Tailoring Antimicrobial Susceptibility Testing to Individual Species of Coagulase-Negative Staphylococci: Next Up, Staphylococcus epidermidis

November 23, 2019 at 10:30 am

Journal of Clinical Microbiology December 2019 V.57 N.12

Accurate detection of methicillin resistance among staphylococci is vital for patient care. Methicillin resistance is most commonly mediated by acquisition of the mecA gene, which encodes an altered penicillin binding protein, PBP2a.

Application of phenotypic methods to detect mecA-mediated beta-lactam resistance in staphylococci is becoming more complex as species-specific differences are identified among coagulase-negative staphylococci (CoNS).

Previously, interpretative criteria and antimicrobial susceptibility testing (AST) methods specific to the CoNS group were used to evaluate Staphylococcus epidermidis.

A manuscript by S. N. Naccache, K. Callan, C.-A. D. Burnham, M. A. Wallace, et al. (J Clin Microbiol 57:e00961-19, 2019, https://doi.org/10.1128/JCM.00961-19) details experiments revealing that S. epidermidis, the most common clinically isolated CoNS, requires tailored use of previously described methods and interpretive criteria to reliably identify the presence of mecAmediated methicillin resistance.

FULL TEXT

https://jcm.asm.org/content/57/12/e01391-19.abstract?etoc

PDF

https://jcm.asm.org/content/jcm/57/12/e01391-19.full.pdf

 

 

Entry filed under: Antimicrobianos, Bacterias, Bacteriemias, BIOFILM - BIOPELICULAS, Biología Molecular, Epidemiología, Metodos diagnosticos, REPORTS, Resistencia bacteriana, Sepsis, Update.

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