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KMID : 1143420160090511034
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Public Health Weekly Report
2016 Volume.9 No. 51 p.1034 ~ p.1039
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Monthly variation and SFTS virus infection rates of ixodid ticks collected in Boeun-gun, Chungcheongbuk-do, Republic of Korea (2014∼2015)
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Kim Seong-Yoon
Roh Jong-Yul
Song Bong-Goo
Park Won-Il
Ju Young-Ran
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Abstract
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BACKGROUND: Severe fever with thrombocytopenia syndrome (SFTS) is an emerging infectious disease transmitted to humans by tick bites. The aim of this study was to monitor tick population density and its SFTS virus infection rate in the Republic of Korea (ROK).
METHODOLOGY/RESULTS: From March 2014 to November 2015, ticks were collected monthly at four collection sites in Boeun-gun, Chungcheongbuk-do, ROK using a dry-ice bait trap and the flagging method. A total of 16,514 ixodid ticks, including 14,646 Haemaphysalis longicornis (88.7%), 1,839 H. flava (11.1%), and 29 Ixodes nipponensis (0.2%), were collected. Nymphs of ixodid ticks reached the peak in April or May. Adult ticks were collected from May to July while larval ticks were collected more frequently in September. Ticks were pooled (5,170 ticks in 464 pools) and tested by RT-PCR and nested PCR. The minimum infection rate of ticks was 0.27% (14 pools) consisting of 0.13% H. longicornis (6 pools) and 1.17% H. flava (8 pools).
CONCLUSION: ur results suggested that ixodid ticks were active from March to November, so personal protection for prevention of SFTS could be important during those months. In addition, we need to expand monitoring of SFTS virus among ixodid ticks population.
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KEYWORD
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