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Department of Clinical Microbiology and Infectious Diseases, Hospital General Universitario Gregorio Marañón', C/Doctor Esquerdo, 46, 28007 Madrid, Spain
Correspondence R. Alonso ralonso.hgugm{at}salud.madrid.org
Received July 2, 2004
Accepted September 27, 2004
The aim of this study was to evaluate the toxigenic status of circulating strains of Clostridium difficile in a large teaching hospital. Overall 220 isolates were studied of which 199 (90.5 %) produced both large clostridial toxins detected by conventional methods. Ten more strains (4.5 %) had toxin A and B genes detectable by PCR. Eleven (5.0 %) variant strains (AB+) were detected among the isolates studied and 10 strains (4.5 %) had the binary toxin genes (cdtA and cdtB).
Abbreviation: LCTs, large clostridial toxins.
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