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Drug Resistance as Influenced by Inactivated Sensitivity Discs
Author(s) -
Lewis J. Griffith,
C. G. Mullins
Publication year - 1968
Publication title -
applied microbiology
Language(s) - English
Resource type - Journals
ISSN - 0003-6919
DOI - 10.1128/am.16.4.656-658.1968
Subject(s) - cloxacillin , penicillin , humidity , antibiotics , microbiology and biotechnology , penicillin resistance , chemistry , biology , thermodynamics , physics
Reports of staphylococci resistant to the semisynthetic penicillins stimulated a study of the factors influencing the stability of the drugs in discs. The behavior of penicillin G, methicillin, oxacillin, cloxacillin, and cephalothin discs under different humidity and temperature conditions is described. Humidity was found to be the most significant factor in drug inactivation. Storage of discs in a vacuum desiccator at -20 C provides maximal antibiotic stability.

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