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Pakistan Journal of Biological Sciences
  Year: 2008 | Volume: 11 | Issue: 1 | Page No.: 148-150
DOI: 10.3923/pjbs.2008.148.150
 
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Isolation of Streptococci from Milk Samples of Normal, Acute and Subclinical Mastitis Cows and Determination of Their Antibiotic Susceptibility Patterns

Azizollah Ebrahimi, Farzaneh Nikookhah, Saeed Nikpour, Farya Majiian and Masoud Gholami

Abstract:

Streptococci are frequently isolated from bovine mastitis in dairy cows with only limited information available on the antimicrobial susceptibility of these organisms. A total of 42 Streptococci isolated from 148 milk samples of normal, sub acute and acute bovine mastitis cases. Overall, 35% of the strains tested were Streptococcus dysgalactiae, Streptococcus agalactiae 26%, Streptococcus uberis 18 and 4% were Enterococcus sp. Differences between the number of isolations in acute and sub acute groups were statistically significant, (p<0.5). The antimicrobial susceptibility for these organisms was determined for the following antimicrobial agents: cephalexine, penicillin, clindamycin, cloxaciline, gentamicin, streptomycin, amoxicillin, tetracycline, kanamycin, oxytetracycline, ampicillin, chloramphenicol and erythromycin. S. agalactiae, S. dysgalactiae, S. uberis and Enterococci demonstrated high level of resistance against streptomycin, penicillin and cloxaciline. Low level of sensitivity to other tested antimicrobials was demonstrated.

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How to cite this article:

Azizollah Ebrahimi, Farzaneh Nikookhah, Saeed Nikpour, Farya Majiian and Masoud Gholami, 2008. Isolation of Streptococci from Milk Samples of Normal, Acute and Subclinical Mastitis Cows and Determination of Their Antibiotic Susceptibility Patterns. Pakistan Journal of Biological Sciences, 11: 148-150.

DOI: 10.3923/pjbs.2008.148.150

URL: https://scialert.net/abstract/?doi=pjbs.2008.148.150

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