MOSQUITO SURVEILLANCE AND PATHOGEN DETECTION ANALYSIS IN JIANGSU PROVINCE FROM 2020 TO 2024
10.3969/j.issn.1005-0507.2026.03.005
- VernacularTitle:2020—2024年江苏省媒介蚊虫监测及病原检测分析
- Author:
Jian GAO
1
;
Hong-na CHEN
1
;
Zhi-ming WU
1
;
Wei-fang YANG
1
;
Hong-liang CHU
1
Author Information
1. Institute of Disinfection and Vector Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, Jiangsu, China; Jiangsu Provincial Medical Key Laboratory of Pathogenic Microbiology in Emerging Major Infectious Diseases, Nanjing 210009, Jiangsu, China
- Publication Type:Journal Article
- Keywords:
Mosquito pathogens;
Culex tritaeniorhynchus;
Japanese encephalitis virus;
Surveillance
- From:
Acta Parasitologica et Medica Entomologica Sinica
2026;33(3):187-191,203
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze mosquito species composition and prevalence of pathogens carried by mosquitoes in Jiangsu Province from 2020 to 2024 and to provide a scientific basis for the prevention and control of mosquito-borne diseases. Methods Mosquitoes were collected using CO2-baited traps. The presence of mosquito-borne pathogens including dengue virus, Japanese encephalitis virus, yellow fever virus, West Nile virus, Chikungunya virus, and Sindbis virus was tested using commercial kits for fluorescence-based quantitative PCR. Results The most prevalent mosquito species found across different regions of Jiangsu Province were Culex pipiens pallens and Cx. tritaeniorhynchus, accounting for 81.35% to 93.01% of the total, followed by Armigeres subalbatus and Anopheles sinensis, which comprised 5.89% to 15.85% of the total. The densities of other monitored mosquito species were relatively low. Pathogen detection revealed that, only Cx. tritaeniorhynchus tested positive for Japanese encephalitis virus nucleic acid, whereas the remaining four mosquito species tested negative for the nucleic acids of all other six pathogens. The overall positivity rate of Japanese encephalitis virus (JEV) in Cx. tritaeniorhynchus showed an initially increasing trend followed by a decrease and a subsequent increase. The peak detection rate occurred in 2021 (11.93%), with a much lower positive rate of 0.80% in 2023. Genotyping result revealed that all JEV strains in Jiangsu Province belonged to the G1 genotype and were genetically closest to the strain Shangdong08DY.29 (MN072875.1). Conclusions The incidence of Japanese encephalitis virus carried by mosquito, especially Cx. tritaeniorhynchus, in Jiangsu Province shows an upward trend, requiring sustained surveillance. A variety of monitoring method should be adopted to survey mosquitoes across different habitats, ensuring the accuracy and comprehensiveness of the monitoring result.
