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Evaluation of the performance of slaughterhouse surveillance for bovine tuberculosis detection in Castilla y Leon, Spain

Artículo de investigación publicado en Preventive Veterinary Medicine

1 de abril de 2021

Post-mortem inspection (PMI) of routinely slaughtered cattle in abattoirs is an extremely valuable tool for detecting bovine tuberculosis (bTB) infected herds that can supplement active surveillance activities. However, its true performance is difficult to assess due to the multiple factors that may affect it. Here, we determined relative efficiencies in the detection of bTB-compatible lesions and probabilities of subsequent laboratory confirmation of abattoirs located in Castilla y Leon, one of the regions with the largest cattle population in Spain, between 2010 and 2017. The slaughtered animal population was split based on the results of the ante-mortem tests (reactors or non-reactors), and two generalized linear multivariable mixed models were fitted to each subpopulation to calculate the risk of lesion detection and laboratory confirmation per abattoir while accounting for the effect of potential confounding variables.
Throughout the 8-year period, ∼30,000 reactors and >2.8 million non-reactor animals in the ante-mortem tests were culled in the abattoirs under study. Bovine TB compatible lesions were detected in 4,710 (16%) reactors and 828 (0.03%) non-reactor animals, of which >95% were confirmed as infected through bacteriology. The probability of disclosure of bTB-like lesions was associated with the animal subpopulation, type of source unit, the herd size, the year of slaughter, the breed and age of the animal, and/or the season of slaughter. The probabilities of detection of bTB-like lesions varied largely depending on the abattoir in both subpopulations, ranging from 603 to 3,070 per 10,000 animals for the reactors and 0.2-16.1 per 10,000 animals for the non-reactor animals.
Results obtained here will help to quantify the performance of PMI in abattoirs in Castilla y Leon and the between-abattoir variability, and to identify animals at increased risk of having bTB-like lesions detected during PMI based on animal- and farm-related factors




Pozo P., Cespedes-Cardenas N., Bezos J., Romero B., Grau A., Nacar J., Saez JL., Minguez O. y Alvarez J..




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Evaluation of the performance of slaughterhouse surveillance for bovine tuberculosis detection in Castilla y Leon, Spain

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Evaluation of the performance of slaughterhouse surveillance for bovine tuberculosis detection in Castilla y Leon, Spain


Participantes:

Universidad ComplutenseServicio de Micobacterias (MYC). Centro de Vigilancia Sanitaria Veterinaria (VISAVET). Universidad Complutense (UCM).

MAEVA SERVET, S.L.MAEVA SERVET, S.L..

Universidade de Sao PauloDepartamento de Medicina Veterinária Preventiva e Saúde Animal. Faculdade de Medicina Veterinária e Zootecnia. Universidade de Sao Paulo (USP).

Universidad ComplutenseDepartamento de Sanidad Animal. Facultad de Veterinaria. Universidad Complutense (UCM).

Junta de Castilla y LeónConsejería de Agricultura y Ganadería. Junta de Castilla y León.

Ministerio de Agricultura, Pesca y AlimentaciónSubdirección General de Sanidad e Higiene Animal y Trazabilidad. Dirección General de la Producción Agraria. Ministerio de Agricultura, Pesca y Alimentación (MAPA).







Preventive Veterinary Medicine
FACTOR YEAR Q
2.304 2019

NLMID: 8217463

PMID: 33676325

ISSN: 0167-5877



TÍTULO: Evaluation of the performance of slaughterhouse surveillance for bovine tuberculosis detection in Castilla y Leon, Spain


REVISTA: Prev. Vet. Med.


NUMERACIÓN: 189:105307


AÑO: 2021


EDITORIAL: Elsevier Science Publishers


AUTORES: Pozo P., Cespedes-Cardenas N., Bezos J., Romero B., Grau A., Nacar J., Saez JL., Minguez O. and Alvarez J..


PARTICIPANTES VISAVET


First
Pilar Pozo Piñol
2nd
Nicolás Céspedes Cárdenas
3rd
Javier Bezos Garrido
4th
Beatriz Romero Martínez
Last
Julio Álvarez Sánchez

DOI: https://doi.org/10.1016/j.prevetmed.2021.105307


CITA ESTA PUBLICACIÓN:

Pozo P., Cespedes-Cardenas N., Bezos J., Romero B., Grau A., Nacar J., Saez JL., Minguez O. y Alvarez J. Evaluation of the performance of slaughterhouse surveillance for bovine tuberculosis detection in Castilla y Leon, Spain. Preventive Veterinary Medicine. 189:105307. 2021. (A). ISSN: 0167-5877. DOI: 10.1016/j.prevetmed.2021.105307


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