Prevalence and antibiotic susceptibility of Staphylococcus aureus from bovine mastitis

Unakal, C.G. and Kaliwal, B.B. (2010) Prevalence and antibiotic susceptibility of Staphylococcus aureus from bovine mastitis. Veterinary World, 3 (2). pp. 65-67. ISSN 0972-8988

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Abstract

The primary objective of this study was to determine the prevalence and antimicrobial susceptibility of mastitic Staphylococcus aureus in dairy cows. Milk samples for microbiological culture were collected from dairy herds. A total of 105 samples were screened and 68 confirmed Staphylococcus aureus were obtained. The a, ß and non haemolytic activity revealed 20.58%, 75% and 4.41% respectively in 68 isolated strains of Staphylococcus aureus. Resistance of Staphylococcus aureus against 10 antimicrobial agents was tested using the disc diffusion method. The highest 86.76% isolates were resistant to penicillin followed by ampicillin 70.50%, amoxicillin 63.23%, gentamycin 47.05%, amikacin 30.80%, erythromycin 27.94%, Ciprofloxacin 26.47%, methicillin 23.52%, cefotaxime 20.58% and the lowest resistant was shown in ceftriaxone 19.11%. The study revealed that the increase in prevalence and antibiotic resistance pattern of the Staphylococcus aureus isolated from bovine mastitis.

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