
- Shasha Yu
- Institute of Tropical Medicine, Third Military Medical University, Chongqing, 400038, China
| | - Chen Ji
- Institute of Tropical Medicine, Third Military Medical University, Chongqing, 400038, China.,The 17th Students' Camp, Third Military Medical University, Chongqing, 400038, China
| | - Xiaobo Zhu
- Institute of Tropical Medicine, Third Military Medical University, Chongqing, 400038, China.,The 17th Students' Camp, Third Military Medical University, Chongqing, 400038, China
| | - Jinwei Xue
- Institute of Tropical Medicine, Third Military Medical University, Chongqing, 400038, China.,The 17th Students' Camp, Third Military Medical University, Chongqing, 400038, China
| | - Luhan Wang
- Chongqing Foreign Language School, Chongqing, 400039, China
| | - Ying Wang
- Institute of Tropical Medicine, Third Military Medical University, Chongqing, 400038, China.
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Abstract
Yellow fever is a vector-borne disease endemic to tropical regions of Africa and South America. A recent outbreak in Angola caused hundreds of deaths. Six cases of yellow fever imported from Angola were reported recently in China. This raised the question of whether it will spread in China and how it can be prevented. This article discusses the possibility of yellow fever transmission in China and the strategies to counter it.
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Affiliation(s)
- Jun Chen
- Department of Infectious Diseases, Shanghai Public Health Clinical Center, Fudan University
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