Seasonal occurrences of larval trombiculid mites found on wild rodents in Nodagawa River basin, Kyoto Prefecture.

概要

論文の詳細を見る
Surveys of larval trombiculid mites found on wild rodents were performed during the period from October 1994 to June 1997 in Nodagawa River basin, where is an endemic area of Tsutsugamushi disease in Kyoto Prefecture. Larval trombiculid mites classified to 6 genera and 12 species were recovered from 4 species of host rodents. Dominant species in these mites were Leptotrombidium pallidum, Leptotrombidium intermedium and Leptotrombidium palpale, followed by Gahrliepia saduski in Nodagawa River basin. Comparing with the infestation number of mites per host, significant differences were found between two species of hosts, Microtus montebelli and Apodemus speciosus. It was suggested that several species of trombiculid mites have a host preference was for M. montebelli rather thanA. speciosus. L. pallidum or L. intermedium larvae was found twice a year, from late autumn to early winter and from spring to early summer, on two species of host rodents, M. montebelli and A. speciosus. Regarding the emergence of trombiculid mites, larval activities were more remarkable in late autumn than early spring. On M. montebelli, seasonal occurrence patterens of these larvae synchronized with larval activities, but, whereas on A. speciosus, these patterns were more evident in early spring than in late autumn. It seemed that these trombiculid mites prioritize to increase a chance to become nymph than their preference for the host.
日本ダニ学会の論文