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KMID : 1143420220150231596
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Public Health Weekly Report
2022 Volume.15 No. 23 p.1596 ~ p.1605
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Surveillance of tick density in the Republic of Korea, 2021
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Noh Byung-Eon
Ju Jung-Won
Lee Hee-Il
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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), 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 from April to November, at 16 regions and 4 environments (graves, grasslands, copses, and mountain roads) with 16 centers for vector surveillance in climate change and investigated in 2021. In this monitoring, 67,540 ticks, comprising three genera and five species, were collected. The results that Haemaphysalis longicornis was the most predominant species at all collection sites (97.3%). Successively, H. flava ranked second at 716, (2.3%), followed by Amblyomma testudinarium (55, 0.2%), Ixodes nipponensis (33, 0.1%) and H. japonica (10, <0.1%). In terms of environmental density, 26,676 ticks were collected in grasslands (39.5%), following 17,108 ticks at copses sites (25.3%), 13,580 ticks in mountain roads (20.1%), and 10,176 ticks on graves (15.1%). Tick density (Trap Index, T.I; No, of collected tick/trap) in 2021 increased by 6.6% campared to 2020 and decreased by 21.9% compared to average of last 5 years. As tick-borne diseases increase in the ROK, continuous surveillance of geologicall and climatic factors is critical for public health. Therefore, this study recommended to analyze the distribution and ecology of ticks and to understand the epidemiology of tick-borne diseases and its risk to public health in the ROK
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KEYWORD
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Climate change, Vector, Tick, Surveillance
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