Changing epidemiology of extended-spectrum ß-lactamases in Argentina: emergence of CTX-M-15.

SENATTI SAMANTA; SANTELLA GISELA; DI CONZA JOSÉ; PALLECCHI LUCCIA; PINO MARYLÚ; GHIGLIONE BÁRBARA; ROSOLLINI GIAN MARIA; RADICE MARCELA; GUTKIND GABRIEL

ANTIMICROBIAL AGENTS AND CHEMOTHERAPY

AMER SOC MICROBIOLOGY

Lugar: Washington; Año: 2012 vol. 56 p. 6003 - 6005

0066-4804

A multicenter survey, carried out in 2010 in Argentina, showed an increased prevalence of ESBL-producing enterobacteria, with some changes in the molecular epidemiology of circulating ESBLs. While enzymes of the CTX-M-2 group remain endemic, the emergence of CTX-M-15 and of enzymes of the CTX-M-8 and CTX-M-9 groups was observed. The CTX-M-15-positive isolates represented 40% of CTX-M-producers and included representatives of Escherichia coli ST131 and of Klebsiella pneumoniae ST11.