Uchikawa K, Kawamori F, Kanda T, Kumada N
Department of Parasitology, Shinshu University School of Medicine, Nagano, Japan.
J Med Entomol. 1994 Nov;31(6):844-9. doi: 10.1093/jmedent/31.6.844.
Using the Tullgren funnel method, we surveyed for trombiculid larvae around dwellings and in mandarin orange groves on the slopes of Sengenyama and Maruyama, Yamakita Town, Kanagawa Prefecture, Japan, during the period between 8 October 1992 and 8 January 1993. In total, 6,690 trombiculid larvae, consisting of 6,669 Leptotrombidium scutellare (Nagayo, Mitamura, Tamiya & Tenjin), 13 L. fuji Kuwata, Berge & Philip, two L. himizu (Sasa, Kumada, Hayashi, Enomoto, Fukuzumi & Obata), two Neotrombicula japonica (Tanaka, Kaiwa, Teramura & Kagaya), one Gahrliepia saduski Womersley, and three Walchia ogatai Sasa & Teramura, were taken from 240 soil samples (40 samples, six times at intervals of 2-4 wk). From the above species composition, L. scutellare is suspected to be the sole vector of scrub typhus in the survey area, where the disease is known to be caused by two serotypic strains of Rickettsia tsutsugamushi Ogata, Kawasaki and Kuroki. L. scutellare larvae rapidly increased in number in late October to form an acuminate peak of abundance in early November, followed by a gradual wane.
1992年10月8日至1993年1月8日期间，我们采用杜尔格伦漏斗法，对日本神奈川县山北町仙根山和丸山山坡上的住宅周围及柑橘园中恙螨幼虫进行了调查。总共从240份土壤样本（40份样本，每隔2 - 4周采集6次）中采集到6690只恙螨幼虫，其中包括6669只小板纤恙螨（长与太、三田村、田村、天神）、13只富士纤恙螨（桑田、贝格、菲利普）、2只日向纤恙螨（笹、熊田、林、榎本、深津、小畑）、2只日本新恙螨（田中、河轮、寺村、加贺谷）、1只佐氏加勒恙螨（沃默斯利）和3只绪方氏瓦尔恙螨（笹、寺村）。从上述物种组成来看，在已知由恙虫病东方体（绪方、川崎、黑木）的两种血清型菌株引起恙虫病的调查区域，小板纤恙螨疑似是恙虫病的唯一传播媒介。小板纤恙螨幼虫数量在10月下旬迅速增加，在11月初形成一个尖锐的数量高峰，随后逐渐减少。
