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OJVR
Online Journal of Veterinary
Research©
Volume 15 (2):124-130,
2011. Extensively redacted 2017.
Antibiotic
resistance of Staphylococcus and Streptococcus Spp
determined by milk somatic cell count in healthy cows.
Mohammad Amin Hanifpour1;
Abdolah Mirzaei2; Mohammad Reza Hatami1;
Razmik Beglarian3; Mehdi Roushan Zamir1; Mohammad Hadi
Eskandari4
1Fars Pegah
Pasteurized Milk Company, Iran; 2Department of Clinical Science, School of Veterinary Medicine,
Shiraz University, Shiraz, Iran; 3Chief department of stockbreeding's production Technology, Dean
of Technology faculty, Armenian Agricultural Academy, Yerevan, Armenia; 4Department of Food Science
and Technology, College of Agriculture, Shiraz University, Shiraz, Iran
ABSTRACT
Hanifpour MA, Mirzaei
A, Hatami MR, Beglarian R, Zamir R, Eskandari MH., Antibiotic resistance of Staphylococcus and
Streptococcus Spp as determined by milk somatic cell
count in healthy cows, Onl J Vet Res., 15 (2):
124-130, 2011. In vitro antibiotic resistance of
bacteria isolated from 100 clinically normal lactating cows was determined by
somatic cell count. Milk samples were taken aseptically from all quarters.
Twelve genus of bacteria were isolated from 133
(33.25%) quarters and 48 (48%) cows. Most frequent isolates were Staphylococcus Spp., 37.61% and Streptococcus spp., 36.69%, both highly
resistant to penicillin 39% and cloxacillin 22.5%,
respectively. Minimum inhibitory concentrations of the various antibiotics used
to treat mastitis for Staphylococcus Spp was < 8 and < 2 μg/ml based on the percentage of bacterial resistance.
Keywords: Antibiotic resistance, Somatic cell count, Dairy cows.
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