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Cooperative Sentinel Surveillance of Malaria in Laiza and Nearby Areas of Myanmar and Importation Threat Monitoring—China,2019–2023

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China CDC weekly 2024年第17期6卷 378-382页

作者： Peng Tian Shigang Li Yaowu Zhou Zurui Lin Xiaodong Sun Xiangrui Guo Chunli Ding Kaixia Duan Qiyan Chen Yulong Zhao Jing Wu Dakhidam Yaw Bee Jianwei Xu yunnan Institute of Parasitic diseases Yunnan Provincial Key Laboratory of Vector-borne Disease Control and ResearchYunnan International Joint Laboratory of Tropical Infectious DiseasesPuer CityYunnan ProvinceChina Yingjiang County Center for Disease control and Prevention Yingjiang CountyYunnan ProvinceChina Laiza City Hospital Laiza TownKachin Special Region IIMyanmar

Introduction:Laiza and nearby areas(LNA)in Myanmar are identified as the primary malaria hotspots in the bordering regions of yunnan Province,***:Six sentinel surveillance sites were established at the China-Myanmar border in LNA to monitor *** from 2019 was used as a baseline to analyze malaria incidence and trends in LNA and Myanmar,as well as the importation of malaria cases into China from 2019 to ***:Plasmodium vivax was the predominant species,representing 99.95%(14,060/14,066)of confirmed malaria cases in LNA.A total of 8,356 malaria cases were identified in 2023,with an annual parasite incidence(API)of 19.78 per 100 *** to 2019,the incidence rate ratio was 21.47(95%confidence interval:18.84,24.48),indicating that the API in 2023 was 21.47 times higher than that in *** yunnan,out of 1,016 reported cases,545 imported cases(53.64%)originated from LNA and spread to 18(13.95%)out of 129 *** provinces in China,including yunnan,reported imported malaria cases from LNA in ***:The increase in population,particularly among internally displaced persons,along with inadequate healthcare services,has led to a notable resurgence of malaria in *** resurgence poses a risk to preventing the re-emergence of malaria transmission in *** is an urgent need for novel collaborative policies,as well as financial and technical assistance,to enhance malaria control efforts in LNA,Myanmar.

关键词： Malaria Myanmar originated

Decreases in Both the Seroprevalence of Serum Antibodies and Seroprotection against Japanese Encephalitis Virus among Vaccinated Children

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Virologica Sinica 2019年第3期34卷 243-252页

作者： Ran Wang Lyu Xie Na Gao Dongying Fan Hui Chen Peigang Wang Hongning Zhou Jing An Department of Microbiology School of Basic Medical Sciences. Chinese Capital Medical UniversityBeijing 100069China yunnan provincial key laboratory of vector-borne Disease control and research Yunnan Institute of Parasitic DiseasesPu'er 665000China Center of Epilepsy Beijing Institute for Brain DisordersBeijing 100069China

The incidence of Japanese encephalitis(JE)has significantly decreased in China due to JE *** this study,we investigated the post-JE vaccination seroprevalence and protection provided by vaccinated sera against Japanese encephalitis virus(JEV)to elucidate the persistence and waning of antibodies to JEV among JE-SA14-14-2-vaccinated children.A total of 300 serum samples were collected from vaccinated children aged 3-10 years in Zhaotong,yunnan,*** seroprevalence of anti-JEV antibodies was determined by enzyme-linked immune sorbent assay and plaque reduction neutralization *** highest seropositivity of 82%was observed in vaccinated children during the first 0.5-1.5 years after booster ***,the seropositivity began to decline and remained lower than the original level observed in the 0.5-1.5-year *** association was found between the waning of seroprevalence and elapsed time of the post-booster ***,the neutralizing antibody(nAb)titres gradually decreased over time,and the levels showed a positive correlation with the protective efficacy in *** finding suggests that nAbs play an important role in the antiviral process and that the nAb titre is an adequately credible parameter for evaluating the protective efficacy induced by the JE *** results provide data that clarify the persistence and waning of antibodies to JEV,which may help elucidate the pathogenesis of JE.

