Mannheimia haemolytica -associated fibrinonecrotizing abomasitis in lambs.

Autor:	Pérez E; University of Zaragoza, Zaragoza, Spain.; AgriFood Institute of Aragon, Zaragoza, Spain., Uzal FA; University of California-Davis, San Bernardino, CA., de Miguel R; Anapath Services GmbH, Liestal, Switzerland., Rodríguez-Largo A; University of Zaragoza, Zaragoza, Spain.; AgriFood Institute of Aragon, Zaragoza, Spain., Reséndiz R; University of California-Davis, Tulare, CA., Streitenberger N; University of California-Davis, Davis, CA., Macías-Rioseco M; University of California-Davis, Tulare, CA., Gómez Á; University of Zaragoza, Zaragoza, Spain.; AgriFood Institute of Aragon, Zaragoza, Spain., Calvo-Sánchez N; University of Zaragoza, Zaragoza, Spain.; AgriFood Institute of Aragon, Zaragoza, Spain., Pérez M; University of Zaragoza, Zaragoza, Spain.; AgriFood Institute of Aragon, Zaragoza, Spain., Luján L; University of Zaragoza, Zaragoza, Spain.; AgriFood Institute of Aragon, Zaragoza, Spain., Asín J; University of California-Davis, San Bernardino, CA.
Jazyk:	angličtina
Zdroj:	Veterinary pathology [Vet Pathol] 2024 Jul; Vol. 61 (4), pp. 604-608. Date of Electronic Publication: 2024 Mar 05.
DOI:	10.1177/03009858241235393
Abstrakt:	Mannheimia haemolytica -associated abomasitis has been clinically described as a cause of sudden death in lambs, but it is poorly characterized. We describe the pathological features of a severe fibrinonecrotizing abomasitis in 3 lambs that died suddenly. All 3 abomasums had a thickened submucosa due to edema and necrotic areas delimited by bands of degenerate neutrophils with slender nuclei (oat cells) and angiocentric distributions. The overlying mucosa was congested. Myriads of gram-negative coccobacilli were observed within the oat cell bands. M. haemolytica was isolated from the abomasum in all 3 animals and was serotyped as A2 in one of them. Pericarditis and pleuritis were observed in 2 of the lambs. Clostridium spp. were isolated in 1 lamb and detected by immunohistochemistry in the 3 animals, suggesting clostridial co-infection. M. haemolytica should be considered among the differential diagnoses of necrotizing abomasitis in lambs. Competing Interests: Declaration of Conflicting InterestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.
Databáze:	MEDLINE
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