The Guiana dolphin, Sotalia guianensis, is a small cetacean species found on the Atlantic coast of Central and South America from Honduras to Santa Catarina State, Brazil. The nematode Halocercus brasiliensis infects this cetacean, resulting in lung pathologies and death. The present study aimed to conduct a morphological and morphometric study of specimens of H. brasiliensis collected from S. guianensis from the coast of the state of Espírito Santo, Brazil. For this study, 7 dolphins were collected and examined for the presence of lung parasites. Nematodes were collected and processed for light microscopy, and lung fragments were processed for histological analysis. The nematodes were identified as H. brasiliensis according to their morphology and morphometry. The histopathological analysis revealed mineralization of the bronchiolar cartilage and inflammatory process. The parasitic infections by H. brasiliensis in S. guianensis can contribute to the debilitating status of these cetaceans, resulting in their stranding and accidental capture in fishing nets.

中文翻译：

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来自巴西的圭亚那海豚Sotalia guianensis的肺虫Halocercus brasiliensis（Nematoda：Pseudaliidae）具有病理发现。

圭亚那海豚，Sotalia guianensis，是一种小型鲸类动物，发现于中美洲和南美洲的大西洋沿岸，从洪都拉斯到巴西圣卡塔琳娜州。巴西线虫Halocercus感染了该鲸类，导致肺部疾病和死亡。本研究旨在对巴西圣埃斯皮里托州海岸沿岸的s。guianensis采集到的巴西橡胶杆菌标本进行形态学和形态计量学研究。在这项研究中，收集了7只海豚并检查了肺寄生虫的存在。收集线虫并进行光学显微镜处理，并对肺碎片进行组织学分析。根据线虫的形态和形态将其鉴定为巴西H. 组织病理学分析显示细支气管软骨矿化和炎症过程。guianensis中的H. brasiliensis寄生虫感染可导致这些鲸类动物的衰弱状态，导致它们搁浅和意外捕获在渔网中。