Distribution of Eimeria uekii and Eimeria raichoi in cage protection environments for the conservation of Japanese rock ptarmigans (Lagopus muta japonica) in the Japanese Alps.
Distribution of Eimeria uekii and Eimeria raichoi in cage protection environments for the conservation of Japanese rock ptarmigans (Lagopus muta japonica) in the Japanese Alps.
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DOI：
10.1016/j.ijppaw.2021.05.004
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发表时间：
2021-08
期刊：
影响因子：
--
通讯作者：
Ushida K
中科院分区：
文献类型：
--
作者：
Matsubayashi M;Kobayashi A;Kaneko M;Kinoshita M;Tsuchida S;Shibahara T;Hasegawa M;Nakamura H;Sasai K;Ushida K
日本岩雷鸟（Lagopus穆塔japonica）在日本被列为濒危物种，仅在日本阿尔卑斯山发现。在过去的半个世纪，鸟类的数量已经减少，笼保护项目已在山区进行原位保护战略（日本岩雷鸟恢复计划的项目之一）。在笼保护期间，一些小鸡死亡，两个艾美耳球虫属，E. uekii和E.在小鸡身上发现了raichoi。在这里，我们检查了笼子内和周围环境中的土壤，以评估2020年7月至8月期间的潜在感染源。我们发现笼子里有大量的卵囊，特别是在雷鸟家族经常聚集的背面，但笼子外其他区域的土壤污染较少或根本没有污染。在15、20和25 ℃下，E. uekii分别为20、11和5 h; E. raichoi。我们的研究结果提出了一些疑问，鸡的食粪是感染源，因为鸡消耗新鲜盲肠粪便（约在1小时内），据我们所知，相反，保护鸡可能直接或间接感染卵囊在土壤或环境。笼养对保护日本岩雷鸟幼雏是有效的。笼子背面的土壤被艾美耳球虫高度污染。E.在15 °C的温度下，木麻黄能迅速产孢。受保护的雏鸡可能被土壤或环境中的卵囊感染。
Japanese rock ptarmigans, Lagopus muta japonica, are classified as an endangered species in Japan and are found only in the Japanese Alps. The number of birds has decreased in the last half century and cage protection projects have been undertaken as in situ conservation strategies (one of the projects for the recovery plan of Japanese rock ptarmigan) in the mountains. During the period with cage protections, some chicks died and two Eimeria spp., E. uekii and E. raichoi, were identified in the chicks. Here, we examined the soil within the cages and in the surrounding environment to assess potential sources of infection between July to August 2020. We found high numbers of oocysts in the cages, especially at the back sides where the ptarmigan family frequently congregated, but soils in other areas outside the cages were less contaminated or not contaminated at all. The time required for more than 50% of the oocysts to sporulate at 15, 20 and 25 °C for E. uekii was 20, 11, and 5 h, respectively, and 72, 48 and 18 h, respectively, for E. raichoi. Our results cast some doubt that coprophagia by chicks is the source of infection because chicks consumed fresh cecal feces (approximately within 1 h) as far as we know, and instead, the protected chicks might be directly or indirectly infected by oocysts in soils or the environment. Cage protection is effective for protecting chicks of Japanese rock ptarmigans. Soils at the back sides in the cages were highly contaminated with Eimeria spp. E. uekii can rapidly be sporulated at 15 °C in timber regions. Protected chicks might be infected by oocysts in soils or the environment.
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DOI：
10.1016/j.ijppaw.2018.06.005
发表时间：
2018-12
期刊：
International journal for parasitology. Parasites and wildlife
影响因子：
--
作者：
Matsubayashi M;Tsuchida S;Kobayashi A;Shibahara T;Nakamura H;Murata K;Ushida K
通讯作者：
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DOI：
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DOI：
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发表时间：
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期刊：
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DOI：
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发表时间：
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期刊：
International journal for parasitology. Parasites and wildlife
影响因子：
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