Journal of Antimicrobial Chemotherapy (2002) 49, 841-843
© 2002 The British Society for Antimicrobial Chemotherapy
Molecular analysis of vancomycin-resistant Enterococcus faecalis from Michigan hospitals during a 10 year period
1Departments of Internal Medicine; 2Division of Infectious Disease, 3Veterans Affairs Healthcare Center, Ann Arbor, MI; 4University of Michigan Medical School, Ann Arbor, MI; 5William Beaumont Hospital, Royal Oak, MI; 6Wayne State University, Detroit, MI; 7Michigan Department of Community Health, Lansing, MI, USA
Received 28 August 2001; returned 25 November 2001; revised 30 January 2002; accepted 5 February 2002.
We evaluated the molecular relatedness of 47 clinical isolates of vancomycin-resistant Enterococcus faecalis collected from 15 Michigan hospitals from 1991 to 2000. There were 17 PFGE strain types for the 47 isolates. Ten of 15 hospitals demonstrated interhospital, and three of 15 intrahospital, dissemination of some isolates. Forty-two isolates (89.4%) demonstrated vanB resistance. All vanA isolates comprised unique PFGE groups, suggesting transposon dissemination or the presence of a similar plasmid. The results of this study suggest inter- and intrahospital dissemination of strains of vancomycin-resistant E. faecalis during a 10 year period in Michigan.
* Correspondence address. William Beaumont Hospital, 3601 West 13 Mile Road, Royal Oak, MI 48073, USA. Tel: +1-248-551-0419; Fax: +1-248-551-5069; E-mail: mzervos{at}Beaumont.edu
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