Mycobacterial Species Isolated from Cattle
To the best of our knowledge, mycobacteria were isolated from cattle in only two of the reported studies (Bonsu et al. 2000; Asante-Poku et al. 2014). Our group cultured 17 samples from suspected lesions and only 6 (35.3%) yielded AFBs.
Three of the isolates were identified as MTC, which yielded two M. tuberculosis strains and one M. africanum strain. The remaining three isolates belonged to Mycobacterium other- than-tuberculosis (MOTT). Spoligotyping further characterized the two M. tuberculosis isolates as Ghana (spoligotype Data Base 4 number 53) and Latin American Mediterranean (LAM), while spoligotyping and single nucleotide polymorphism (SNP) analysis typed the M. africanum as West African 1. Microseq 500 analysis identified two of the MOTT isolates as M. flavescens and M. moriokaense, while the remaining one could not be identified (Asante-Poku et al. 2014). Furthermore, Atiadeve et al. (2014) examined 93 AFB isolates: Of these 11 (11.8%) were members of the MTC and 82 (88.2%) were non-tuberculous mycobacteria. All three main MTC strains, that is, M. bovis, M. tuberculosis, and M. africanum, were identified. These findings from Ghana and elsewhere probably indicate that other mycobacterial species are also important as a cause of BTB (Skuce et al. 2011; Asante-Poku et al. 2014).15.5
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