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Original Research

Vet World. 2010; 3(5): 205-208

Characteristics of Staphylococci isolated from mastitic goat milk in Iranian dairy herds

Azizollah Ebrahimi, Naser Shams, Somayeh Shahrokh and Pezhman Mirshokraei.

Cited by (1)

One hundred and fifteen cases of sub clinical mastitis were detected in a study on 510 goats from 5 herds in west central, Iran. From positive milk samples, 23 Staphylococcus spp. strains were isolated. Fourteen isolates were determined as Staphylococcus aureus (12.17%), and the other 9 (7.82%) as Staphylococcus epidermidis. Eleven and six isolates of S. aureus and S. epidermidis produced combined form of hemolysins a//d, while /d hemolysins produced by 2 and 3 isolates respectively . Only one isolate of S. aureus produced single type d hemolysin. The sensitivity of all strains to 10 chemotherapeutics was tested through the disk diffusion method, 6 strains (26.08%) were determined as methicillin-resistant: out of them 4 isolates were S. aureus and 2 S.epidermidis. S. aureus and S. epidermidis isolates were 100% resistant to Cloxaciline and Kanamycin while the resistance to Penicillin was 100% in S. aureus and 33.33% in S. epidermidis isolates.

Key words: Goat, Mastitis, Staphylococci, Hemolysin, Antimicrobial susceptibilities, Iran.

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