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First-time detection of mycobacterium species from goats in Ethiopia

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Abstract

Tuberculosis (TB) is an important zoonosis affecting a wide range of hosts. An abattoir study was conducted on 1,536 randomly selected male goats slaughtered at Modjo Modern Export Abattoir to determine the prevalence of tuberculosis in slaughtered goats. Carcasses and organs of all the study animals were first examined by routine meat inspection followed by detailed meat inspection. Samples from tuberculous lesions were cultured for mycobacterial isolation and identification. Histopathology was done on 31 samples with tuberculous lesions. Detailed meat inspection detected 65 (4.2%; 95% confidence interval (CI) = 3.3–5.4%) tuberculous lesions. From these, 20 (30.8%) samples were confirmed mycobacterium positive on culture, out of which 18 were Mycobacterium bovis and two were Mycobacterium tuberculosis. Routine meat inspection failed to detect tuberculous lesions in 23% of carcasses with TB lesions detected by detailed examination. However, no statistically significant difference was observed between both methods in detecting tuberculous lesions (Kappa = 0.87). Origin and age of the goats did not statistically affect the disease prevalence (P > 0.05). Histopathologic lesions were observed in 21 samples (68%; 95% CI = 50.1–81.4%) out of the 31 carcasses with gross tuberculous lesions examined by histopathology. Eighteen (58%) tuberculous samples positive for histopathology were also culture positive. The sensitivity and specificity of histopathology were 90% (95% CI = 76.9–100%) and 72.7% (95% CI = 46.4–99%), respectively, using culture as a reference test. To the best of our knowledge, this is the first report of caprine tuberculosis from Ethiopia. Further studies are required at the farm level to determine the prevalence of tuberculosis in the general goat population.

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Acknowledgments

The authors would like to thank personnel at the Modjo Modern Export Abattoir for their unreserved support. We are very grateful to Ms. Surane Gemeda at ALIPB, AAU for her technical assistance in the laboratory. Our many thanks go to Dr. Gobena Ameni, ALIPB, AAU, for his support, encouragement and useful comments during this study. Our sincere thanks are to Dr. Abdisa Zerai, University of New Mexico, for editing the paper.

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Authors and Affiliations

  1. Faculty of Veterinary Medicine, Department of Epidemiology, Microbiology and Veterinary Public Health, Haramaya University, Haramaya, Ethiopia

    Adem Hiko

  2. Faculty of Veterinary Medicine, Department of Microbiology and Veterinary Public Health, Addis Ababa University, P.O. Box 34, Bishoftu, Ethiopia

    Getahun Ejeta Agga

  3. Lovelace Respiratory Research Institute, 2425 Ridgecrest Drive SE, Albuquerque, NM, 87108, USA

    Getahun Ejeta Agga

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  1. Adem Hiko
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Correspondence to Getahun Ejeta Agga.

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Hiko, A., Agga, G.E. First-time detection of mycobacterium species from goats in Ethiopia. Trop Anim Health Prod 43, 133–139 (2011). https://doi.org/10.1007/s11250-010-9665-4

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