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Article

Evaluation of disk diffusion methods to detect low-level β-lactamase-negative ampicillin-resistant Haemophilus influenzae.

APMIS : acta pathologica, microbiologica, et immunologica Scandinavica - 1 Jun 2011

Nørskov-Lauritsen Niels, Ridderberg Winnie, Erikstrup Lise T, Fuursted Kurt

Abstract excerpt

We evaluated the efficacy of disk diffusion methods for detection of low-level β-lactamase-negative ampicillin-resistant (low-BLNAR) Haemophilus influenzae. Four hundred and seventy unselected, recent clinical isolates were tested with ampicillin (10 μg), cefaclor (30 μg) and cefuroxime (30 μg) on iso-Sensitest agar enriched with nicotinamide adenine dinucleotide (NAD) and horse blood [ST agar; Swedish Reference...

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PMID: 21569097
DOI: 10.1111/j.1600-0463.2011.02745.x

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