The vector mosquito surveillance is important when recommending prevention and control measures. The surveillance of the vectors were conducted at a total of 7 locations with light emitting diode (LED traps) and BG-Sentinel traps from March to November, 2023 in Gyeongnam province. In the surveillance, a total of 13 species belonging to seven genera were collected in a total of 6,537 females and 51.9/trap/night (Trap Index; TI) in 2023. Among the collection sites, Gangseo-gu at the pigsty in Busan with a LED trap recorded the highest TI 60.6 (Species Ratio; SR 65.6%) for Culex tritaeniorhynchus females in 2023. Each one of Cx. tritaeniorhynchus female was firstly collected for 2023 at Eulsukdo in Busan at 22th March. In the results of isolation of viral RNA, Flavivirus were positive in one pool (Chaoyang virus; 30 individuals) of Aedes vexans and negative in 341 pools (4,152 individuals) of 12 mosquito species including Cx. tritaeniorhynchus, Cx. pipiens, Aedes vexans, Ae. albopictus, and Ochlerotatus togoi in 2023.

• Hye-Rim Ju(Department of Health & Environment, Kosin University, Busan, 49104)
• Jae-Soon Park(Department of Health & Environment, Kosin University, Busan, 49104)
• Chang-Jun Lee(Department of Health & Environment, Kosin University, Busan, 49104)
• Suvin Cho(Department of Health & Environment, Kosin University, Busan, 49104)
• Hyunji Shin(Department of Health & Environment, Kosin University, Busan, 49104)
• Sun Ho Jung(Department of Health & Environment, Kosin University, Busan, 49104)
• So-Eun Shin(Division of Vectors and Parasitic Diseases, Korea Disease Control and Prevention Agency, Osong, 28159)
• Dong-Kyu Lee(Department of Health & Environment, Kosin University, Busan, 49104)