Aspergillus Outbreak in an Intensive Care Unit: Source Analysis with Whole Genome Sequencing and Short Tandem Repeats.

Autor: Hiel SJP; Department of Intensive Care, Máxima Medical Centre, De Run 4600, 5504 DB Veldhoven, The Netherlands., Hendriks ACA; Centre for Infectious Disease Control, National Institute for Public Health and the Environment, Antonie van Leeuwenhoeklaan 9, 3721 MA Bilthoven, The Netherlands.; Department of Medical Microbiology, Radboud University Medical Centre, Geert Grooteplein Zuid 10, 6525 GA Nijmegen, The Netherlands., Eijkenboom JJA; Department of Intensive Care, Máxima Medical Centre, De Run 4600, 5504 DB Veldhoven, The Netherlands., Bosch T; Centre for Infectious Disease Control, National Institute for Public Health and the Environment, Antonie van Leeuwenhoeklaan 9, 3721 MA Bilthoven, The Netherlands., Coolen JPM; Department of Medical Microbiology, Radboud University Medical Centre, Geert Grooteplein Zuid 10, 6525 GA Nijmegen, The Netherlands., Melchers WJG; Department of Medical Microbiology, Radboud University Medical Centre, Geert Grooteplein Zuid 10, 6525 GA Nijmegen, The Netherlands., Anröchte P; Department of Infection Prevention and Control, Máxima Medical Centre, De Run 4600, 5504 DB Veldhoven, The Netherlands., Camps SMT; Department of Infection Prevention and Control, Máxima Medical Centre, De Run 4600, 5504 DB Veldhoven, The Netherlands., Verweij PE; Centre for Infectious Disease Control, National Institute for Public Health and the Environment, Antonie van Leeuwenhoeklaan 9, 3721 MA Bilthoven, The Netherlands.; Department of Medical Microbiology, Radboud University Medical Centre, Geert Grooteplein Zuid 10, 6525 GA Nijmegen, The Netherlands., Zhang J; Centre for Infectious Disease Control, National Institute for Public Health and the Environment, Antonie van Leeuwenhoeklaan 9, 3721 MA Bilthoven, The Netherlands., Dommelen LV; Stichting PAMM, Laboratory of Medical Microbiology, De Run 6250, 5504 DL Veldhoven, The Netherlands.
Jazyk: angličtina
Zdroj: Journal of fungi (Basel, Switzerland) [J Fungi (Basel)] 2024 Jan 06; Vol. 10 (1). Date of Electronic Publication: 2024 Jan 06.
DOI: 10.3390/jof10010051
Abstrakt: Whole genome sequencing (WGS) is widely used for outbreak analysis of bacteriology and virology but is scarcely used in mycology. Here, we used WGS for genotyping Aspergillus fumigatus isolates from a potential Aspergillus outbreak in an intensive care unit (ICU) during construction work. After detecting the outbreak, fungal cultures were performed on all surveillance and/or patient respiratory samples. Environmental samples were obtained throughout the ICU. WGS was performed on 30 isolates, of which six patient samples and four environmental samples were related to the outbreak, and twenty samples were unrelated, using the Illumina NextSeq 550. A SNP-based phylogenetic tree was created from outbreak samples and unrelated samples. Comparative analysis (WGS and short tandem repeats (STRs), microsatellite loci analysis) showed that none of the strains were related to each other. The lack of genetic similarity suggests the accumulation of Aspergillus spores in the hospital environment, rather than a single source that supported growth and reproduction of Aspergillus fumigatus . This supports the hypothesis that the Aspergillus outbreak was likely caused by release of Aspergillus fumigatus spores during construction work. Indeed, no new Aspergillus cases were observed in the ICU after cessation of construction. This study demonstrates that WGS is a suitable technique for examining inter-strain relatedness of Aspergillus fumigatus in the setting of an outbreak investigation.
Competing Interests: The authors declare no conflict of interest.
Databáze: MEDLINE
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