Abstract |
The present study reports the evolution of the demographic characteristics and the molecular epidemiology of community-acquired methicillin-resistant Staphylococcus aureus (CA-MRSA) in Belgium from 2005 to 2009. Four hundred and ten CA-MRSA isolates were prospectively collected and screened for the presence of Panton-Valentin leucocidin (PVL) and toxic shock syndrome toxin 1 (TSST-1) encoding genes, while clinical information were recorded. PVL- and TSST-1-positive isolates were genotyped by pulsed-field gel electrophoresis (PFGE). Staphylococcal cassette chromosome mec (SCCmec) type, spa type and multilocus sequence type (MLST) were determined on representative isolates. One hundred and fifty-nine (39 %) isolates were PVL-positive. PVL-positive isolates were significantly more frequently isolated from skin or soft tissue than PVL-negative isolates, causing mainly subcutaneous abscesses and furuncles. Patients with PVL-positive CA-MRSA were significantly younger than patients with PVL-negative CA-MRSA. Eighty-seven percent of the PVL-positive isolates belonged to a limited number (n = 7) of PFGE types belonging to sequence types (ST) ST80, ST8, ST30, ST5, ST152, ST338 and a new ST, a single-locus variant of ST1. A temporal evolution of the distribution of these PFGE types was observed, characterised by (1) the dissemination of the ST8-SCCmecIV arcA-positive (USA300) genotype and (2) a genetic diversification. Forty-seven (11 %) strains were TSST-1-positive, of which 65 % clustered into four PFGE types, all belonging to ST5. The epidemiology of CA-MRSA in Belgium is changing, as the rapid diffusion of the USA300 clone seems to occur, together with a clonal diversification.
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Authors | J Brauner, M Hallin, A Deplano, R De Mendonça, C Nonhoff, R De Ryck, S Roisin, M J Struelens, O Denis |
Journal | European journal of clinical microbiology & infectious diseases : official publication of the European Society of Clinical Microbiology
(Eur J Clin Microbiol Infect Dis)
Vol. 32
Issue 5
Pg. 613-20
(May 2013)
ISSN: 1435-4373 [Electronic] Germany |
PMID | 23232976
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
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Chemical References |
- Anti-Bacterial Agents
- Bacterial Toxins
- DNA, Bacterial
- Enterotoxins
- Exotoxins
- Leukocidins
- Panton-Valentine leukocidin
- Superantigens
- enterotoxin F, Staphylococcal
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Topics |
- Adolescent
- Adult
- Aged
- Aged, 80 and over
- Anti-Bacterial Agents
(pharmacology)
- Bacterial Toxins
(genetics)
- Belgium
(epidemiology)
- Child
- Child, Preschool
- Community-Acquired Infections
(epidemiology, microbiology)
- DNA, Bacterial
(analysis, genetics)
- Drug Resistance, Bacterial
- Enterotoxins
(genetics)
- Exotoxins
(genetics)
- Female
- Humans
- Infant
- Leukocidins
(genetics)
- Male
- Methicillin-Resistant Staphylococcus aureus
(classification, drug effects, genetics, isolation & purification)
- Microbial Sensitivity Tests
- Middle Aged
- Molecular Typing
- Prospective Studies
- Staphylococcal Infections
(epidemiology, microbiology)
- Superantigens
(genetics)
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