Utility of the ceftazidime-imipenem antagonism test (CIAT) to detect and confirm the presence of inducible AmpC beta-lactamases among enterobacteriaceae
AUTOR(ES)
Cantarelli, Vlademir Vicente, Inamine, Everton, Brodt, Teresa Cristina Z., Secchi, Carina, Cavalcante, Bianca C., Pereira, Fabiana de Souza
FONTE
Brazilian Journal of Infectious Diseases
DATA DE PUBLICAÇÃO
2007-04
RESUMO
Detection of AmpC beta-lactamase production by enterobacteria has been problematic. Contrary to ESBLs, no specific guidelines are available for detection and confirmation of AmpC production by clinical relevant microorganisms. Moreover, some bacterial species may produce inducible AmpC beta-lactamases that can be easily overlooked by routine susceptibility tests. We reported here a new test based on the strong inducible effect of imipenem on AmpC genes and the consequent antagonism with ceftazidime. This test is very simple and proved to be helpful in detecting AmpC-inducible enzymes among several species of clinical isolates.
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