Immunohistochemical demonstration of Mycoplasma bovis in chronic lung lesions in feedlot cattl

Article Sidebar

Main Article Content

Rafael Ramírez Romero
Bernabé Chavarría Martínez
Alicia Magdalena Nevárez Garza
Luis Edgar Rodríguez Tovar
César Dávila Martínez
Gustavo Hernández Vidal
Jesús Jaime Hernández Escareño
Alfonso López Mayagoitia

Abstract

Bovine feedlots are intensive production systems of significant importance in Mexico, United States of America and Canada. Respiratory diseases are the single most important cause of morbidity and mortality in feedlot cattle. Herein, the gross and microscopic findings in the lungs of cattle with unusually persistent pneumonia unresponsive to aggressive antibiotic treatment in feedlots localized in General Escobedo, Nuevo Leon; Morelia, Michoacan; Mexicali, Baja California, and Culiacan, Sinaloa, Mexico are described. Eight chronic suppurative bronchopneumonia cases with multifocal areas of casseous necrosis were selected. Microscopically, these lesions were bronchocentric and characterized by foci of necrosis surrounded by a pyogranulomatous reaction. Immunohistochemical studies revealed positive reaction to Mycoplasma bovis in all cases. Gross and microscopic lesions associated with M. bovis pneumonia have a conspicuous pattern. This is the first report of M. bovis causing pneumonia in feedlot cattle in Mexico.
Keywords:
Mycoplasma bovis chronic pneumonias feedlot cattle

Article Details

License

Creative Commons License
Veterinaria México OA by Facultad de Medicina Veterinaria y Zootecnia - Universidad Nacional Autónoma de México is licensed under a Creative Commons Attribution 4.0 International Licence.
Based on a work at http://www.revistas.unam.mx
  • All articles in Veterinaria México OA re published under the Creative Commons Attribution 4.0 Unported (CC-BY 4.0). With this license, authors retain copyright but allow any user to share, copy, distribute, transmit, adapt and make commercial use of the work, without needing to provide additional permission as long as appropriate attribution is made to the original author or source.
  • By using this license, all Veterinaria México OAarticles meet or exceed all funder and institutional requirements for being considered Open Access.
  • Authors cannot use copyrighted material within their article unless that material has also been made available under a similarly liberal license.