Science and Mathematics Division, Eastern Oklahoma State College, Idabel, OK, 74745, USA.
Department of Microbiology and Immunology, Midwestern University, Glendale, AZ, 85308, USA.
Syst Parasitol. 2023 Feb;100(1):15-21. doi: 10.1007/s11230-022-10066-0. Epub 2022 Sep 7.
Compared to other commonly examined passerine birds for coccidian (Apicomplexa) parasites, little is available on the coccidia of birds of the family Hirundinidae, including barn swallows (Hirundo rustica). Feces was collected in May 2022 from two nesting H. rustica in McCurtain County, Oklahoma, USA; the samples contained oöcysts representing a new species of Isospora. Oöcysts of Isospora zimmermani n. sp. are subspheroidal to ovoidal with a smooth bi-layered wall, measure (L × W) 22.8 × 20.8 µm, and have a length/width (L/W) ratio of 1.1; a micropyle and oöcyst residuum were absent but polar granule(s) are present. Sporocysts are ellipsoidal to ovoidal and measure 15.2 × 9.6 µm, L/W 1.6; a knob-like Stieda body and a rounded sub-Stieda body are present. The sporocyst residuum is composed of compact spheroid with a dense, irregular mass of finer granules lying between and dispersed among the sporozoites. The new species represents only the second isosporan reported from H. rustica but the first from the USA, and fourth species documented from the avian family Hirundinidae. This article was registered in the Official Register of Zoological Nomenclature (ZooBank) as urn:lsid:zoobank.org:pub:1F1E71C3-56E8-4EA7-A9B0-1E585FAA9DE0.
与其他常用于检查球虫（孢子虫）寄生虫的雀形目鸟类相比，关于燕科鸟类的球虫，包括家燕（Hirundo rustica）的球虫知之甚少。2022 年 5 月，在美国俄克拉荷马州麦卡里恩县的两个筑巢的 H. rustica 中收集了粪便样本；这些样本中包含了一种新的等孢球虫代表种的卵囊。等孢球虫 Zimmermanni n. sp. 的卵囊呈亚球形到卵球形，具有光滑的双层壁，大小为（L×W）22.8×20.8 µm，长/宽（L/W）比为 1.1；无卵盖和卵囊残余物，但存在极粒。孢子囊呈椭圆形到卵球形，大小为 15.2×9.6 µm，L/W 为 1.6；存在一个类似棍棒的斯氏小体和一个圆形的次斯氏小体。孢子囊残余物由紧密的球体组成，球体之间和散布在其中的更细颗粒形成密集的不规则团块。该新种是仅有的第二种从 H. rustica 报道的等孢球虫，但却是美国的第一种，也是从燕科记录的第四种鸟类。本文已在动物命名法规官方登记处（ZooBank）注册，编号为 urn:lsid:zoobank.org:pub:1F1E71C3-56E8-4EA7-A9B0-1E585FAA9DE0。
