TY - JOUR T1 - Staphylococcus aureus carriage in older populations in community residential care homes: Prevalence and molecular characterization of MRSA isolates JO - Enfermedades Infecciosas y Microbiología Clínica T2 - AU - Galán-Sánchez,Fátima AU - Pérez-Eslava,Maria AU - Machuca,Jesús AU - Trujillo-Soto,Teresa AU - Arca-Suarez,Jorge AU - Rodríguez-Iglesias,Manuel SN - 0213005X M3 - 10.1016/j.eimc.2018.05.011 DO - 10.1016/j.eimc.2018.05.011 UR - https://www.elsevier.es/es-revista-enfermedades-infecciosas-microbiologia-clinica-28-articulo-staphylococcus-aureus-carriage-in-older-S0213005X18301988 AB - IntroductionThe epidemiology of S. aureus depends on conditions in specific populations. Few studies of S. aureus colonization in the older population have been performed in Spain. The aim of this study was to determine the prevalence of methicillin-resistant S. aureus (MRSA) colonization and its molecular epidemiological characteristics in an institutionalized population in community residential care homes in Cadiz, Spain. MethodsA cross-sectional epidemiological study was conducted in three residential care homes for older people. Axilla and nostril samples were tested. Identification of S. aureus and antimicrobial susceptibility testing were by MALDI-TOF and MicroScan panels. MRSA strains were subjected to SCCmec typing, multilocus sequence typing (MLST) and pulsed-field gel electrophoresis (PFGE). The presence of Panton–Valentine leukocidin (PVL) genes was determined by PCR in all S. aureus strains. ResultsA total of 293 residents were included. Fifty-one residents (17.4%) were colonized with methicillin-sensitive S. aureus (MSSA) and 11 (3.8%) with MRSA. Resistance to at least two aminoglycosides was observed in 25.4% of MSSA and 90.9% and of MRSA isolates, and resistance to levofloxacin in 80.3% of MSSA and 100% of MRSA isolates. SCCmecIV was detected in all isolates and all except one (ST-125) were ST-8. None of the S. aureus isolates were positive for PVL. ConclusionsA low rate of S. aureus carriage was detected and the prevalence of MRSA was very low. ST8-MRSA-IVc was the dominant clone, and only one strain belonged to ST125-MRSA-IVc. We found MRSA transmission within the residential care homes and a very high rate of quinolone resistance in MSSA and MRSA. ER -