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Emergence of multidrug-resistant Staphylococcus haemolyticus in neonatal intensive care unit in Southern France, a genomic study.
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- Additional Information
- Source:
Publisher: Taylor & Francis Country of Publication: United States NLM ID: 101594885 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 2222-1751 (Electronic) Linking ISSN: 22221751 NLM ISO Abbreviation: Emerg Microbes Infect Subsets: MEDLINE
- Publication Information:
Publication: 2019- : [Philadelphia, PA] : Taylor & Francis
Original Publication: New York : NPG, 2012-2018.
- Subject Terms:
- Abstract:
An emergence of multidrug-resistant (MDR) Staphylococcus haemolyticus has been observed in the neonatal intensive care unit (NICU) of Nîmes University Hospital in southern France. A case-control analysis was conducted on 96 neonates, to identify risk factors associated with S. haemolyticus infection, focusing on clinical outcomes. Forty-eight MDR S. haemolyticus strains, isolated from neonates between October 2019 and July 2022, were investigated using routine in vitro procedures and whole-genome sequencing. Additionally, five S. haemolyticus isolates from adult patients were sequenced to identify clusters circulating within the hospital environment. The incidence of neonatal S. haemolyticus was significantly associated with low birth weight, lower gestational age, and central catheter use ( p < 0.001). Sepsis was the most frequent clinical manifestation in this series (20/46, 43.5%) and was associated with five deaths. Based on whole-genome analysis, three S. haemolyticus genotypes were predicted: ST1 (6/53, 11%), ST25 (3/53, 5.7%), and ST29 (44/53, 83%), which included the subcluster II-A, predominantly emerging in the neonatal department. All strains were profiled in silico to be resistant to methicillin, erythromycin, aminoglycosides, and fluoroquinolones, consistent with in vitro antibiotic susceptibility tests. Moreover, in silico prediction of biofilm formation and virulence-encoding genes supported the association of ST29 with severe clinical outcomes, while the persistence in the NICU could be explained by the presence of antiseptic and heavy metal resistance-encoding genes. The clonality of S. haemolyticus ST29 subcluster II-A isolates confirms healthcare transmission causing severe infections. Based on these results, reinforced hygiene measures are necessary to eradicate the nosocomial transmission of MDR strains.
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- Contributed Indexing:
Keywords: ST29; Staphylococcus haemolyticus; antiseptic resistance; emergence; healthcare associated infections; multidrug resistance; neonatal intensive care unit; whole-genome sequencing
- Accession Number:
0 (Anti-Bacterial Agents)
- Publication Date:
Date Created: 20240513 Date Completed: 20240526 Latest Revision: 20240530
- Publication Date:
20240530
- Accession Number:
PMC11132433
- Accession Number:
10.1080/22221751.2024.2353291
- Accession Number:
38738561
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