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. 1975 Jul;8(1):91–94. doi: 10.1128/aac.8.1.91

Rapid Detection of Ampicillin-Resistant Haemophilus influenzae and Their Susceptibility to Sixteen Antibiotics

Robert B Kammer 1, David A Preston 1, Jan R Turner 1, Lois C Hawley 1
PMCID: PMC429266  PMID: 1080656

Abstract

Ampicillin-resistant and -susceptible strains of Haemophilus influenzae were tested for susceptibility to 16 antibiotics. Chloramphenicol and a new cephalosporin, cefamandole, were most active with minimal inhibitory concentrations (MICs) for all bacteria tested between 0.5 to 2.0 μg/ml. All but two organisms were susceptible to tetracycline. Ampicillin-resistant strains of H. influenzae were less susceptible (MIC, 4 to 32 μg/ml) to carbenicillin and ticarcillin than ampicillin-susceptible organisms (MIC, 0.25 to 1.0 μg/ml). A rapid assay for β-lactamase, utilizing a chromogenic cephalosporin substrate, detected enzyme production in all 17 ampicillin-resistant strains of H. influenzae.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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