RT info:eu-repo/semantics/article
T1 Production Significance of Bovine Respiratory Disease Lesions in Slaughtered Beef Cattle
A1 Fernández Fernández, Miguel
A1 Ferreras Estrada, María Del Carmen
A1 Giráldez García, Francisco Javier
A1 Benavides, Julio
A1 Pérez Pérez, Valentín
A2 Sanidad Animal
K1 Sanidad animal
K1 Pneumonia
K1 Respiratory
K1 Lung
K1 Bovine
K1 Impact
K1 Disease
K1 3109 Ciencias Veterinarias
AB [EN] Bovine respiratory disease (BRD) is still a serious concern in feedlots, where it exerts a negative effect on farm productivity. There is a shortage of studies focused on the evaluation of BRD-associated lesions at the slaughterhouse in clinically healthy animals. The objective of this work was to investigate the prevalence and type of subclinical pneumonic lesions in slaughtered beef cattle, according to the age range and management system, and its impact on carcass weight. A total of 1101 beef cattle intended for human consumption were examined at slaughter. Information on age, sex, management system and carcass weight was recorded. The presence and type of pneumonia were evaluated according to gross and microscopic findings and etiological agents by PCR. Lung pneumonic lesions appeared in 17.9% of animals and were predominant among veal calves. According to the type, chronic catarrhal pneumonia prevailed in the majority of animals, and mixed and extensively reared cattle were more likely to suffer acute fibrinous pneumonia. The presence of pneumonic lesions was associated with a significant decrease in carcass weight that had more of an impact in veal male calves coming from intensive systems. Bacterial infections were the predominant infectious agent and the only cause of acute fibrinous pneumonia, while viruses were infrequent and only found in lesions with chronic catarrhal pneumonia. This study shows the importance of BRD in beef feedlots upon production values and points out the feasibility of slaughterhouse assessment of pneumonia as a method for the evaluation of BRD significance.
PB MDPI
LK https://hdl.handle.net/10612/19314
UL https://hdl.handle.net/10612/19314
NO Fernández, M., Ferreras, M. D. C., Giráldez, F. J., Benavides, J., & Pérez, V. (2020). Production significance of bovine respiratory disease lesions in slaughtered beef cattle. Animals, 10(10), Article e1770. https://doi.org/10.3390/ANI10101770
NO © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
DS BULERIA. Repositorio Institucional de la Universidad de León
RD Jul 6, 2024