title: [The frequency and antibiotic susceptibility of Staphylococcus aureus from nasal swabs in an suburban marginal population in Lima, Peru].
abstract: OBJECTIVE
  To determine the frequency and associated factors of nasal colonization by Staphylococcus aureus and its antibiotic susceptibility pattern in a marginal suburban population Lima, Peru.
  
  
  METHODS
  A cross-sectional study was conducted among population of all ages from a marginal suburban district in northern Lima. The study used a convenience sample. Each person was surveyed and provided a swab sample of the nostrils. The swab samples were analyzed to identify Staphylococcus aureus, determining the susceptibility pattern by the Kirby Bauer disk diffusion method.
  
  
  RESULTS
  From the 452 participants recruited, ages between 1 and 84 years, the frequency of Staphylococcus aureus nasal colonization was 24.6%, with 0.9% of them resistant to methicillin. The only factor associated with nasal colonization was age equal or less than 11 years (OR: 3.80, 95% CI 1.42 to 10.16). Most strains were resistant to penicillin (96.4%) but also to erythromycin (10.9%), clindamycin (7.3%) and gentamicin (4.5%).
  
  
  CONCLUSIONS
  The frequency of Staphylococcus aureus nasal colonization was similar to other studies worldwide, with predominance of methicillin-sensitive strains.
authors.affiliation: Facultad de Medicina Alberto Hurtado, Universidad Peruana Cayetano Heredia, Lima, Perú. edgar_carmona@hotmail.com
authors.forename: Edgar
authors.initials: E
authors.lastname: Carmona
authors.forename: Seyzo
authors.initials: S
authors.lastname: Sandoval
authors.forename: Coralith
authors.initials: C
authors.lastname: García
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D002353:Carrier State; D002648:Child; D002675:Child, Preschool; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008826:Microbial Sensitivity Tests; D008875:Middle Aged; D009296:Nasal Cavity / Q000382:microbiology; D010568:Peru; D013211:Staphylococcus aureus / Q000187:drug effects* / Q000302:isolation & purification; D018881:Suburban Health; D055815:Young Adult
chemical_list: D000900:Anti-Bacterial Agents