rectal stenosis in pigs associated with salmonella typhimurium and porcine circovirus type 2 (pcv2) infection
;Tatiane Terumi Negrão Watanabe;Priscila Zlotowski;Luiz Gustavo Schneider de Oliveira;Verônica Machado Rolim;Marcos José Pereira Gomes;Gustavo Snel;David Driemeier
AIP Conference Proceedings2011Vol. 31pp. 511-515
243
watanabe2011pesquisarectal
Abstract
Rectal stricture is an acquired annular fibrous constriction of the rectum that results from a variety of chronic necrotizing enteric diseases. In pigs, it is in most cases a sequel of Salmonella infection. Porcine circovirus type 2 (PCV2) is a known pathogen causing immunosuppression in pigs worldwide. PCV2 infected pigs may be predisposed to salmonellosis. In this report, rectal stenosis was observed in 160 pigs from a herd that experienced an outbreak of enteric salmonellosis over a 4-month period. Distension of the abdominal wall and diarrhea were the main clinical signs observed. Five animals were analyzed showing annular cicatrization of the rectal wall 5.0-7.0 cm anterior to the anorectal junction and Salmonella-positive immunostaining in the large intestine. Salmonella Typhimurium was isolated from fragments of the large intestine. Porcine circovirus type 2 antigen was observed in the mesenteric lymph-node in 4 pigs and in the large intestine in 3 pigs.