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KMID : 1143420200130140807
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Public Health Weekly Report
2020 Volume.13 No. 14 p.807 ~ p.816
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Surveillance of tick density in the Republic of Korea, 2019
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Noh Byung-Eon
Lee Wook-Gyo
Lee Hee-Il
Cho Shin-Hyeong
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Abstract
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Ticks are infectious agent vectors that transmit various pathogens such as viruses, bacteria, rickettsia and parasites. Tickborne diseases in the Republic of Korea (ROK) include severe fever with thrombocytopenia syndrome (SFTS) virus, Lyme disease, tick-borne encephalitis (TBE), arthropod-associated bacteria and parasites. To prevent the spread of tick-borne diseases, a nationwide surveillance of ticks was monitored. To conduct the surveillance, 16 regions and 4 environments (grave sites, grasslands, copses, and mountain trails) were selected from 16 centers for vector surveillance in climate change and surveyed from April to November 2019. In this survey, 107,863 ticks, comprising three genera and five species, were collected. The results that Haemaphysalis longicornis was the most predominant species at all collection sites (97.9%). Successively, H. flava ranked second at 2,081, (1.9%), followed by Ixodes nipponensis (163, 0.2%), Amblyomma testudinarium (32, <0.1%), and H. japonica (10, <0.1%). In terms of environmental density, 44,008 ticks were collected in grasslands (40.8%), 22,409 were collected at grave sites (20.8%), 20,732 were collected in copses (19.2%), and 20,714 were collected on mountain roads (19.2%). This survey found that tick density correlated with changes in the number of SFTS patients after one month (R2 = 0.4043). As tick-borne diseases increase in the ROK, continuous surveillance of geological and climatic factors is critical for public health. Therefore, this study recommended expanding the number of collection sites and periods of investigation for ticks.
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KEYWORD
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centers for vector surveillance in climate change, tick, Severe Fever with Thrombocytopenia Syndrome
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Listed journal information
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