Estudio epidemiológico de portadores nasales de Staphylococcus aureus en centros de mayores

Translated title of the contribution: Epidemiological study of Staphylococcus aureus nasal carriage in senior people centers

Leire Otaolea Santacoloma, J. M. Eiros Bouza, R. Ortiz De Lejarazu, P. Carrero González, F. Chaves Sánchez, F. J. Luquero Alcalde

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The observation of an increasing number of methicillin-resistant Staphylococcus aureus (MRSA) isolates in some population groups prompted us to study the risk factors and the epidemiological profile of S. aureus nasal carriage in healthy adults 65 years of age and older residing in the province of Segovia. Attention was particularly focused on the possibility that some of the infections were community-acquired. We conducted a prospective and observational study of people who usually visited senior citizen centers in the province of Segovia (Carbonero, Cuéllar, Cantalejo) and its capital. The analysis period took place between January and May 2003. Infections were classified as community-acquired, hospital-acquired or health-care associated. Isolates of methicillin-resistant (MUSA) and methicillin-susceptible S. aureus (MSSA) were studied by pulsed-field gel electrophoresis (PFGE). There were 34 (19.5%) The prevalence of nasal carriage of S. aureus was 79.5% and that for MRSA was 1.1%. Female sex was significantly associated with the carriage state. All S. aureus isolates were mupirocin-susceptible. 100% susceptibility and specificity was obtained through latex agglutination testing. The molecular study showed that the transmission for MRSA was monoclonal and that for MSSA was more policlonal. The results presented here form the basis for similar studies in other Spanish senior citizen centers and provide evidence that MRSA strains are beginning to circulate and are becoming significantly established within the community, thus highlighting the need for implementing control strategies to prevent dissemination.

Translated title of the contributionEpidemiological study of Staphylococcus aureus nasal carriage in senior people centers
Original languageSpanish
Pages (from-to)339-345
Number of pages7
JournalRevista Espanola de Quimioterapia
Issue number3
StatePublished - Sep 2007
Externally publishedYes


  • Molecular epidemiology
  • Staphylococcus aureus nasal carriage

ASJC Scopus subject areas

  • Pharmacology
  • Microbiology (medical)


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