Objetivo. Evaluar los perfiles de sensibilidad in vitrode ertapenem y comparar su actividad con la de otros antibióticos de uso clínico para Enterobacteriaceas de la comunidad en Colombia.Materiales y métodos. Estudio descriptivo en el cual se recolectaron aislamientos clínicos de Enterobacterias provenientes de la comunidad de once hospitales de siete ciudades de Colombia. Los aislamientos se probaron con diferentes antibióticos–incluido el ertapenem– mediante la técnica de microdilución en caldo y la utilización de suspensiones bacterianas según las recomendaciones vigentes del Clinical and Laboratory Standards Institute(CLSI). En un grupo de bacterias con fenotipo compatiblecon la producción de ?-lactamasas de espectro extendido (BLEE), se realizó la prueba confirmatoria de BLEE de Vitek®.Resultados. Se recolectaron 448 cepas; las sitios de aislamiento más frecuentes fueron la piel ylos tejidos blandos (48%), el tracto genitourinario(27%) y las secreciones intraabdominales (16%). La sensibilidad dle ertapenem en todos los aislamientosfue de 100%. Los otros antibióticos presentaron comportamientos variables para cada especie bacteriana.Se resalta que Es cherichia coli presentó 26% de resistencia a las quinolonas. De los 10 aislamientos de E. coli y 5 de Klebsiella con fenotipo sugestivo de producción de BLEE, 4 y 2, respectivamente, se confirmaron como BLEE positivos mediante la pruebaconfirmatoria.
Objective. To evaluate the in vitro susceptibility profile of ertapenem and to compare its activity with other antibiotics in clinical use against community Enterobacteriaceae in Colombia.Materials and methods. A descriptive study in which the clinical isolates of community Enterobacteria were collected in eleven hospitals in seven cities of Colombia. Through a broth microdilution technique and using bacterial suspensions according to the guidelines in force from the Clinical and Laboratory Standards Institute (CLSI), the isolates were tested against different antibiotics including ertapenem. In a group of bacteria with phenotypes compatible with extended spectrum ?-lactamases (BLEE) pro-duction, a confirming BLEE test from Vitek® was performed.Results. 448 strains were collected. The most frequent sources were skin and soft tissues (48%), genitourinary tract (27%) and intraabdominal secretions (16%). Ertapenem’s activity against all the isolates was 100%. The other antibiotics presented variable behaviors according to each bacterial species. It is underlined that Escherichia coli displayed resistance of 26% to quinolones. From the 10 isolates of E. coli and 5 of Klebsiella with a phenotype suggestive of BLEE production, 4 and 2, respectively, were confirmed as BLEE positive through a confirming test.Conclusions. Isolates of community acquired infections are adequately inhibited by ertapenem. There are bacteria resistant to different antibiotics except for carbapenems. The presence of BLEE producer strains is evidenced in the community, which are adequately inhibited in vitro by ertapenem.
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