가축 유래 staphylococcus aureus의 enterotoxin 산생과 plasmid profile에 관한 연구 IV. 분리균의 행균제 내성

Enterotoxin production and plasmid profiles of staphylococcus aureus isolated from domestic animals IV. Antibiotic-resistance of staphylococcus aureus

Antimicrobial susceptibilities of 312 strains of Staphylococcus aureus isolated from bulk milk, chickens, pjgs and cattle materials in Gyeongnam area during March to November 1991 were tested by the agar dilution method. MIC₉₀ of ampicillin(Ap), erythromycin(Em), gentamicin(Gm), Kanamycin(Km), penicillin G(Pc) and tetracycline(Tc) were higher than 100㎍/ml and all isolates were sensitive to cephalothin(Cet) and vancomycin(Vm) at 0.2 to 0.4㎍/ml and 0.4 to 1.56㎍/ml, respectively. All isolates from chickens, 54(98.2%) of 55 strains from pigs, 116(87.2%) of 133 strains from bulk milk and 8(25.8%) of 31 strains from cattle samples were resistant to at least one of the following ; Ap, Cm, Em, Km, Pc and Tc. Twenty-eight kinds of resistant patterns of the 271 resistant strains were detected. The most ferquent patterns of drug resistance were Cm Em Tc patterns(42 strains), Em Km Tc patterns(28 strains) and Em Tc patterns(26 strains).