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. 2016 Jun;54(6):445-50.
doi: 10.1007/s12275-016-6157-x. Epub 2016 May 27.

Characteristics of the community-genotype sequence type 72 methicillin-resistant Staphylococcus aureus isolates that underlie their persistence in hospitals

Eun-Jeong Joo  1 , Ji-Young Choi  2 , Doo Ryeon Chung  3   4 , Jae-Hoon Song  3   4 , Kwan Soo Ko  5   6
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Characteristics of the community-genotype sequence type 72 methicillin-resistant Staphylococcus aureus isolates that underlie their persistence in hospitals

Eun-Jeong Joo et al. J Microbiol. 2016 Jun.

Abstract

Panton-Valentine leukocidin-negative methicillin-resistant Staphylococcus aureus (MRSA) clone ST72, known as a major community-associated MRSA in Korea, has emerged as an important pathogen in hospitals. To understand bacterial properties that underlie transformation of this clone into a nosocomial pathogen, we compared characteristics of the community-genotype ST72 MRSA isolates with those of ST5 and ST239 MRSA, which have been predominant nosocomial MRSA clones in Korea. Several genes associated with adhesion and virulence were absent or rarely found in ST72 isolates. Many ST72 isolates (70.1%) belonged to agr group I, but the agr group of other ST72 isolates could not be determined. As indicated by d-hemolysin production, ST72 isolates expressed fully functional agr, whereas agr dysfunction was observed in ST5 and ST239 isolates. In the biofilm formation assay, no upregulation of biofilm-forming activity of ST72 MRSA was detected. However, ST72 isolates demonstrated persistence under hypotonic and desiccating conditions (survival rates 72.3% and 33.9%, respectively), which was similar to characteristics of ST5 or ST239 isolates. ST72- MRSA isolates showed low virulence, but properties of their functional agr system could facilitate their spread in hospitals. In conclusion, tolerance to stressful environments, e.g., hypotonic and dry conditions, may also contribute to survival of the community-associated MRSA clones in healthcare facilities.

Keywords: CA-MRSA; ST239; ST5; ST72; healthcare-associated infection; skin and soft tissue infections.

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References

    1. J Med Microbiol. 2011 Apr;60(Pt 4):442-5 - PubMed
    1. FEMS Microbiol Lett. 2009 Dec;301(2):224-31 - PubMed
    1. Antimicrob Agents Chemother. 2011 Mar;55(3):1082-7 - PubMed
    1. J Infect Dis. 2010 Nov 15;202(10):1593-9 - PubMed
    1. Diagn Microbiol Infect Dis. 2011 May;70(1):112-8 - PubMed

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