Limitations of vitek GPS-418 cards in exact detection of vancomycin-resistant enterococci with the vanB genotype.
The susceptibilities of 20 strains of vancomycin-resistant enterococci (VRE) with the vanB genotype obtained by using Vitek GPS-418 cards were compared with those obtained by the broth dilution method of the National Committee for Clinical Laboratory Standards (NCCLS) (approved standard M7-A4) and with those obtained by the agar screen method using bile esculin azide agar containing 6 microgram of vancomycin per ml. Although both the broth dilution and agar screen methods disclosed no discordance, Vitek GPS-418 cards yielded a very major error compared with the results obtained by the reference broth dilution method of the NCCLS. Vitek GPS-418 cards were therefore found to have considerable room for improvement for the accurate detection of vanB VRE strains.
Okabe
T
T
Central Clinical Laboratories, Shinshu University Hospital, Matsumoto, Nagano, 390-8621, Japan.
Oana
K
K
Kawakami
Y
Y
Yamaguchi
M
M
Takahashi
Y
Y
Okimura
Y
Y
Honda
T
T
Katsuyama
T
T
D001426:Bacterial Proteins / Q000235:genetics*; D013293:Enterococcus faecalis / Q000187:drug effects* / Q000235:genetics; D016908:Gram-Positive Bacterial Infections / Q000382:microbiology; D006801:Humans; D008826:Microbial Sensitivity Tests / Q000295:instrumentation*; D015203:Reproducibility of Results; D020713:Vancomycin Resistance / Q000235:genetics*
D001426:Bacterial Proteins; C079913:VanB protein, Enterococcus