133103 20260217205500.0 doi 10.1177/03009858241235393 sideral 137877 ART-2024-137877 eng Pérez, Estela Universidad de Zaragoza Mannheimia haemolytica associated fibrinonecrotizing abomasitis in lambs 2024 Access copy available to the general public Unrestricted 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. info:eu-repo/semantics/openAccess by https://creativecommons.org/licenses/by/4.0/deed.es 1.7 2024 VETERINARY SCIENCES 58 / 170 = 0.341 2024 Q2 T2 PATHOLOGY 52 / 90 = 0.578 2024 Q3 T2 0.776 2024 Veterinary (miscellaneous) 2024 Q1 5.0 2024 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Uzal, Francisco A. de Miguel, Ricardo Rodríguez-Largo, Ana (orcid)0000-0002-2685-1730 Reséndiz, Raúl Streitenberger, Nicolás Macías-Rioseco, Melissa Gómez, Álex Universidad de Zaragoza (orcid)0000-0002-9723-9004 Calvo-Sánchez, Natalia Pérez, Marta Universidad de Zaragoza (orcid)0000-0002-8133-2124 Luján, Lluís Universidad de Zaragoza (orcid)0000-0002-2053-9842 Asín, Javier 1009 773 Universidad de Zaragoza Dpto. Patología Animal Área Sanidad Animal 1001 025 Universidad de Zaragoza Dpto. Anatom.,Embri.Genét.Ani. Área Anatom.Anatom.Patológ.Com 61, 4 (2024), 604-608 Vet. pathol. Veterinary Pathology 0300-9858 873450 http://zaguan.unizar.es/record/133103/files/texto_completo.pdf Versión publicada 2875816 http://zaguan.unizar.es/record/133103/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:133103 articulos driver 2026-02-17-20:21:43 ARTICLE