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首页> 外文期刊>Journal of Parasitology >Two new Eimeria species parasitic in corncrakes (Crex crex) (Gruiformes: Rallidae) in the United Kingdom.
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Two new Eimeria species parasitic in corncrakes (Crex crex) (Gruiformes: Rallidae) in the United Kingdom.

机译：英国玉米corn（Crex crex）（Gruiformes：Rallidae）寄生的两种新的艾美叶虫物种。

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摘要

In this study we describe 2 new species of coccidia (Apicomplexa: Eimeriidae) parasites isolated from the feces of corncrake (Crex crex) (Gruiformes: Rallidae), bred in captivity in the U.K. Oocysts of Eimeria crecis n. sp. were approximately spherical and measured 15.3 micro m (13-18) x 14.3 (12-16), providing an oocyst shape index of 1.1. A micropyle and oocyst residuum were absent, but a polar granule was present. Oocysts of Eimeria nenei n. sp. were ellipsoidal and measured 23.6 (21-26) x 18.1 (17-20), providing an oocyst shape index of 1.3. A micropyle and polar granule were present. Surveying free-living, wild adult corncrakes in Scotland (U.K.) demonstrated both parasite species to be widespread. These are the first species described to infect the corncrake, and they are distinct from those previously found to infect members of the closely related crane family (Gruiformes: Gruidae). Partial amplification and sequencing of the 18S rRNA gene and internal transcribed spacer 2 indicated a close relationship between the 2 proposed new species as a group distinct from the Eimeria species known to infect cranes. These newly identified parasite species have been associated with enteric disease in corncrakes being prepared for reproduction in captivity and reintroduction into England (U.K.).
机译：在这项研究中，我们描述了从玉米cra（Crex crex）（Gruiformes：Rallidae）的粪便中分离出来的2种新球菌（Apicomplexa：Eimeriidae）寄生虫，它们在英国Eimeria crecis n的卵囊中人工饲养。 sp。它们的卵泡形状近似为球形，尺寸为15.3微米（13-18）x 14.3（12-16），提供的卵囊形状指数为1.1。没有小孔和卵囊残留物，但存在极性颗粒。艾美尔球虫的卵囊。 sp。呈椭圆形，尺寸为23.6（21-26）x 18.1（17-20），提供的卵囊形状指数为1.3。存在微粒和极性颗粒。在苏格兰（英国）对自由活动的野生成年玉米龟进行了调查，结果表明这两种寄生虫物种都很普遍。这些是被描述为感染玉米脆的第一个物种，并且与先前发现的感染密切相关的起重机家族成员的物种不同（Gruiformes：Gruidae）。 18S rRNA基因和内部转录间隔区2的部分扩增和测序表明，这2个提议的新物种与已知感染起重机的艾美球虫不同，它们之间存在密切的联系。这些新发现的寄生虫物种与准备在圈养中繁殖并重新引入英国（英国）的玉米cra中的肠道疾病有关。

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