Molecular epidemiology of Aspergillus fumigatus: an in-depth genotypic analysis of isolates involved in an outbreak of invasive aspergillosis.
Publication year
2011Source
Journal of Clinical Microbiology, 49, 10, (2011), pp. 3498-503ISSN
Annotation
01 oktober 2011
Publication type
Article / Letter to editor
Display more detailsDisplay less details
Organization
Medical Microbiology
Journal title
Journal of Clinical Microbiology
Volume
vol. 49
Issue
iss. 10
Page start
p. 3498
Page end
p. 503
Subject
N4i 1: Pathogenesis and modulation of inflammation NCMLS 1: Infection and autoimmunityAbstract
We recently reported an outbreak of invasive aspergillosis in the major heart surgery unit of Hospital Gregorio Maranon, Madrid, Spain (T. Pelaez, P. Munoz, J. Guinea, M. Valerio, M. Giannella, C. H. W. Klaassen, and E. Bouza, Clin. Infect. Dis., in press). Aspergillus fumigatus was isolated from clinical samples from 10 patients admitted to the unit during the outbreak period (surgical wound invasive aspergillosis, n = 2; probable pulmonary invasive aspergillosis, n = 4; colonization, n = 4). In the study described here, we have studied the genotypic diversity of the A. fumigatus isolates found in the air and clinical samples. We used short tandem repeats of A. fumigatus (STRAf) typing to analyze the genotypes found in the 168 available A. fumigatus isolates collected from the clinical samples (n = 109) from the patients and from the environmental samples taken from the air of the unit (n = 59). The genotypic variability of A. fumigatus was higher in environmental than in clinical samples. Intrasample variability was also higher in environmental than in clinical samples: 2 or more different genotypes were found in 26% and 89% of clinical and environmental samples, respectively. We found matches between environmental and clinical isolates in 3 of the 10 patients: 1 patient with postsurgical invasive aspergillosis and 2 patients with probable pulmonary invasive aspergillosis. A total of 7 genotypes from 3 different patients and the air grouped together in 2 clusters. Clonally related genotypes and microvariants were detected in both clinical and environmental samples. STRAf typing proved to be a valuable tool for identifying the source of invasive aspergillosis outbreaks and for studying the genotypic diversity of clinical and environmental A. fumigatus isolates.
This item appears in the following Collection(s)
- Academic publications [238441]
- Electronic publications [122512]
- Faculty of Medical Sciences [90373]
- Open Access publications [97508]
Upload full text
Use your RU credentials (u/z-number and password) to log in with SURFconext to upload a file for processing by the repository team.