Potential Perinatally Acquired Extended Spectrum β-Lactamase Escherichia coli Urinary Tract Infection in an Infant.

Extended-spectrum β-lactamases (ESBL) are produced mainly by members of the Enterobacteriaceae family and confer resistance to most β-lactam antibiotics. Because of limited treatment options, ESBL infections are typically more challenging to treat resulting in poor outcomes, increased complications, and mortality. Because ESBL-producing organisms are primarily seen in critically ill patients, along with those patients having prolonged hospital stays, extensive courses of antimicrobials, and/or use of invasive medical devices (i.