Susceptibility of Haemophilus influenzae to Ampicillin as Determined by Use of a Modified, One-Minute Beta-Lactamase Test
Open Access
- 1 January 1976
- journal article
- Published by American Society for Microbiology in Antimicrobial Agents and Chemotherapy
- Vol. 9 (1) , 196-198
- https://doi.org/10.1128/aac.9.1.196
Abstract
Fifty-seven cultures of Haemophilus influenzae were tested for production of beta-lactamase by use of a modified, 1-min test. Only the 24 cultures that were ampicillin resistant, whether type b or not, yielded positive results for the enzyme; all ampicillin-susceptible isolates were uniformly negative. The beta-lactamase procedure is simple to perform and requires only commonly available reagents.Keywords
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