Emerging Infectious Disease ISSN: 1080-6059

Nosocomial Infection with Vancomycin-dependent Enterococci¹

Paul A. Tambyah*

, John A. Marx*, and Dennis G. Maki*

Author affiliations: *University of Wisconsin Medical School, Madison, Wisconsin, USA

Figure 1

Etest (AB Biodisk, Solna) vancomycin susceptibility–testing strip on sheep-blood agar inoculated with vancomycin-dependent enterococci (VDE). VDE strain can only grow contiguous to the end of the strip with the highest concentrations of vancomycin. Isolated colonies are also growing far from the strip; they represent revertants to vancomycin independence.

Figure 1. Etest (AB Biodisk, Solna) vancomycin susceptibility–testing strip on sheep-blood agar inoculated with vancomycin-dependent enterococci (VDE). VDE strain can only grow contiguous to the end of the strip with the highest concentrations of vancomycin. Isolated colonies are also growing far from the strip; they represent revertants to vancomycin independence.

Main Article

¹Presented in part at the 38th Interscience Conference on Antimicrobial Agents and Chemotherapy, San Diego, CA, September 24–27, 1998.

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