Abstract
A disk approximation test, in which the inhibitory zone of one beta-lactam antibiotic is truncated under influence of another beta-lactam (e.g. cefoxitin), was used as a screen for the presence of inducible betalactamase. By using beta-lactamase extracts and a specific inhibitor, it was shown that chromosomal beta-lactamase can indeed be the sole cause of truncated beta-lactam inhibitory zones.
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Tausk, F., Stratton, C.W. Beta-lactamase alteration of betalactam inhibitory zones. Eur. J, Clin. Microbiol. 6, 474–476 (1987). https://doi.org/10.1007/BF02013113
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DOI: https://doi.org/10.1007/BF02013113