关键词： Japanese encephalitis virus(JEV) SA14-14-2 Seroprevalence Neutralizing antibodies Waning of antibody

Malaria from hyperendemicity to elimination along international borders in yunnan, China during 2003‒2020: a case study

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Infectious diseases of Poverty 2022年第3期11卷 69-80页

作者： Hui Liu Yaowu Zhou Yan Deng Zurui Lin Canglin Zhang Qiyan Chen Chun Wei Kaixia Duan Peng Tian Hongning Zhou Jianwei Xu yunnan Institute of Parasitic diseases Yunnan Provincial Centre of Malaria ResearchYunnan Provincial Key Laboratory of Vector-Borne Diseases Control and ResearchYunnan Institute of Parasitic Diseases Innovative Team of Key Techniques for Vector Borne Disease Control and PreventionTraining Base of International Scientific Exchange and Education in Tropical Diseases for South and Southeast AsiaPuer665000China

Background: Border malaria is one of the most intractable problems hindering malaria elimination *** of both the human population and anopheline mosquitoes infected with Plasmodium *** cause cross-border malaria *** yunnan border area was still hyperendemic for malaria in the early part of this *** objective of this case study was to analyze the strategies,interventions and impacts of malaria control and elimination in the yunnan border *** text: A total of 10,349 malaria cases and 17.1 per 10,000 person-years of annual parasite incidence(API)were reported in the border area in *** on natural village-based stratification,integrated interventions,including mass drug administration for radical cures and preventive treatment,clinically presumptive treatment of all febrile patients for malaria and indoor residual spraying or dipping bed nets with insecticides were successfully carried out from 2003 to *** overall API was reduced to 0.6 per 10,000 person-years by 2013,while effective cross-border collaboration interventions dramatically reduced the malaria burden in the neighbouring border areas of *** 2014 forward,the comprehensive strategy,including universal coverage of surveillance to detect malaria cases,a rapid response to possible malaria cases and effective border collaboration with neighbouring areas,successfully eliminated malaria and prevented reintroduction of malaria transmission in the yunnan border ***: In yunnan malaria burden has successfully reduced by dynamically accurate stratification and comprehensive interventions;and then the region achieved elimination and prevented reintroduction of malaria transmission through intensive surveillance,rapid response and border *** border areas should perform their own intervention trials to develop their own effective strategy.

关键词： Malaria control Elimination Border area International collaboration yunnan China

Malaria control along China-Myanmar Border during 2007–2013: an integrated impact evaluation

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Infectious diseases of Poverty 2016年第1期5卷 680-690页

作者： Jian-Wei Xu Yong Li Heng-Lin Yang Jun Zhang Zai-Xing Zhang Ya-Ming Yang Hong-Ning Zhou Joshua Havumaki Hua-Xian Li Hui Liu Hua Zhou Xin-Yu Xie Jia-Xiang Dong Yue Zhang Xiao-Ying Sun Bo Li Jia-Yin Li Yang-Hui Tian Pi-Yu Wang Ben-Fu Li yunnan Institute of Parasitic diseases Yunnan Provincial Center of Malaria ResearchYunnan Provincial Collaborative Innovation Center for Public Health and Disease Prevention and ControlYunnan Provincial Key Laboratory of Vector-borne Diseases Control and ResearchPuer 665000China yunnan provincial Health and Family Planning Commission Kunming 650200People’s Republic of China yunnan Office of Health Poverty Action Kunming 650041People’s Republic of China World Health Organization Regional Office for the Western Pacific P.O.Box 29321000 ManilaPhilippines Foundation for Innovative New Diagnostics 1216 CointrinGenevaSwitzerland

Background:Implementing effective interventions remain a lot of difficulties along all border *** emergence of artemisinin resistance of Plasmodium falciparum strains in the Greater Mekong Subregion is a matter of great *** has effectively controlled cross-border transmission of malaria and artemisinin resistance of *** along the China-Myanmar ***:A combined quantitative and qualitative study was used to collect data,and then an integrated impact evaluation was conducted to malaria control along the China-Myanmar border during ***:The parasite prevalence rate(PPR)in the five special regions of Myanmar was decreased from 13.6%in March 2008 to 1.5%in November *** with the baseline(PPR in March 2008),the risk ratio was only 0.11[95%confidence interval(CI),0.09-0.14]in November 2013,which is equal to an 89%reduction in the malaria *** parasite incidence(API)across 19 Chinese border counties was reduced from 19.6 per 10000 person-years in 2006 to 0.9 per 10000 person-years in *** with the baseline(API in 2006),the API rate ratio was only 0.05(95%CI,0.04-0.05)in 2013,which equates to a reduction of the malaria burden by 95.0%.Meanwhile,the health service system was strengthened and health inequity of marginalized populations reduced along the international ***:The effective collaboration between China,Myanmar and the international non-governmental organization promptly carried out the core interventions through simplified *** integrated approaches dramatically decreased malaria burden of Chinese-Myanmar border.

