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© Research
Publication : Enfermedades infecciosas y microbiologia clinica

[Extended-spectrum beta-lactamases in enterobacteria other than Escherichia coli and Klebsiella]

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Enfermedades infecciosas y microbiologia clinica - 01 Jan 2010

Seral García C, Pardos de la Gándara M, Castillo García FJ

Link to Pubmed [PMID] – 20172418

Enferm. Infecc. Microbiol. Clin. 2010 Jan;28 Suppl 1:12-8

Methods for detecting ESBL-producing Enterobacteriaceae begin by a correct interpretation of the susceptibility profiles, applying the usual criteria for interpretative reading of the antibiogram. Appropriate confirmatory methods will be consequently chosen, based on the inhibition of the enzyme by betalactamases inhibitors, generally clavulanic acid. In case of non-AmpC-producing Enterobacteriaceae, at least two substrates should be used -cefotaxime or ceftriaxone and ceftazidime- to detect enzymes with a low hydrolytic activity against both substrates. Cefepime or AmpC-inhibitors should be recommended for AmpC-producing microorganisms. The identification of the enzymes responsible for the confirmed ESBL phenotype can be performed, either in the clinical laboratory or in reference centres, following a protocol of biochemical and molecular reactions able to detect and characterize, at least, those genes more frequently related to the predominant phenotypic profiles in our region. It is important to know which are the most prevalent combinations enzyme-microorganism, the vehicles for the genetic transmission involved in their dissemination, and the main epidemiological characteristics of the infections that they produce, in order to establish the dimensions of the problem and conduct surveillance studies, with the aim of achieving measures to control the wide spread.

https://www.ncbi.nlm.nih.gov/pubmed/20172418