alexa A survey of zoonotic diseases in trade cattle slaughtered at Tanga city abattoir: a cause of public health concern.
Microbiology

Microbiology

Journal of Microbial & Biochemical Technology

Author(s): Swai ES, Schoonman L

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Abstract OBJECTIVE: To estimate the prevalence of hydatidosis, cysticercosis, tuberculosis, leptospirosis, brucellosis and toxoplasmosis in slaughtered bovine stock (aged ±3 years) at Tanga city abattoir, Tanzania. METHODS: Prevalence estimation of the five zoonotic diseases was undertaken through an active abattoir and sero-survey was carried out in Tanga city, during the period of January 2002 and March 2004. Serum samples collected from a sub-sample (n=51) of the slaughter stock were serologically screened for antibodies against brucellosis, leptospirosis and toxoplasmosis using Rose Bengal plate test, microscopic agglutination test (for 5 serovars of Leptospira interrogans) and Eiken latex agglutination test, respectively. The same animals were tested for tuberculosis using the single intradermal tuberculin test. RESULTS: Post mortem examination of 12 444 slaughter cattle (10 790 short horn zebu and 1 654 graded) over a period of twenty two months, showed a prevalence of 1.56\% (194) for hydatidosis, 1.49\% (185) for cysticercosis and 0.32\% (40) for tuberculosis. In all three zoonoses, a statistically significant difference in infection rates was noted between the short horn zebu and graded breeds (P<0.05). The overall seroprevalences of animals with brucellosis, toxoplasmosis and leptospirosis antibodies were found to be 12\%, 12\% and 51\%, respectively. The most common leptospiral antibodies detected were those against antigens of serovars Leptospira hardjo (29\%), Leptospira tarassovi (18\%), Leptospira bataviae (4\%) and Leptospira pomona (0\%). With regard to tuberculosis, 10\% (n=5) of the animals tested were classified as non-specific reactors or inconclusive. CONCLUSIONS: The study findings suggest that brucellosis, toxoplasmosis and leptospirosis are prevalent in Tanga and provide definitive evidence of slaughtered stock exposure to these zoonotic agents with concurrent public health consequences.
This article was published in Asian Pac J Trop Biomed and referenced in Journal of Microbial & Biochemical Technology

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