2024 Annual Investigation of Insect Vectors in Equine Endemic Areas in Conghua District of Guangzhou City

ZHONG Jiangguo; HUANG Junjie; CHI Shihong; LI Yuze; LIN Junjie; WANG Yiqiao; LUO Haojian; LIU Yingying; MEI Kun; HUANG Shujian

doi:10.19978/j.cnki.xmsy.2025.05.16

Abstract：To understand the presence,distribution,activity patterns,and potential to carry pathogens related to diseases such as equine piroplasmosis,Japanese encephalitis,vesicular stomatitis,Trypanosomiasis,West Nile virus,African horse sickness,equine infectious anemia,and equine encephalomyelitis(both Eastern and Western forms),in the unregulated equine disease zones of Conghua District in Guangzhou,we established a monitoring framework.Taking Conghua District as the core area,set up 8 surrounding districts and counties as monitoring areas to capture mosquitoes and insects for monitoring.Through 3 surveys in May,July and September,8,177 mosquitoes,484 tabanids,655 midges and 529 ticks were caught.Among them,mosquitoes belong to 4 subfamilies,8 genera and 28 species,tabanids belong to 2 subfamilies,2 genera and 2 species,midges belong to 2 subfamilies,2 genera and 2 species,ticks belong to 1 subfamily,1 genus and 1 species.The dominant mosquitoes were culex brevicornis,Culex pseudosquemiculatus,Culex pipiens quinquefasciatus,chironomus,Tabanidae,Ceratopogonidae and Ixodes fanghead(Ixodes).In May,3,678 mosquitoes were collected,with a mosquito density of 2.36 mosquitoes per light trap hour.In July,2,562 mosquitoes were captured,yielding a density of 1.64 mosquitoes per light trap hour.In September,1,937 mosquitoes were collected,with a density of 1.24 mosquitoes per light trap hour.The number and density of mosquitoes decreased from March to September.The average density of Tabanids was 6.2/field,average density of midges was 8.3/field,and average density of ticks was 8.3/field.