Journal article
Hyperexpression of α-hemolysin explains enhanced virulence of sequence type 93 community-associated methicillin-resistant Staphylococcus aureus
Kyra YL Chua, Ian R Monk, Ya-Hsun Lin, Torsten Seemann, Kellie L Tuck, Jessica L Porter, Justin Stepnell, Geoffrey W Coombs, John K Davies, Timothy P Stinear, Benjamin P Howden
BMC Microbiology | Springer Nature | Published : 2014
Abstract
BackgroundThe community-associated methicillin-resistant S. aureus (CA-MRSA) ST93 clone is becoming dominant in Australia and is clinically highly virulent. In addition, sepsis and skin infection models demonstrate that ST93 CA-MRSA is the most virulent global clone of S. aureus tested to date. While the determinants of virulence have been studied in other clones of CA-MRSA, the basis for hypervirulence in ST93 CA-MRSA has not been defined.ResultsHere, using a geographically and temporally dispersed collection of ST93 isolates we demonstrate that the ST93 population hyperexpresses key CA-MRSA exotoxins, in particular α-hemolysin, in comparison to other global clones. Gene deletion and comple..
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