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Berger-Bächi, Brigitte; Rohrer, Susanne (2002). Factors influencing methicillin resistance in staphylococci. Archives of Microbiology, 178(3):165-171.

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Abstract

Methicillin resistance in staphylococci is due to an acquired penicillin-binding protein, PBP2' (PBP2a). This additional PBP, encoded by mecA, confers an intrinsic resistance to all beta-lactams and their derivatives. Resistance levels in methicillin-resistant Staphylococcus aureus (MRSA) depend on efficient PBP2' production and are modulated by chromosomal factors. Depending on the genetic background of the strain that acquired mecA, resistance levels range from phenotypically susceptible to highly resistant. Characteristic for most MRSA is the heterogeneous expression of resistance, which is due to the segregation of a more highly resistant subpopulation upon challenge with methicillin. Maximal expression of resistance by PBP2' requires the efficient and correct synthesis of the peptidoglycan precursor. Genes involved in cell-wall precursor formation and turnover, regulation, transport, and signal transduction may determine the level of resistance that is expressed. At this stage, however, there is no information available on the functionality or efficacy of such factors in clinical isolates in relation to methicillin resistance levels.

Citations

132 citations in Web of Science®
162 citations in Scopus®
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Additional indexing

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Institute of Medical Microbiology
DDC:570 Life sciences; biology
610 Medicine & health
Language:English
Date:2002
Deposited On:20 Jul 2012 21:13
Last Modified:27 Nov 2013 21:18
Publisher:Springer
ISSN:0302-8933
Publisher DOI:10.1007/s00203-002-0436-0
PubMed ID:12189417

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