Evaluation of Antimicrobial Resistance in
Staphylococcus Spp.
Isolated from Subclinical Mastitis in Cows
Seyda Cengiz1*, Gökcen Dinc2
and Mehmet Cengiz3
1Department
of Microbiology, Faculty of Veterinary Medicine, Atatürk University,
Erzurum-Turkey; 2Department of Medical Microbiology,Faculty of Medicine, Erciyes University, Kayseri-Turkey;
3Department of Obstetrics and Gynecology, Faculty of
Veterinary Medicine, Atatürk University, Erzurum-Turkey *Corresponding author:seliberia@hotmail.com
Abstract
The objective of this study was to determine the
antibiotic resistance in different
Staphylococcus isolates using conventional and molecular methods. A total of
61 subclinical mastitis isolates of
Staphylococci were evaluated for oxacillin, erythromycin, tetracycline,
nitrocefin, and cefoxitin using the Kirby-Bauer disc diffusion method. The same
isolates were also subjected to the multiplex PCR technique to detect
mecA, femA and
ermA,
ermC, tetK, and
tetM genes. Of the isolates, (Staphylococcus
aureus, n=34 and coagulase negative
Staphylococcus (CoNS), n=27) 26, 29, and 8 were resistant to erythromycin,
tetracycline, and oxacillin, respectively in phenotypical evaluation. The
genotypical evaluation indicated that of the strains, 34 carried
erm genes in erythromycin-resistant
strains and 10 carried tet genes in tetracycline-resistant strains. Agreement rates between
genotypic and phenotypic evaluation for erythromycin, tetracycline and
methicillin were 57, 65.5 and 89% respectively. Data suggest that phenotypical
methods should be accompanied by genotypical methods to establish antibacterial
resistance accurately, which would enhance treatment efficiency.