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 among residents aged 20-88 years in a rural Maine hospital system where the infection prevalence of antibiotic-resistant is low.