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Increasing Resistance to Vancomycin and Other Glycopeptides in Staphylococcus aureus

Fred C. Tenover,* James W. Biddle,* and Michael V. Lancaster†
*Centers for Disease Control and Prevention, Atlanta, Georgia, USA; and †Bright Ideas, Monterey, California, USA

Figure 2. A blood agar plate in which three, 10-fold dilutions of a culture originally containing 108 CFU/mL of the Michigan VISA strain have been inoculated. Mixed colonial morphologies are present on the plate after 24 h of incubation at 35°C.

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Figure 2. A blood agar plate incubated for 24h at 35°C in which the multiple colonial morphologies of the Michigan VISA strain can be observed. The large cream colored colonies and smaller gray colonies demonstrated the same antibiogram (vancomycin MIC= 8 ug/ml) and pulsed field gel electrophoresis profiles.
 


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This page last reviewed December 08, 2001

Emerging Infectious Diseases Journal
National Center for Infectious Diseases
Centers for Disease Control and Prevention