PREVALENCE OF COAGULASE NEGATIVE STAPHYLOCOCCUS IN MASTITIS INFECTION IN DAIRY CATTLE IN AND AROUND BAHIR DAR
Dr. Gashaw Getaneh*
ABSTRACT
In Ethiopia, knowledge about the coagulase negative staphylococci (CNS) involved in mastitis is limited. Coagulase negative staphylococci have emerged to be pathogens causing intra-mammary infections in dairy herds. A cross sectional study was conducted in order to determine prevalence of CNS from October, 2014 to November, 2015 in and around Bahir Dar town. A total of 384 (129 local zebu and 255 Holstein x local zebu) lactating cows were screened. From the total lactating cows examined, 242 (63.02%) cows were found to be affected with mastitis infection which was detected by clinical examination and the California Mastitis Test (CMT), of which 14 (3.65%) and 228 (59.38%) were clinical and sub clinical mastitis, respectively. Positive milk samples were used for bacteriological examination and a total of 84 CNS were obtained. Among the potential risk factors considered, stage of lactation, parity, udder/ teat lesion, udder and teat washing before milking and after milking and breed were found to affect the occurrence of CNS mastitis significantly (p< 0.05). In this study, it is observed that CNS should be given a great concern as a threat for the dairy industries.
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