RT info:eu-repo/semantics/article T1 The Impact of MRSA Colonization on Healthcare-Associated Infections in Long-Term Care Facility Residents: A Whole-Genome Sequencing-Based Study A1 Arias Rodríguez, María De Los Ángeles A1 Callejón Fernández, Manuel A1 Abreu Rodríguez, Rossana A1 Arias, Ángeles A1 Aguirre-Jaime, Armando A1 Castro Hernández, María Beatriz A1 Ramos Real, María José A1 Pedroso Fernández, Yanet A1 Lecuona, María K1 MRSA K1 long-term care facilities K1 colonization K1 infection K1 prevalence K1 whole-genome sequencing AB Methicillin-resistant Staphylococcus aureus (MRSA) colonization has been considered arisk factor for the development of infection, however, there are no studies that have compared thecolonizing and infecting strains using whole-genome sequencing (WGS). The aim of this study is todetermine the prevalence of and risk factors for MRSA colonization among long-term care facilities(LTCF) residents of Tenerife (Spain), and to analyze the epidemiological relationship between thecolonizing and infecting strains using WGS. A point-prevalence study was carried out at 14 LTCFsin Tenerife from October 2020 to May 2021. Nasal swabs were cultured for MRSA. Colonizedresidents were followed up for two years. A phylogenetic comparison between colonization andinfection strains was performed using WGS. A total of 764 residents were included. The prevalenceof colonization by MRSA was 28.1% (n = 215), of which 12 (5.6%) subsequently developed infection.A close genetic relationship between colonization and infection isolates was found in three of thefour (75%) residents studied. Our study confirms that colonized residents can develop seriousMRSA infections from the same nasal colonization strain. Given the high prevalence of MRSAcolonization in these centers, it is necessary to implement strategies with preventive measures toavoid the development of infection and the transmission of MRSA. SN 2076-2607 YR 2023 FD 2023 LK http://riull.ull.es/xmlui/handle/915/34820 UL http://riull.ull.es/xmlui/handle/915/34820 LA en DS Repositorio institucional de la Universidad de La Laguna RD 07-ago-2024