Abstract
A cross-sectional study was conducted at Butajira Municipality abattoir from December, 2009 to April 2010 to investigate the epidemiology of bovine tuberculosis (bTB) in Butajira, Southern Ethiopia. Postmortem examination, mycobacterial culturing and multiplex genus typing techniques were used. An overall prevalence of 9% (40/446) of the animals examined harbor gross tuberculous lesions up on detailed post-mortem examination. Statistically significant difference was observed in the prevalence of bTB between different age groups (χ2 = 11.441, p= 0.003) and body condition scoring (χ2 = 10.384, p = 0.006). Higher prevalence of bTB was observed in older animals and animals with poor body condition. Bacteriological culture of the 40 samples gave growth on 13 with 9 of them acid fast Bacilli (AFB) positive. Genus typing of the AFB positive isolates by multiplex polymerase chain reaction (m-PCR) revealed seven non-tuberculous mycobacterium (NTM) and 1 Mycobacterium tuberculosis complex (MTBC) isolates. Further characterization of the isolates at specific species and investigation of the disease is recommended for controlling it in livestock and safeguard public health. Key words: Abattoir, bovine tuberculosis, Butajira, multiplex genus typing, epidemiology, Ethiopia, postmortem examination, prevalence.
Highlights
Bovine tuberculosis is a chronic infectious disease of animals characterized by the formation of granulomas in tissues and organs
Further characterization of the isolates at specific species and investigation of the disease is recommended for controlling it in livestock and safeguard public health
It is caused by slowly growing nonphotochromogenic bacilli members of the Mycobacterium tuberculosis complex (MTBC): M. tuberculosis, Mycobacterium africanum Mycobacterium microti, Mycobacterium bovis, Mycobacterium canetti and Mycobacterium caprae species (Radostits et al, 2000; Thoen et al, 2006)
Summary
Bovine tuberculosis (bTB) is a chronic infectious disease of animals characterized by the formation of granulomas in tissues and organs. It is caused by slowly growing nonphotochromogenic bacilli members of the Mycobacterium tuberculosis complex (MTBC): M. tuberculosis, Mycobacterium africanum Mycobacterium microti, Mycobacterium bovis, Mycobacterium canetti and Mycobacterium caprae species (Radostits et al, 2000; Thoen et al, 2006). ; in developing countries, still constitutes a major threat to public health where surveillance and control activities are often inadequate or unavailable (Ayele et al, 2004). Accurate and sound scientific baseline prevalence data of bTB across a range of ecoepidemiological settings is needed to ensure public health policies and disease control strategies. The study was carried out in Butajira Manucipital abattoir, Meskan district of the Southern Ethiopia to determine the epidemiology of bTB in slaughtered cattle
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