title: Methicillin-resistant and borderline methicillin-resistant asymptomatic Staphylococcus aureus colonization in children without identifiable risk factors.
abstract: BACKGROUND
  The recent evolution in the epidemiology of methicillin-resistant asymptomatic Staphylococcus aureus (MRSA) infections in children, whereby children without traditional risk factors for MRSA have been hospitalized in increasing numbers, prompted us to establish whether a parallel increase in "asymptomatic" MRSA colonization had occurred.
  
  
  METHODS
  We cultured the nares and perineum of 500 children attending our Pediatric Emergency Department.
  
  
  RESULTS
  One hundred thirty-two (26.4%) of these children were colonized with S. aureus. Eleven (8.3%) of the S. aureus isolates were MRSA; 4 (36.4%) of the 11 subjects colonized with MRSA had no risk factors. Seven (5.3%) of the 132 S. aureus isolates were borderline methicillin-resistant S. aureus (BRSA); 5 (71.4%) of the 7 subjects colonized with BRSA had no MRSA risk factors.
  
  
  CONCLUSIONS
  These findings indicate that MRSA and BRSA isolates are circulating in the community and that MRSA isolates are no longer confined to children with frequent contact with a health care environment.
authors.affiliation: Department of Pediatrics, The University of Chicago Children's Hospital, IL, USA.
authors.forename: A H
authors.initials: AH
authors.lastname: Suggs
authors.forename: M C
authors.initials: MC
authors.lastname: Maranan
authors.forename: S
authors.initials: S
authors.lastname: Boyle-Vavra
authors.forename: R S
authors.initials: RS
authors.lastname: Daum
mesh_terms: D000293:Adolescent; D002353:Carrier State / Q000382:microbiology*; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D016106:Methicillin Resistance; D008826:Microbial Sensitivity Tests; D009666:Nose / Q000382:microbiology; D010068:Oxacillin / Q000494:pharmacology; D010406:Penicillins / Q000494:pharmacology; D010502:Perineum / Q000382:microbiology; D012307:Risk Factors; D013203:Staphylococcal Infections / Q000382:microbiology*; D013211:Staphylococcus aureus / Q000187:drug effects* / Q000302:isolation & purification
chemical_list: D010406:Penicillins; D010068:Oxacillin