Clonality of clinical methicillin-resistant Staphylococcus epidermidis isolates in a neonatal intensive care unit

Pathologie-biologie
N Ben SaidaJ Boukadida

Abstract

Study of the clonality of methicillin-resistant Staphylococcus epidermidis responsible of epidemic infections in a neonatal intensive care unit. All S. epidermidis isolates (mecA+) were collected during the epidemic period (December 2003-September 2004) from different pathological products of newborns. Isolates were characterized by genotyping in pulsed-field gel electrophoresis and by electrophoretic profiles obtained by PCR-based analysis of inter-IS256 spacer polymorphisms. Twenty methicillin-resistant S. epidermidis isolates were collected from newborns during the epidemic period and represented 41.6% of the total isolates of S. epidermidis, which is the first Staphylococcus species isolated from the unit. These isolates were collected from blood cultures (80%), vascular catheters (5%), pus (10%), and intra-tracheal tube (5%). Six genotypic profiles were individualized: type A, type B, type C, type D, type E, and type F, with clear dominance of type A. Five different PCR patterns were found with poor correlation to genotypes defined by PFGE. Neonatal nosocomial outbreak of methicillin-resistant S. epidermidis was caused by multiple clones of this species with predominance of one epidemic and multiresistant clone. This clone...Continue Reading

References

Jan 1, 1991·The Pediatric Infectious Disease Journal·S L Hall
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Oct 8, 1999·The Journal of Antimicrobial Chemotherapy·M De GiustiC Chiesa
May 16, 2002·The Journal of Hospital Infection·O RaimundoS M Garland

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