title: Pathological and parasitological characterization of infection by trematodes (Paramphistomatidae) in the large intestine of capybaras.
abstract: Gross and histological lesions caused by an intestinal parasite were described in three capybaras. The parasites presented a mean length of 14 mm and width of 7 mm, were round to oval or piriform, reddish and pedunculated, and adhered strongly to the mucosa of the large intestine. The intestinal mucosa at the parasite attachment site presented loss of surface epithelium and most glands, with replacement by fibrovascular proliferation that protruded from the mucosa and was involuted by the ventral sucker of the parasite. The lamina propria presented cellular debris, eosinophils, macrophages and plasma cells. The morphological characteristics, observed using serial histological sections, made it possible to classify the parasite as a trematode (Paramphistomatidae), compatible with Taxorchis schistocotyle. One capybara also harbored many ciliated protozoa in the large intestine (at the site of attachment of the parasite) and inside the caeca of the trematodes. In conclusion, this study described a multifocal necrotizing colitis associated with T. schistocotyle parasitism in capybaras.
authors.affiliation: Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, BR.
authors.forename: Isabela de Oliveira
authors.initials: Ide O
authors.lastname: Avelar
authors.affiliation: Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, BR.
authors.forename: Ana Patrícia Carvalho
authors.initials: AP
authors.lastname: Silva
authors.affiliation: Veterinary Pathology Service, Joint Pathology Center, Silver Springs, Maryland, US.
authors.forename: Chris
authors.initials: C
authors.lastname: Gardiner
authors.affiliation: Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, BR.
authors.forename: Renato de Lima
authors.initials: Rde L
authors.lastname: Santos
authors.affiliation: Departamento de Parasitologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, MG, BR.
authors.forename: Walter Dos Santos
authors.initials: Wdos S
authors.lastname: Lima
authors.affiliation: Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, MG, BR.
authors.forename: Roselene
authors.initials: R
authors.lastname: Ecco
mesh_terms: D000818:Animals; D005260:Female; D007411:Intestinal Diseases, Parasitic / Q000469:parasitology / Q000473:pathology / Q000662:veterinary*; D007420:Intestine, Large / Q000469:parasitology* / Q000473:pathology*; D010250:Paramphistomatidae; D012377:Rodentia / Q000469:parasitology*; D014201:Trematode Infections / Q000469:parasitology / Q000473:pathology / Q000662:veterinary*