Noun
enzyme produced by certain bacteria that inactivates penicillin and results in resistance to that antibiotic
Source: WordNetRather than arising by mutation, they represent examples of plasmid acquisition of beta-lactamase genes normally found on the chromosome of Kluyvera species, a group of rarely pathogenic commensal organisms. Source: Internet
The SHV-1 beta-lactamase is most commonly found in K. pneumoniae and is responsible for up to 20% of the plasmid-mediated ampicillin resistance in this species. Source: Internet
The OXA beta-lactamase family was originally created as a phenotypic rather than a genotypic group for a few beta-lactamases that had a specific hydrolysis profile. Source: Internet
Types TEM beta-lactamases (class A) TEM-1 is the most commonly encountered beta-lactamase in Gram-negative bacteria. Source: Internet