Risk factors associated with the presence of Mycobacterium bovis in macroscopic lesions suspected as being caused by bovine tuberculosis detected in slaughterhouses

Autores/as

DOI:

https://doi.org/10.5433/1679-0359.2022v43n2p713

Palabras clave:

Complex Mycobacterium tuberculosis, Nested q-PCR, Post mortem inspection, Beef.

Resumen

Mycobacterium bovis is a bacterium belonging to the Mycobacterium tuberculosis complex that causes tuberculosis in cattle and in other domestic and wild animals, as well as in humans. Disease control measures are carried out by slaughtering animals tested positive in the intradermal tuberculinization test and sanitation of their original living spaces, in addition to epidemiological surveillance carried out through the sanitary inspection of bovine carcasses in slaughterhouses. In the latter, official inspection services collect samples from macroscopic lesions suspected of bovine tuberculosis, which are then sent for laboratory analysis. Knowledge concerning the variables associated with the occurrence of M. bovis can aid in decision-making regarding control and disease eradication efforts. In this context, the aim of this study was to identify the risk factors for a positive M. bovis diagnosis in suspected bovine tuberculosis lesions obtained during epidemiological surveillance activities in the state of Mato Grosso, Brazil. A total of 105 suspicious lesions were analyzed using the Nested Polymerase Chain Reaction (nested q-PCR) method, of which 14 (13.33%) tested positive for M. bovis. Univariate and bivariate statistical analyses indicated that the variable “animal slaughter” was the only risk factor presenting statistical significance associated with the diagnosis of M. bovis (p < 0.05), demonstrating that macroscopic lesions suspected as being caused by bovine tuberculosis from animals with an in vivo diagnosis were 2.82 - fold more likely to result in a positive M. bovis diagnosis by molecular tests.

Biografía del autor/a

Flávio Gomes Barcelos, Universidade Federal de Mato Grosso

Student, Postgraduate Program of Animal Science, Faculty of Agronomy and Zootechnics, Universidade Federal de Mato Grosso, UFMT, Cuiabá, MT, Brazil.

Taís Ramalho dos Anjos, Universidade de Cuiabá

Student, Postgraduate Program in Animal Bioscience, Faculty of Veterinary Medicine, Universidade de Cuiabá, UNIC, Cuiabá, MT, Brazil.

Leila Auxiliadora de Arruda Alencar, Universidade Federal de Mato Grosso

Researcher, Faculty of Nutrition, Food Science and Technology Graduation, UFMT, Cuiabá, MT, Brazil.

Vinicius Silva Castro, Universidade Federal de Mato Grosso

Researcher, Postgraduate Program of Animal Science, Faculty of Agronomy and Zootechnics, UFMT, Cuiabá, MT, Brazil.

Adelino Cunha-Neto, Universidade Federal de Mato Grosso

Researcher, Faculty of Nutrition, UFMT, Cuiabá, MT, Brazil.

Fernanda Tavares Carvalho, Universidade Federal de Mato Grosso

Student, Postgraduate Program in Nutrition, Food and Metabolism, Faculty of Nutrition, UFMT, Cuiabá, MT, Brazil, and UNIC, Postgraduate Program in Animal Bioscience, Faculty of Veterinary Medicine, Cuiabá, MT, Brazil.

Mariano Martinez Espinosa, Universidade Federal de Mato Grosso

Prof., Institute of Exact and Earth Sciences, Department of Statistics, UFMT, Cuiabá, MT, Brazil.

Ricardo Cesar Tavares Carvalho, Universidade Federal de Mato Grosso

Prof., Postgraduate Program in Nutrition and Metabolism, Faculty of Nutrition, UFMT, Cuiabá, MT, Brazil, and UNIC, Postgraduate Program in Animal Bioscience, Faculty of Veterinary Medicine, Cuiabá, MT, Brazil.

Eduardo Eustáquio de Souza Figueiredo, Universidade Federal de Mato Grosso

Prof., Postgraduate Program of Animal Science, Faculty of Agronomy and Zootechnics, UFMT, and Postgraduate Program in Nutrition, Food and Metabolism, Faculty of Nutrition, Cuiabá, MT, Brazil.

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Publicado

2022-02-25

Cómo citar

Barcelos, F. G., Anjos, T. R. dos, Alencar, L. A. de A., Castro, V. S., Cunha-Neto, A., Carvalho, F. T., … Figueiredo, E. E. de S. (2022). Risk factors associated with the presence of Mycobacterium bovis in macroscopic lesions suspected as being caused by bovine tuberculosis detected in slaughterhouses. Semina: Ciências Agrárias, 43(2), 713–726. https://doi.org/10.5433/1679-0359.2022v43n2p713

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