Parker R J
Aust Vet J. 1982 Feb;58(2):47-50. doi: 10.1111/j.1751-0813.1982.tb02685.x.
Experiments were done to explore the possible relationship between cattle, Australian dog ticks (Rhipicephalus sanguineus) and Anaplasma marginale. Calves' ears were exposed to larval, nymphal and adult ticks on 8, 9 and 7 occasions, respectively. The immature instars fed readily, but the adults attached very poorly to calves. Transtadial transmission of A. marginale was achieved on 6 occasions from 9 attempts: ticks infected as larvae or nymphs were able to transmit at the subsequent stage or stages. Transovarial transmission was not achieved. Six calves supported more than one infestation of ticks. Attached ticks caused the calves no apparent discomfort and calves developed no noticeable skin reactions. An abattoir survey of 200 hides detected no R. sanguineus.
开展了实验以探究牛、澳大利亚犬蜱（血红扇头蜱）和边缘无形体之间可能存在的关系。分别在8次、9次和7次情况下，将牛犊的耳朵暴露于幼虫、若虫和成虫蜱。未成熟阶段的蜱很容易进食，但成虫很难附着在牛犊身上。在9次尝试中有6次实现了边缘无形体的经变态传播：感染幼虫或若虫阶段的蜱能够在后续阶段进行传播。未实现经卵传播。6头小牛承受了不止一次蜱虫侵扰。附着的蜱未给小牛造成明显不适，小牛也未出现明显的皮肤反应。对200张兽皮进行的屠宰场调查未检测到血红扇头蜱。
