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Journal of Clinical Microbiology, September 2005, p. 4402-4406, Vol. 43, No. 9
0095-1137/05/$08.00+0 doi:10.1128/JCM.43.9.4402-4406.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.
Performances of VITEK 2 Colorimetric Cards for Identification of Gram-Positive and Gram-Negative Bacteria
Frédéric Wallet,
Caroline Loïez,
Emilie Renaux,
Nadine Lemaitre, and
René J. Courcol*
Laboratoire de Bactériologie-Hygiène, Centre Hospitalier Universitaire, Lille, France
Received 15 April 2005/
Returned for modification 16 June 2005/
Accepted 22 June 2005
The purpose of this study was to evaluate the new VITEK 2 identification
cards that use colorimetric reading to identify gram-positive and
gram-negative bacteria (GP and GN cards, respectively) in comparison to
fluorimetric cards (ID-GPC and ID-GNB, respectively). A total of 580
clinical isolates and stock collection strains belonging to 116 taxa
were included in the study. Of the 249 gram-positive strains tested
with both the ID-GPC and GP cards, 218 (87.5%) and 235 (94.4%) strains
were correctly identified (to the genus and species level),
respectively. Of the 331 gram-negative strains tested with the ID-GNB
and GN cards, 295 (89.1%) and 321 (97%) strains were correctly
identified, respectively. Another focus of the study was to apply the
percentages of correct identifications obtained in this study to the
list of bacteria isolated in our laboratory (32,739 isolates) in the
year 2004. We obtained 97.9% correct identifications with the
colorimetric cards and 93.9% with fluorescent
cards.
* Corresponding author. Mailing address: Laboratoire de Bactériologie-Hygiène, Hôpital A. Calmette, F-59037 Lille Cedex, France. Phone: 33 320 444 908. Fax: 33 320 444 895. E-mail: rcourcol{at}chru-lille.fr.
Journal of Clinical Microbiology, September 2005, p. 4402-4406, Vol. 43, No. 9
0095-1137/05/$08.00+0 doi:10.1128/JCM.43.9.4402-4406.2005
Copyright © 2005, American Society for Microbiology. All Rights Reserved.
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Copyright © 2005 by the American Society for Microbiology. All rights reserved.