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Comparative Study
. 1987 Aug;20(2):155-64.
doi: 10.1093/jac/20.2.155.

A comparison of the responses of staphylococci and streptococci to teicoplanin and vancomycin

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Comparative Study

A comparison of the responses of staphylococci and streptococci to teicoplanin and vancomycin

D Greenwood et al. J Antimicrob Chemother. 1987 Aug.

Abstract

Continuous turbidimetric monitoring of cultures of staphylococci and streptococci exposed to teicoplanin or vancomycin revealed considerable inhibitory activity at concentrations below the conventionally-determined minimum inhibitory concentration. Teicoplanin was more active than vancomycin against low inocula, but exhibited a larger inoculum effect. A modest decline in susceptibility to teicoplanin and vancomycin could be induced by sequential exposure to the drugs. Such variants gradually reverted to susceptibility on passage in antibiotic-free broth. The morphological consequences of exposure to the two antibiotics were similar as judged by scanning electron microscopy.

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