Lesions caused by anisakid and capillariid in Cairina moschata raised on Marajó island, state of Pará, Brazil

ABSTRACT The Muscovy duck is a commercially important bird on the island of Marajó usually raised in a peculiar system that includes supplying fish viscera to the birds under semi-extensive farming conditions. This enables a risk of contamination and losses in the production of these birds, resulting from injuries caused by helminth infections, especially nematodes. The objective of this study was to evaluate the histopathological changes caused by nematodes of the genera: Eucoleus, Anisakis and Contracaecum. Thirty-three ducks with lesions in the esophagus and ventricle were analyzed. Histopathological exams showed a mild inflammatory infiltrate in the submucosa of the esophagus caused by the fixation of E. contortus and third stage larvae of Anisakis sp., and we recorded third stage larvae of Contracaecum sp. parasitizing the ventricle, this being the first record of this parasite in ducks in Brazil.

摘要：疣鼻栖鸭（Muscovy duck）是马拉若岛（Marajó）上具有重要商业价值的禽鸟，通常采用特殊养殖模式进行饲养：在半粗放养殖条件下向其投喂鱼内脏。该养殖模式存在污染风险，并可因蠕虫感染尤其是线虫感染引发的损伤，造成该禽鸟养殖过程中的损失。本研究旨在评估毛细线虫属（Eucoleus）、异尖线虫属（Anisakis）以及盲囊线虫属（Contracaecum）线虫所引发的组织病理学变化。本研究共分析了33只出现食道与肌胃病变的疣鼻栖鸭。组织病理学检查结果显示，扭曲毛细线虫（E. contortus）与异尖线虫属（Anisakis sp.）三期幼虫的固着作用可引发食道黏膜下层轻度炎性浸润；本研究同时记录到盲囊线虫属（Contracaecum sp.）三期幼虫寄生于肌胃中，这是巴西境内鸭类感染该寄生虫的首次记录。