Isolation And Antimicrobial Susceptibility Of Staphylococcus Aureus And Occurrence Of Methicillin Resistant Staphylococcus Aureus (mrsa) In Mastitic Dairy Cows In The Selalefitche Area North Showa Ethiopia

Bovine mastitis is of the most significant problems associated with high milk production lossrnin Ethiopia. Staphylococcus aureus is still a major cause of bovine mastitis. MRSA is anyrnstrain of Staphylococcus aureus that has developed resistance to beta-lactam antibiotics. Itrnhas been known by a significant public health problem infected animals with MRSA mightrnserve as a potential source of human infection. This study was carried out with the aim that torndetermine the prevalence of Staphylococcus aurous mastitis from the total of clinical and subclinicalrnmastitis and identify associated risk factors, isolates and identify Staphylococcusrnaurous and MRSA strains from mastitic milk samples and conduct in vitro antimicrobialrnsusceptibility test on the isolates. Quarter milk samples from cows were examined torndetermine the prevalence of Staphylococcus aureus, MRSA and different antibiotic resistantrnpattern were determined in a cross-sectional study design. A total of 403 samples wererncollected and screened for the presence of S. aureus. The overall prevalence of mastitis at cowrnand quarter levels were 128 (83.1%) and 403 (65.42%) respectively. A total of 164 (40.69%)rnS. aureus isolates were obtained and out of these isolates 60 (36.6%) were found MRSArnisolates during this study. The risk factors of mastitis like age group and pregnancy status hadrnno effect on (p>0.05) Staphylococcus aureus isolation whereas, stage of lactation andrnprevious mastitis history had significant effect on (p

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