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.

Systematic and parasite-host relationship by Baruscapillaria appendiculata in Phalacrocorax brasilianus collected from Marajó Island, State of Pará, Brazil

“…That was due to the high parasitic load of capillariids in the cloaca, differing from the types of cellularity present in the inflammatory infiltrate as described by Pinto et al (2008) recorded B. obsignata in Meleagris gallopavo (Linnaeus), which caused thickening of the intestinal crypts and villi, together with a mild infiltrated mixed inflammatory picture, in the presence of mononuclear cells and heterophils. That also differs from Carvalho et al (2021) who described histological changes caused by capillariids of the species Eucoleus contortus in the esophagus of the bird Cairina moschata (Linnaeus), in which the inflammatory infiltrate predominantly consisted of eosinophils.…”