[Hospital and community-acquired β-lactamases-producing Escherichia coli and Klebsiella pneumoniae at hospitals in Hermosillo, Sonora].

OBJECTIVE

To determine the prevalence of extended-spectrum β-lactamases (ESBL)-producing Esherichia coli and Klebsiella pneumoniae in hospitals of Hermosillo, Sonora, Mexico.

MATERIAL AND METHODS

To detect ESBL-production, 1 412 bacterial isolates obtained over a one year period (2008-2009) were analyzed using the double-disk synergy test, with and without clavulanic acid.

RESULTS

Hospitalaryacquired ESBL-producing E.coli and K.pneumoniae (31.8% and 35.3%) were isolated with higher prevalence that community-acquired isolates (14.4% and 0.0%) (p<0.005).

CONCLUSIONS

Our study shows the presence of ESBL-producing bacteria in the three hospitals.