Key Findings

The study identifies several extended-spectrum beta-lactamase (ESBL) and AmpC beta-lactamase genes, including bla CTX-M-14a, bla CTX-M-90, bla CTX-M-15, bla CTX-M-12, bla CTX-M-2, bla CTX-M-14b, bla TEM-52, bla SHV-12, bla CMY-2, and bla DHA-1, in clinical isolates of Proteus mirabilis from Korea. These genes were found to be responsible for resistance to various β-lactam antibiotics.