전북 진안에서 채집한 쯔쯔가무시 매개 털진드기 밀도
Density of Chigger Mites as Tsutsugamushi Vectors Collected from Jinan, Jeollabuk-do
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질병관리본부에서는 매개체로 인한 전파 확산에 대처하고자전국 권역별 기후변화 매개체 감시사업을 실시하고 있으며 일환으로 전북 진안지역의 쯔쯔가무시 매개체인 털진드기 분포 조사와 병원체 검사를 위해 채집기와 야생설치류 포획을 실시하였다. 털진드기 종 분류를 위해 9∼12월 둘째주까지 매주 1회씩, 총 20개의 채집기를 이용하여 채집한 결과 총 개체수는 8종 611 마리가 채집되었다. 종 분류 결과는 둥근혀털진드기(N. tamiyai) 434마리(71.0%)로 가장 많이 분리되었다. 야생설치류 포획으로 털진드기 채집은 66마리의 설치류를 포획해서 털진드기 총3,050마리 채집되어 chigger index는 46.2로 나타났다. 월별chigger index는 11월 206.1로 가장 높았다. 병원체 보유여부검사결과 총 85개의 pools중 5월과 9월에 각각 1개의 pools에서 양성을 확인하였다. 이러한 결과는 쯔쯔가무시증 환자가 빈번히 발생하는 봄과 가을철의 시기와도 일치하였다.
Abstract
The Korea Centers for Disease Control and Prevention is conducting surveillance of climate change vectors across all regions in Korea to counteract the spread of these vectors. As a part of this surveillance project, wild rodents were captured using traps to investigate the spread of chigger mites, the vector of Tsutsugamushi disease, across Jeonbuk, Jinan region, and to conduct studies on pathogens. Twenty samplers were used to sample chigger mites weekly from September to November in four different locations. Six hundred and eleven chigger mites of eight varying types were captured. The largest number of captured chigger mites was N. tamiyai, with 434 samples (71.0%). With the addition of 66 wild rodents captured from traps, 3,050 chigger mites were sampled, which yielded a Chigger index of 46.2. The monthly Chigger index was highest in November with a value of 206.1. the result of the test conducted in the presence of pathogens showed two positive results, each from May and September, out of all 85 pools. This result was aligned with the increased frequency in tsutsugamushi disease cases in spring and fall seasons.
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