Information de reference pour ce titreAccession Number: | 00004548-201305000-00011.
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Author: | Lohr, Iren Hoyland 1,2,*; Rettedal, Siren 3; Natas, Olav B. 1,4; Naseer, Umaer 5,6; Oymar, Knut 2,3; Sundsfjord, Arnfinn 5,6
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Institution: | (1)Department of Medical Microbiology, Stavanger University Hospital, Stavanger, Norway (2)Department of Clinical Medicine, University of Bergen, Bergen, Norway (3)Department of Paediatrics, Stavanger University Hospital, Stavanger, Norway (4)Department of Infection Control, Stavanger University Hospital, Stavanger, Norway (5)Department of Medical Biology, University of Tromso, Tromso, Norway (6)Department of Microbiology and Infection Control, University Hospital of North Norway, Tromso, Norway
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Title: | |
Source: | Journal of Antimicrobial Chemotherapy. 68(5):1043-1048, May 2013.
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Abstract: | Objectives: To investigate the duration of faecal carriage of CTX-M-15-producing Klebsiella pneumoniae in infants colonized during a nosocomial neonatal intensive care unit (NICU) outbreak after discharge from hospital, possible risk factors for long-term colonization and transmission to household contacts (HCs).
Methods: Fifty-one infants colonized with two unrelated clones of CTX-M-15 K. pneumoniae [sequence type (ST) 17 and ST485] during an NICU outbreak and 60 HCs provided faecal and rectal samples, respectively, every 1-3 months after hospital discharge. Extended-spectrum [beta]-lactamase (ESBL)-producing strains of K. pneumoniae were identified on Chrom ID ESBL agar and examined by antimicrobial susceptibility testing. blaCTX-M-15 was detected by PCR and DNA sequencing. Clonal relationship was examined by PFGE.
Results: The median carriage time in infants after discharge was 12.5 months (IQR 9.5-17.5). Stable antimicrobial susceptibility patterns in PFGE-related strains confirmed the intestinal persistence of both outbreak strains. Risk factors for prolonged faecal carriage in infants were delivery by caesarean section [hazard ratio (HR) 2.4, 95% CI 1.1-5.5, P = 0.029] and treatment with antibiotics during hospitalization (HR 4.5, 95% CI 1.6-12.6, P = 0.004). Transmission of CTX-M-15 K. pneumoniae was observed in 9/28 (32%) households. Median carriage length in parents was 2.5 months (IQR 1.0-5.0) (P < 0.001 compared with infants).
Conclusions: Infants may be long-term faecal carriers of ESBL-producing K. pneumoniae after colonization during hospitalization in the neonatal period. Delivery by caesarean section and antibiotic treatment during hospitalization are possible risk factors for prolonged carriage. Faecal ESBL carriage in infants represents a reservoir for intra-household spread of ESBL-producing K. pneumoniae.
(C) British Society for Antimicrobial Chemotherapy 2013. Published by Oxford University Press. All rights reserved.
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Author Keywords: | extended-spectrum [beta]-lactamases; ESBLs; Enterobacteriaceae; children; risk factors.
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Language: | English.
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Document Type: | Original research.
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Journal Subset: | Clinical Medicine. Life & Biomedical Sciences. Pharmacology.
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ISSN: | 0305-7453
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NLM Journal Code: | hd7, 7513617
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DOI Number: | https://dx.doi.org/10.1093/jac/d...- ouverture dans une nouvelle fenêtre
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