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Diagnostic efficacy of abattoir meat inspection for detecting bovine tuberculosis at Adama municipal abattoir, Ethiopia

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Abstract

Bovine tuberculosis (BTB) is endemic in Ethiopia and like other developing countries in Africa. Ethiopia has limited laboratory and other diagnostic facilities. Therefore, abattoir inspection still remains the only option for monitoring BTB prevalence in domestic animals. However, information regarding the efficacy of such routine abattoir (RA) inspection is limited. The present study was conducted on 500 slaughtered cattle heads, slaughtered at the Adama municipal abattoir, Ethiopia from December 2009 to April 2010 to elucidate the efficacy of RA inspection with respect to the detailed abattoir (DA) inspection, bacteriological isolation, and PCR. Diagnostic accuracy of the RA inspection was determined by calculating sensitivity and specificity. The agreement between both the inspection protocols was determined by using kappa statistics. Results showed that there was a moderate agreement between the two inspection protocols (kappa = 0.43) conducted at Adama municipal abattoir, Ethiopia. The sensitivity and specificity of RA were 57.14 [CI 28.92–82.24] and 71.79 % [CI 55.12–84.98] when isolation was considered as reference test and 33.33 [CI 5.33–77.32] and 75.00 % [CI 35.05–96.07] when PCR was considered as reference test. However, DA inspection showed higher sensitivity, when isolation {82.35 % (14/17) [95 % CI 56.55–95.99]} and PCR {75 % (6/8) [95 % CI 35.05–96.07]} were considered as reference tests. The RA inspection failed to detect 69.81 %TB-infected carcasses which increased the chances of BTB-infected carcasses being released into the food chain. Based on our study, it is recommended that integrated preventive approaches involving enhanced surveillance of the disease through establishment of standardized abattoirs well-equipped with laboratory facilities. Also, adequate training to meat inspectors is essential to prevent the spread of the disease.

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Acknowledgments

The authors wish to acknowledge AHRI for the financial and material support. The authors are also thankful for all AHRI TB laboratory workers and all the staff members for their mutual assistance.

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Authors and Affiliations

  1. School of Veterinary Medicine, Wollo University, P.O. Box 1145, Dessie, Amhara Region, Ethiopia

    Bethelehem Alemu, Shahid Nazir & Tarekegn Tintagu

  2. College of Veterinary Medicine, Mekelle University, Mekelle, Ethiopia

    Awot Teklu

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  1. Bethelehem Alemu
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  2. Shahid Nazir
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Correspondence to Shahid Nazir.

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All applicable international, national, and/or institutional guidelines for the care and use of animals were followed.

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Alemu, B., Nazir, S., Tintagu, T. et al. Diagnostic efficacy of abattoir meat inspection for detecting bovine tuberculosis at Adama municipal abattoir, Ethiopia. Comp Clin Pathol 25, 885–893 (2016). https://doi.org/10.1007/s00580-016-2278-1

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