TEM and SHV extended-spectrum β-lactamases (ESBLs) used to be the dominant ESBLs in the 1990s, but more recently, the emergence of CTX-M enzymes have been increasingly recognized worldwide. Gram-negative rods harboring these β-lactamases represent a significant challenge to both clinicians and microbiologists due to the increasing number of reported cases of bacteria-producing ESBLs from the community. We highlight the case of a CTX-M-15-producing Escherichia coli urinary tract isolate causing infection in a patient from the community with no significant risk factors for acquiring E. coli harboring blaCTX-M.
From the *Department of Medicine, and †Division of Infectious Diseases, New York Hospital Queens, Queen, NY; ‡Department of Microbiology, Weill Cornell Medical College, New York City, NY and §Department of Biology, SUNY College at Old Westbury, Old Westbury, NY.
Correspondence to: Amreen Dinani, MD, Department of Medicine, New York Hospital Queens, Queens, NY. E-mail: firstname.lastname@example.org.
The authors have no funding or conflicts of interest to disclose.