Clinical and demographic features associated with infections with extended-spectrum beta-lactamase–producing Escherichia coli in a health system in Maine, 2017

In this case–case control study, we identified receipt of β-lactam antibiotics and older age as independently associated with increased infection risk with ESBL-producing Escherichia coli among residents aged 20–88 years in a rural Maine hospital system where the infection prevalence of antibiotic-resistant E. coli is low.