The potential role of blowflies in the transmission of taeniid tapeworm eggs
The potential role of blowflies in the transmission of taeniid tapeworm eggs
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丽蝇在绦虫卵传播中的潜在作用
DOI：
10.1017/s0031182000056572
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发表时间：
1985
期刊：
影响因子：
2.4
通讯作者：
M. Gemmell
中科院分区：
文献类型：
--
作者：
J. Lawson;M. Gemmell
在对 3 种丽丽蝇的实验室研究中，超过一半的丽蝇会从木屐粪便表面摄取带绦虫卵，一只苍蝇最多可摄入 5000 多个卵。大多数卵子在 48 小时内被排空，其中 38% 至 48% 的卵子失去了胚芽。在新西兰南岛进行的实地研究中，用狗粪便作为诱饵的诱捕器捕获了以下苍蝇物种（按丰度从高到低的顺序排列）：Hybopygia varia、Calliphora fourmaculata、C. hortona 和 C. stygia。高峰期集中在一月、二月和三月。近 25% 的野蝇在吸食被自然污染的带绦虫卵的狗粪便长达 3 毫米后捕获，其肠道内含有卵。当给羔羊施用时，所有 4 种苍蝇都会传播感染。冬天，在养有明显感染T. hydatigena的狗的狗舍附近的土地上吃草的羔羊比在更远的地方吃草的羊获得了更高的蠕虫负担。盛行风的顺风处的负担更大。将狗赶走后，在附近捕获的绿头苍蝇中含有带虫卵，但陷阱中的内容物却没有。当狗在场时，苍蝇以及在较小程度上粘在粘虫陷阱上的昆虫和灰尘，当给幼羊喂食时，会传播感染。
In laboratory studies with 3 species of Calliphora more than half were shown to ingest eggs of Taenia hydatigena from the surface of clog faeces with a maximum of over 5000 eggs in 1 fly. Most eggs were voided within 48 h and between 38 and 48% of these eggs had lost their embryophores. In field studies carried out in the South Island of New Zealand, traps baited with dog faeces captured the following blowfly species in decreasing order of abundance: Hybopygia varia, Calliphora quadrimaculata, C. hortona and C. stygia. Peak numbers were trapped in January, February and March. Almost 25% of wild flies, caught after feeding for up to 3 mm on dog faeces naturally contaminated with taeniid eggs, had eggs in their intestine. When administered to lambs all 4 species of fly transferred infection. Lambs grazed in winter on plots near kennels that had housed dogs with patent infections of T. hydatigena acquired higher worm burdens than those grazed further away. The burdens were greater downwind of the prevailing wind. After removal of the dogs, blowflies caught in the vicinity contained taeniid eggs but the contents of pitfall traps did not. Blowflies, and to a much lesser degree the insects and dust caught on sticky traps during the presence of the dogs, transferred infection when administered to naive lambs.