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• W4230903450 abstract "Abstract Background : In this study, we evaluated the genetic relatedness of extended-spectrum beta-lactamase-producing Klebsiella pneumoniae (ESBL-KPN) isolates from an outbreak in a neonatal intensive care unit in August 2017 using pulse-field gel electrophoresis (PFGE) and sequence typing, we implemented an active countermeasure to control this outbreak successfully. Methods: The incidence of healthcare-associated ESBL-KPN bacteremia was evaluated before and after initiating enhanced infection control (IC) practices in January 2018. Surveillance cultures were set up and monitored for neonates, medical personnel, and NICU environmental samples. Molecular analyses, including pulse-field gel electrophoresis (PFGE), sequence typing, and ESBL genotyping, were performed for the isolated KPN strains. Results: After implementing the enhanced IC procedures, the healthcare-associated bacteremia rate decreased from 6.0 to 0.0 per 1,000 patient-days. Samples from neonates (n = 11/15, 73.3%), medical personnel (n = 1/41, 2.4%), and medical devices and the environments (6/181, 3.3%) tested positive for ESBL-KPN in the surveillance cultures in December 2017. Active surveillance cultures revealed that 23 of 72 neonates who were screened (31.9%) were colonized with ESBL-KPN between January and March 2018. All the isolates demonstrated closely related PFGE patterns and were identified as ST307 strain carrying the CTX-M-15 gene. Conclusions: Contaminated neonate environments and medical devices, as well as transmission by medical personnel, appeared to be the source of the outbreak of ESBL-KPN infection. We employed an enhanced IC strategy during January-March 2018 and successfully controlled the clonal outbreak of CTX-M-15-positive KPN. ST307 has emerged as an important bacteremia-causing pathogen in the NICU and should be carefully monitored." @default.
• W4230903450 created "2022-05-11" @default.
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• W4230903450 date "2020-02-10" @default.
• W4230903450 modified "2023-09-27" @default.
• W4230903450 title "Successful Control of an Extended-spectrum Beta-lactamase-producing Klebsiella pneumoniae ST307 Outbreak in a Neonatal Intensive Care Unit" @default.
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• W4230903450 doi "https://doi.org/10.21203/rs.2.16751/v3" @default.
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