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  • Title: [Sensitivity of beta-hemolytic streptococci to antibiotics].
    Author: Liashenko IuI, Khodyrev AP.
    Journal: Antibiotiki; 1978 Jun; 23(6):549-52. PubMed ID: 354509.
    Abstract:
    Susceptibility of 64 beta-hemolytic streptococcal strains isolated from the patients with sore throat was studied by the method of serial dilutions in fluid nutrient medium (Konikov broth). Heterogenecity with respect to the sensitivity was investigated in 34 strains among separate populations of the microbes (10 to 15 in every strain). The MIC of benzylpenicillin, oxacillin and erythromycin ranged within 0.007--0.24 U/ml, 0.02--0.36 gamma/ml and 0.005--0.1 gamma/ml respectively. The MIC of benzylpenicillin with respect to separate populations most sensitive to it was 0.007--0.015 U/ml, while that with respect to the lease sensitive populations ranged from 0.015 to 0.24 U/ml. The respective values for oxacillin were 0.02--0.12 and 0.18--0.36 gamma/ml and those for erythromycin were 0.005--0.025 and 0.05--0.1 gamma/ml. Therefore, the beta-hemolytic streptococci isolated from the patients with sore throat were characterized by a rather high sensitivity to the antibiotics which was important precondition for their efficiency in treatment of the patients with the above disease.
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