关键词： Border malaria control Artemisinin resistance China-Myanmar border

Perinatal Vertical Transmission of Chikungunya Virus in Ruili, a Town on the Border between China and Myanmar

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Virologica Sinica 2021年第1期36卷 145-148页

作者： Jia-Yuan Shen Man Li Lyu Xie Jia-Rong Mao Hong-Ning Zhou Pei-Gang Wang Jin-Yong Jiang Jing An yunnan Institute of Parasitic diseases Simao Pu0er 665000China Ruili People’s Hospital Ruili 678600China yunnan provincial key laboratory of vector-borne diseases control and research and yunnan provincial Collaborative Innovation Center for Public Health and Disease Prevention and control(YPCICPHDPC) Simao Pu0er 665000China Department of Microbiology School of Basic Medical SciencesCapital Medical UniversityBeijing 100069China

Dear Editor,Chikungunya virus(CHIKV),an arbovirus in the family of Togaviridae,genus Alphavirus,is transmitted by the *** or *** mosquito,and causes disease in humans characterized by fever,rash,and arthralgia(Silva and Dermody 2017;Suhrbier 2019).It was first reported in 1953 in Tanzania,and caused only a few outbreaks and sporadic cases in Africa and Asia in last ***,in the epidemic in 2004,CHIKV acquired mutations that conferred enhanced transmission by the *** mosquito(Schuffenecker et al.2006).Since then,it has successively caused outbreaks in Africa,the Indian Ocean,South East Asia,the South America,and Europe(Zeller et al.2016).

关键词： al. Chi successively

Identification and Molecular Characterization of a New Omono River Virus Isolated from Culex Tritaeniorhynchus in yunnan, China

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Virologica Sinica 2021年第1期36卷 152-154页

作者： Yawei Zhang Xin Qiang Xiaofang Guo Honghong Peng Si Qin Yujun Cui Hang Fan Hongning Zhou Jiusong Zhang Jinglin Wang Yigang Tong State key laboratory of Pathogen and Biosecurity Beijing Institute of Microbiology and EpidemiologyBeijing 100071China yunnan provincial key laboratory of vector-borne diseases control and research Yunnan Institute of Parasitic DiseasesPu’er 665000China Beijing Advanced Innovation Center for Soft Matter Science and Engineering(BAIC-SM) College of Life Science and TechnologyBeijing University of Chemical TechnologyBeijing 100029China

Dear Editor,The family Totiviridae contains non-enveloped,doublestranded RNA viruses with genomes of approximately 4.6–7 kbp in *** totiviruses are classified into five genera:Totivirus,Victorivirus,Trichomonasvirus,Giardiavirus,and Leishmaniavirus(Nibert 2007).They are associated with latent infections of fungal or protozoan hosts(Li et al.2020).Recently,a few totiviruses have been identified and shown to have unexpected host distributions,including insects,plants.

关键词： al. latent Molecular

Establishment of a non-lethal model of antibody-dependent enhancement of infection in A129 mice based on a non-mouse-adapted dengue virus strain

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Zoological research 2023年第5期44卷 943-946页

作者： Han Wang Ming-Wang Long Li Zhang Yue Pan Jun-Ying Chen Kai Feng Qiang-Ming Sun Institute of Medical Biology Chinese Academy of Medical Sciences&Peking Union Medical CollegeKunmingYunnan 650118China yunnan key laboratory of Vaccine research&Development on Severe Infectious diseases KunmingYunnan 650118China yunnan key laboratory of vector-borne Infectious Disease KunmingYunnan 650118China Department of Clinical laboratory Guizhou Provincial People's HospitalGuiyangGuizhou 550002China

DEAR EDITOR,Dengue fever(DF),caused by dengue virus(DENV)infection,is a highly prevalent mosquito-borne infectious *** development of antiviral drugs and vaccines relies on the clinical utility of dengue infection mod... 详细信息

关键词： infection drugs clinical

Seroepidemiologic study on convalescent sera from dengue fever patients in Jinghong,yunnan

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Virologica Sinica 2022年第1期37卷 19-29页

