Prevalence of extended-spectrum beta-lactamase producing Escherichia coli in community-onset urinary tract infections in France in 2013

Summary Objectives We sought to assess the importance of extended-spectrum beta-lactamase (ESBL) producing Enterobacteriaceae in urinary tract infections in outpatients in France. Methods Retrospective laboratory based survey analysing susceptibility patterns of Escherichia coli and Klebsiella pneumoniae isolates providing from urines collected from outpatients during three months in 2013. Results Four hundred and ninety-nine laboratories collected data on 51,643 E. coli and 3495 K. pneumoniae isolates. The overall proportion of ESBL-producing E. coli was 3.3%. The proportion was higher for males (4.8%) than for females (3.0%) and increased with age: 2% for patients 80 years. More than 95% of isolates we susceptible to cefixime, fosfomycin, and nitrofurantoin. In nursing homes, the ESBL-producing E. coli proportion was 12.1%. For K. pneumoniae , the proportion of ESBL-positive isolates was 6.6%, and this proportion increased with age. Data from 2010 collected from a subset of the network showed that the ESBL-producing E. coli proportion was 2.0%. Conclusion ESBL-producing isolates were rather frequent in urines in French outpatients in 2013. Males and persons residing in nursing homes were at higher risk of ESBL-positive infection. Despite the increase in ESBL-positive isolates, the susceptibility to antibiotics used to treat cystitis remains high.