• Int. J. Med. Microbiol. · Aug 2011

    Staphylococcus aureus nasal carriage, virulence traits, antibiotic resistance mechanisms, and genetic lineages in healthy humans in Spain, with detection of CC398 and CC97 strains.

    • Carmen Lozano, Elena Gómez-Sanz, Daniel Benito, Carmen Aspiroz, Myriam Zarazaga, and Carmen Torres.
    • Area Bioquímica y Biología Molecular, Universidad de La Rioja, Madre de Dios 51, 26006 Logrono, Spain.
    • Int. J. Med. Microbiol. 2011 Aug 1;301(6):500-5.

    AbstractS. aureus nasal carriage was investigated in 278 healthy humans, determining the antibiotic resistance mechanisms, virulence traits, and genetic lineages of recovered isolates. Nasal samples were cultured in specific media for S. aureus and methicillin-resistant S. aureus (MRSA) recovery. S. aureus was detected in 53 of 278 nasal samples (19.1%): MRSA was found in one sample (0.4%) and methicillin-susceptible S. aureus (MSSA) in the remaining 52 samples. The MRSA isolate was typed as ST1649-t701-agrI-SCCmec-IVc and only exhibited resistance to beta-lactams. A high diversity of spa types (n=37) was identified among the 52 MSSA, identifying 5 new spa-types. Multi-locus sequence typing (MLST) typing was performed in 30 selected MSSA, detecting 16 different sequence types, 2 of them being new. MSSA strains presented agr types I (30.2%), II (30.2%), III (34%), and IV (5.6%). Eleven strains showed erythromycin resistance and harbored different combinations of erm(A), erm(B), erm(C), erm(T), and msr(A) genes. Two strains exhibited ciprofloxacin resistance, and one of them presented amino acid changes in GyrA and GrlA proteins. The presence of 28 genes encoding staphylococcal toxins was investigated by PCR in all 53 S. aureus isolates. The toxic shock syndrome toxin 1 (TSST-1) gene was detected in 15 MSSA isolates (11 of them typed within the clonal complex CC30) and the gene of exfoliative toxin A in 2 strains. Different combinations of enterotoxin genes were identified among S. aureus strains. None of the S. aureus isolates harbored the Panton-Valentine leukocidin gene. Two MSSA presented the sequence-type ST398 [harboring erm(T) gene], and 2 additional isolates were typed as ST97. Interestingly, MSSA CC398 and CC97 isolates were detected. These clonal complexes are associated with food-producing animals.Copyright © 2011 Elsevier GmbH. All rights reserved.

      Pubmed     Full text   Copy Citation     Plaintext  

      Add institutional full text...

    Notes

     
    Knowledge, pearl, summary or comment to share?
    300 characters remaining
    help        
    You can also include formatting, links, images and footnotes in your notes
    • Simple formatting can be added to notes, such as *italics*, _underline_ or **bold**.
    • Superscript can be denoted by <sup>text</sup> and subscript <sub>text</sub>.
    • Numbered or bulleted lists can be created using either numbered lines 1. 2. 3., hyphens - or asterisks *.
    • Links can be included with: [my link to pubmed](http://pubmed.com)
    • Images can be included with: ![alt text](https://bestmedicaljournal.com/study_graph.jpg "Image Title Text")
    • For footnotes use [^1](This is a footnote.) inline.
    • Or use an inline reference [^1] to refer to a longer footnote elseweher in the document [^1]: This is a long footnote..

    hide…

Want more great medical articles?

Keep up to date with a free trial of metajournal, personalized for your practice.
1,706,642 articles already indexed!

We guarantee your privacy. Your email address will not be shared.