作者： Yingshuo Ma Man Li Lyu Xie Na Gao Dongying Fan Kaihao Feng Yao Yao Yong Zhou Ziyang Sheng Hongning Zhou Hui Chen Jing An Department of Microbiology School of Basic Medical SciencesCapital Medical UniversityBeijing100069China yunnan Institute of Parasitic diseases Pu’er665000China People's Hospital of Xishuangbanna Dai Autonomous Prefecture Xishuangbanna666100China Xishuangbanna Mental Health Center Xishuangbanna666100China yunnan provincial key laboratory of vector-borne diseases control and research and yunnan provincial Collaborative Innovation Center for Public Health and Disease Prevention and control(YPCICPHDPC) Pu’er665000China Experimental Center for Basic Medical Teaching School of Basic Medical SciencesCapital Medical UniversityBeijing100069China

After dengue virus(DENV)infection,antibody-dependent enhancement(ADE)is easy to occur when the neutralizing antibody(NAb)gradually decreases to a sub-neutralizing *** this cohort surveillance,we utilized sera samples collected from dengue fever patients at different convalescent phases in Jinghong City,to investigate the dynamic change rule of DENV-specific antibodies,and to analyze the risk of ADE caused by secondary infection with heterologous serotypes *** baseline serosurvey,191 four-year and 99 six-year sera samples during convalescence were collected in 2017 and 2019,*** positive rate of DENVspecific immunoglobulin G was 98.4%in 2017,which significantly decreased to 82.8%in *** geometric mean titer(GMT)of NAb decreased from 1:155.35 to 1:*** 290 overall samples,73 paired consecutive samples were used for follow-up *** four-year sera,the GMTs of NAb against DENV-3 and cross-reactive antibodies against DENV-1,DENV-2 and DENV-4 were 1:167.70,1:13.80,1:18.54 and 1:45.26,respectively,which decreased to 1:53.18,1:10.30,1:14.60 and 1:8.17 in six-year *** age-stratified analysis,due to the increasing number of ADE positive samples from 2017 to 2019 in 31–40 and 51–60 years groups,the risk of ADE in DENV-4 infection was positively associated with the extension of convalescent phase,and the odd ratio was higher than other *** the recovery period lengthened,the risk of secondary infection with DENV-1 and DENV-2 was *** results offer essential experimental data for risk prediction of severe dengue in hyper-endemic dengue areas,and provide crucial scientific insight for the development of effective dengue vaccines.

关键词： Dengue virus(DENV) Seroepidemiology Neutralizing antibody(NAb) Cross-reactive antibody Antibody dependent enhancement(ADE)

Malaria:elimination tale from yunnan Province of China and new challenges for reintroduction

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Infectious diseases of Poverty 2021年第4期10卷 86-89页

作者： Heng-Lin Yang Zulqarnain Baloch Jian-Wei Xu Xiao-Dong Sun Zu-Rui Lin Yao-Wu Zhou Xiao-Tao Zhao Quan Lv Shi-Yuan Xu Chun-Li Ding Qi-Yan Chen Peng Tian Kai-Xia Dung Xue-Shan Xia Hong-Ning Zhou yunnan provincial key laboratory of vector-borne diseases control and research&yunnan Innovative Team of key Techniques for vector-borne Disease control of Yun nan In stitute of Parasitic diseases Pu'er 665000YunnanChina Faculty of Life Science and Technology Kunming University of Science and TechnologyKunming 650500YunnanChina

Background::Eradication of infectious disease is the sanctified public health and sustainable development goal around the *** body::Three antimalarial barriers were developed to control imported malarial cases,and an effective surveillance strategy known as the"1-3-7 approach"was developed to eliminate malaria from the Chinese *** 2011 to 2019,5254 confirmed malaria cases were reported and treated in yunnan Province,*** them,4566 cases were imported from other countries,and 688 cases were indigenous from 2011 to *** 2017,no new local malarial case has been reported in ***,malaria has been completely eliminated in yunnan ***,malaria is detected in overseas travellers on a regular basis,such as visitors from neighbouring ***::Hence,the strategies should be further strengthened to maintain a robust public health infrastructure for disease surveillance and vector control programs in border *** programs should be supported technically and financially by the government to avert the possibility of a malarial resurgence in yunnan Province.

关键词： Malaria Eliminate Southeast asia yunnan China