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. 1976 Jan;9(1):196-8.
doi: 10.1128/AAC.9.1.196.

Susceptibility of Haemophilus influenza to ampicillin as determined by use of a modified, one-minute beta-lactamase test

J Escamilla

Susceptibility of Haemophilus influenza to ampicillin as determined by use of a modified, one-minute beta-lactamase test

J Escamilla. Antimicrob Agents Chemother. 1976 Jan.

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.

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References

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