Kitaoka M, Asanum K, Otsuji J
J Hyg Epidemiol Microbiol Immunol. 1976;20(2):195-200.
The chicken is available as a bait animal for the study of vector mites and has been found to be infected by chigger mite bite in an area endemic of scrub typhus. L. pallidum and L. palpale were reconfirmed to be zoophilic for the chicken. It is suggested a walking bird can serve as a vector--carrying mites from one place to another. R. orientalis can persist subclinically for a certain period in the spleen and liver of chickens placed on the gound endemic of scrub typhus. Specimens of L. pallidum, 22 in number, collected from chickens placed on the ground of an endemic area in Akita Prefecture were found rickettsia-positive. Both strains isolated from bait chickens and L.pallidum collected from host chickens were identified as a Kato type of R. orientalis.
鸡可作为研究媒介螨的诱饵动物，并且在恙虫病流行地区已发现鸡被恙螨叮咬感染。苍白纤恙螨和触纤恙螨再次被确认为对鸡有嗜动物性。有人提出，活动的鸟类可作为将螨从一个地方携带到另一个地方的媒介。东方立克次体在恙虫病流行地区地面饲养的鸡的脾脏和肝脏中可亚临床持续存在一定时期。从秋田县流行地区地面饲养的鸡身上采集的22只苍白纤恙螨标本被发现立克次体呈阳性。从诱饵鸡分离的菌株和从宿主鸡采集的苍白纤恙螨均被鉴定为东方立克次体的加藤型。
