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Rev Esp Quimioter 2017; 30(1):45-49 PDF Imprimir E-mail

Evaluation of an immunochromatographic test for the detection of OXA-48 carbapenemase                     

CONCEPCIÓN MEDIAVILLA-GRADOLPH, ROCÍO SÁINZ-RODRIGUEZ, MIRIAM VALVERDE-TROYA, INMACULADA DE TORO-PEINADO, Mª PILAR BERMUDEZ-RUÍZ, BEGOÑA PALOP-BORRÁS           

Introduction. Detection and differentiation of various types of carbapenemases is crucial to their control and dissemination. OXA -48 is the most common carbapenemase in Spain and in our environment. The aim of this study is the evaluation of a new immunochromatographic test OXA-48 Card letitest (Coris, BioConcept Belgium) to detect this carbapenemase from solid media.
Material and Methods. During the last year 151 strains of carbapenemase producing bacteria have been isolated, of which 136 were OXA-48 (126 Klebsiella pneumoniae, 1 Klebsiella oxytoca, 5 Escherichia coli, 4 Enterobacter cloacae), and 15 producing other carbapenemases . These 15 strains with other 73 carrying other resistance mechanisms (54 extended-spectrum β-lactamases producers and 19 with other mechanisms) were used as negative controls.
Results. One hundred and thirty six strains carrying OXA-48 were positive with the test OXA-48 Card letitest and the 88 species used as controls were negative, resulting in a sensitivity and specificity of 100%.
Discussion. The OXA-48 Card letitest is simple, quick, safe and cheap (approx. 6€/test) and can be used in microbiology laboratories to confirm the production of OXA-48 carbapenemase in clinical isolates.

Rev Esp Quimioter 2017; 30(1):45-49  [pdf]