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首页> 美国卫生研究院文献>International Journal for Parasitology: Parasites and Wildlife >Parasitic development in intestines and oocyst shedding patterns for infection by Eimeria uekii and Eimeria raichoi in Japanese rock ptarmigans Lagopus muta japonica protected by cages in the Southern Japanese Alps
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Parasitic development in intestines and oocyst shedding patterns for infection by Eimeria uekii and Eimeria raichoi in Japanese rock ptarmigans Lagopus muta japonica protected by cages in the Southern Japanese Alps

机译：受日本南部阿尔卑斯山笼子保护的日本雷鸟（Lagopus muta japonica）的肠道寄生虫和卵囊脱落模式感染艾美球虫（Eimeria uekii）和艾美球菌（Eimeria raichoi）

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The population of Japanese rock ptarmigan ( ), an endangered species with a habitat above the timberline of the southern Japanese Alps, has declined. As one of the recent conservation strategies for this species, cage protection for broods (hens and chicks) has been introduced in their habitats. Two species of have frequently been detected in these birds, but little is known about the parasitic circulation in the region, including among birds and in the environment. Here, we conducted histopathology examinations of dead chicks collected under cage protection in 2018, and examined the feces of the hens and chicks of three broods and environmental soils for parasites in 2019 in order to assess the potential sources of infection and pathogenicity. Developmental zoites were found in the epithelial mucosa and/or the submucosa from the duodenum to the colon of all dead chicks. Fecal examination revealed oocysts of and/or in all hens and chicks. Oocysts of spp. per gram of feces in chicks increased within 2 weeks after hatching and then gradually deceased. Following infection of the chicks, oocysts could accumulate within the cage areas, and oocyst density exceeded more than 1000 oocysts per gram of cage soils. Based on having sporulated morphologies, oocysts could be infective and therefore, be direct or indirect potential sources of infection. However, based on our findings that not all chicks were clinically affected by the infections, other factors such as microbial flora in the chicks established by coprophagy or from the habitat environment, including climate, might be associated with the pathogenicity of spp., although further studies are needed to assess these correlations.
机译：日本岩雷鸟（）是一种濒临灭绝的物种，其栖息地在日本南部阿尔卑斯山的林线以上，其种群数量有所减少。作为该物种的近期保护策略之一，已在其栖息地中引入了对雏鸡（母鸡和小鸡）的笼子保护。在这些鸟类中经常发现了两种，但对该地区的寄生虫循环知之甚少，包括鸟类之间和环境中。在这里，我们对2018年在笼子保护下收集的死亡小鸡进行了组织病理学检查，并在2019年检查了三只雏鸡和环境土壤中的母鸡和小鸡的粪便中是否有寄生虫，以评估潜在的感染和致病性来源。在所有死亡小鸡的十二指肠到结肠的上皮粘膜和/或粘膜下层中发现了发育的动物。粪便检查发现所有母鸡和小鸡的卵囊和/或全部。 spp的卵囊。孵化后2周内，小鸡每克粪便中的每克粪便增加，然后逐渐死亡。感染小鸡后，卵囊可能会在笼区内积聚，卵密度超过每克笼土1000多个卵囊。基于孢子形的形态，卵囊可能具有感染性，因此是直接或间接的潜在感染源。然而，根据我们的发现，并不是所有的雏鸡都在临床上受到感染的影响，其他因素，例如通过共性繁殖或从栖息地环境（包括气候）建立的雏鸡中的微生物菌群，可能与该菌的致病性有关。需要进行研究以评估这些相关性。

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