title: Mannheimia haemolyticaandBibersteinia trehalosiSerotypes Isolated from Merino Breed Lambs in Extremadura (Southwestern Spain).
abstract: Pneumonia caused byMannheimia haemolyticais an important disease in ruminants. Because of its economic significance, several methods have been developed to study the pathogenicity and epidemiology ofM. haemolytica. In this study, bacterial isolates ofM. haemolyticaandBibersteinia trehalosiidentified from the lungs of sheep were serotyped by means of indirect haemagglutination. Of the 598 lungs studied, 34 isolates were identified and serotyped. In decreasing order,M. haemolyticaserotypes were: not typable (50 %), A1 (17.65 %), A7 (11.76 %), A6 (5.88 %), and A12, A2, A5 and A9 (each representing 2.94 %). The onlyB. trehalosiserotype was T4 (2.94 %). Serotypes A1, A6 and A7 ofM. haemolyticawere the most commonly isolated from pneumonic sheep producing greater changes in the lungs and having important implications for sheep production.
authors: Histology and Pathological Anatomy, Department of Animal Medicine, Faculty of Veterinary Medicine, University of Extremadura, Avda de la Universidad s/n, 10003 Cáceres, Spain.
authors: Sara
authors: S
authors: Fernández
authors: Histology and Pathological Anatomy, Department of Animal Medicine, Faculty of Veterinary Medicine, University of Extremadura, Avda de la Universidad s/n, 10003 Cáceres, Spain.
authors: Javier
authors: J
authors: Galapero
authors: Histology and Pathological Anatomy, Department of Animal Medicine, Faculty of Veterinary Medicine, University of Extremadura, Avda de la Universidad s/n, 10003 Cáceres, Spain.
authors: Luis
authors: L
authors: Gómez
authors: Biostatistics Unit, Department of Mathematics, Faculty of Veterinary Medicine, University of Extremadura, Avda de la Universidad s/n, 10003 Cáceres, Spain.
authors: Carlos J
authors: CJ
authors: Pérez
authors: Infectious Diseases Unit, Department of Animal Health, Faculty of Veterinary Medicine, Complutense University, Avda Puera de Hierro s/n, 28040 Madrid, Spain.
authors: Dolores
authors: D
authors: Cid
authors: Infectious Diseases Unit, Department of Animal Health, Faculty of Veterinary Medicine, Complutense University, Avda Puera de Hierro s/n, 28040 Madrid, Spain.
authors: M Carmen
authors: MC
authors: Martín
authors: Infectious Diseases Unit, Department of Animal Health, Faculty of Veterinary Medicine, University of Extremadura, Avda de la Universidad s/n, 10003 Cáceres, Spain.
authors: Juan Manuel
authors: JM
authors: Alonso
authors: Infectious Diseases Unit, Department of Animal Health, Faculty of Veterinary Medicine, University of Extremadura, Avda de la Universidad s/n, 10003 Cáceres, Spain.
authors: Joaquín
authors: J
authors: Rey
keywords: Bibersteinia trehalosi; Lambs; Lung lesion; Mannheimia haemolytica; Serotypes