JCM Accepts, published online ahead of print on 17 October 2007

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J. Clin. Microbiol. doi:10.1128/JCM.01663-07
Copyright (c) 2007, American Society for Microbiology and/or the Listed Authors/Institutions. All Rights Reserved.

A Comparison of Three Commercial Test Systems for Biotyping Haemophilus influenzae and Haemophilus parainfluenzae

Erik L. Munson and Gary V. Doern^*

Division of Medical Microbiology, Department of Pathology, University of Iowa, Carver College of Medicine, Iowa City, Iowa 52242

^* To whom correspondence should be addressed. Email: gary-doern{at}uiowa.edu.

Biotypes of Haemophilus influenzae and Haemophilus parainfluenzae were determined with three commercially-available biochemical test kits: the IDS RapID NH system, the NHI card and the API NH strip. The API NH strip performed best, correctly classifying the biotypes of 371 of 380 different challenge strains (97.6%).

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