Cepas de Escherichia coli productoras de betalactamasas de espectro extendido: origen, características e incidencia en el sur de la provincia de Alicante en el período 1999-2003

The percentage of ESBL-producing E. coli is high in our environment, but it is even more noteworthy its clear trend to increase. It is very remarkable the high percentage of ESBL-producing strains isolated from outpatients. Finally, we emphasize the high percentages of co-resistance to non-beta-lactam antibiotics.