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Seasonal prevalence and species composition of mosquitoes and chigger mites collected from Daegu, Gunwi and Sangju in South Korea, 2014

  • Choi, Moon Bo (Institute of Plant Medicine, Kyungpook National University) ;
  • Lee, Wook-Gyo (Division of Medical Entomology, Center for Immunology and Pathology, Korea National Institute of Health) ;
  • Kang, Hyun Jun (School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University) ;
  • Yang, Sung-Chan (Division of Medical Entomology, Center for Immunology and Pathology, Korea National Institute of Health) ;
  • Song, Bong Gu (Division of Medical Entomology, Center for Immunology and Pathology, Korea National Institute of Health) ;
  • Shin, E-Hyun (Division of Medical Entomology, Center for Immunology and Pathology, Korea National Institute of Health) ;
  • Kwon, Ohseok (School of Applied Biosciences, College of Agriculture and Life Sciences, Kyungpook National University)
  • Received : 2016.12.29
  • Accepted : 2017.02.15
  • Published : 2017.03.31

Abstract

Background: As the habitat changes in Korea due to climate change, the emergence of disease-mediated vectors is increasing rapidly. Thus for the surveillance of mosquito- and chigger mite-borne disease, their seasonal prevalence and species composition were investigated at seven locations in Daegu, Gunwi and Sangju. Methods: Mosquitoes were collected twice every month from five collection sites using a black light and BG sentinel traps in Daegu and Gunwi from April through November. Chigger mites were investigated twice per month from wild rodents caught with Sherman live traps in Gunwi and Sangju from April through May and September through November. Results: A total of 2,361 female mosquitoes were collected. Cowshed (626 individuals, Trap index (TI) 44.7) and Kyungpook National University campus (846 individuals, TI 60.4) in Daegu had the highest number of mosquitoes in the black light and BG sentinel trap, respectively. The mosquitoes were collected more by BG sentinel trap than the black light trap. Nine mosquito species were trapped, and the Culex pipiens complex was the most commonly mosquito (1,397 individuals, 59.2%), followed by Anopheles sinensis (554 individuals, 23.5%). Anopheles sinensis (531 individuals, 51.9%) and Culex pipiens complex (1,142 individuals, 85.4%) were the most mosquitoes from black light and BG sentinel trap, respectively. In terms of seasonal prevalence, the highest abundance was in July, with 824 individuals collected. In chigger mites, eighty-one wild rodents of five species that are hosts of chigger mites were collected; among them, 53 and 25 individuals of Apodemus agrarius and Crocidura suaveolens, respectively were trapped. Leptotrombidium pallidum was a dominant species, with 2,467 individuals collected (67.8%). Conclusions: The mosquito was the dominant species in Culex pipiens complex and the highest in July and August. Apodemus agrarius was most abundant in wild rats and Leptotrombidium pallidum was dominant in the collected chigger mites.

Keywords

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