To investigate the rectal carriage of multidrug-resistant Enterobacteriaceae (colistin resistant, ESBL-producers and/or carbapenemase-producers) among health care workers (HCWs) from six Spanish hospitals.
Rectal swabs from 258 HCWs, employed in intensive care units, hematology wards and clinical microbiology laboratories from six hospitals in northern Spain were studied. They were cultured in selective media for Gram negative resistant bacteria. Detection of antimicrobial resistance genes and MLST were performed by PCR and further sequencing. A questionnaire including data related to risk factors of colonization/infection by resistant bacteria (age, gender, chronic diseases, immunosuppressive therapies, invasive procedures or antimicrobial treatments) was given to each participant.
No carbapenemase-producing Enterobacteriaceae were recovered. However, 8/258 HCWs (3.1%) were positive for ESBL-producing isolates. This rate was not higher than the colonization rate previously reported in Spain for healthy people in the community. Five isolates showed high level resistance to colistin (MICs ranging from 8 mg/L to 128 mg/L) but all of them were negative for the mcr genes tested. No statistically-significant risk factors for gut colonization by ESBL-producing or colistin resistant Enterobacteriaceae were identified among the HCW participating in the study.
Our data suggest that working in hospitals does not represent a risk for rectal carriage of multidrug resistant Enterobacteriaceae.
Copyright © 2020 European Society of Clinical Microbiology and Infectious Diseases. Published by Elsevier Ltd. All rights reserved.
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