Meister Seraina L, Wenker Christian, Wyss Fabia, Zühlke Irene, Berenguer Veiga Inês, Basso Walter U
Institute of Parasitology, Department of Infectious Diseases and Pathobiology, Vetsuisse Faculty, University of Bern, Länggassstrasse 122, CH-3012, Bern, Switzerland.
Zoo Basel, Binningerstrasse 40, CH-4054, Basel, Switzerland.
Int J Parasitol Parasites Wildl. 2022 Apr 21;18:76-81. doi: 10.1016/j.ijppaw.2022.04.007. eCollection 2022 Aug.
Syngamosis is a disease caused by the strongylid nematode which infects the respiratory tract of various bird species around the world. The parasite appears to be harmful for a wide variety of avian orders, occasionally leading to a fatal outcome, particularly in young birds. The aim of this study was to examine the parasitic fauna in deceased or euthanized, free-ranging white storks nesting at the Zoo Basel in 2019 and 2020; and to assess the extent to which these parasites contributed to the wild birds' death. In five out of 24 necropsied white storks, an infection with was diagnosed based on morphological analysis of adult nematode stages and eggs, in combination with PCR amplification and sequencing of DNA extracted from female worms. The main pathological changes affected the white storks' respiratory tract and a mixed cell tracheitis was diagnosed in the histopathological examination of three of the five infected birds. Some birds displayed additional lesions compatible with syngamosis, namely partially degenerated parasitic structures with concurrent granulomatous inflammation in the lung and multifocal acute hemorrhages in the bronchi and parabronchi. Coprological examinations (fecal flotation technique, fecal sedimentation technique, sodium acetate acetic acid formalin procedure and Ziehl-Neelsen staining) from the intestinal content as well as a PCR for on brain, lung, heart, liver, and spleen tissue yielded negative results in all examined individuals. In the absence of further major pathological findings, was assumed to have significantly contributed to the death of the infected birds.
比翼线虫病是一种由圆线虫纲线虫引起的疾病，这种线虫会感染世界各地多种鸟类的呼吸道。这种寄生虫似乎对多种鸟类目都有危害，偶尔会导致致命后果，尤其是在幼鸟中。本研究的目的是检查2019年和2020年在巴塞尔动物园筑巢的死亡或安乐死的自由放养白鹳体内的寄生虫群落；并评估这些寄生虫对野生鸟类死亡的影响程度。在24只接受尸检的白鹳中，有5只根据成虫线虫阶段和虫卵的形态分析，结合从雌虫提取的DNA进行PCR扩增和测序，被诊断感染了[此处原文缺失具体寄生虫名称]。主要病理变化影响白鹳的呼吸道，在5只受感染鸟类中的3只进行组织病理学检查时诊断出混合细胞性气管炎。一些鸟类还表现出与比翼线虫病相符的其他病变，即肺部部分退化的寄生结构并伴有肉芽肿性炎症，以及支气管和副支气管的多灶性急性出血。对肠道内容物进行的粪便检查（粪便浮选技术、粪便沉淀技术、醋酸钠醋酸福尔马林程序和齐-尼氏染色）以及对脑、肺、心脏、肝脏和脾脏组织进行的[此处原文缺失具体寄生虫名称]PCR检测，在所有检查个体中均得出阴性结果。在没有其他主要病理发现的情况下，[此处原文缺失具体寄生虫名称]被认为对受感染鸟类的死亡有重大影响。
