Emergence of multidrug-resistant Acinetobacter baumannii producing OXA-23 carbapenemase, Nigeria

Acinetobacter baumannii is a nonfermentative Gram-negative bacterium commonly found in water and soil.1 Over the last decade it has become a serious emerging community and nosocomial pathogen worldwide, known to be responsible for life-threatening infections.2 Carbapenems are the most commonly used antibiotics for treating infections caused by A. baumannii, but an increase in carbapenem-resistant strains of A. baumannii has been reported worldwide over the last decade,3 mainly through the production of metallo-beta-lactamases (MBLs) or oxacillinases (carbapenem-hydrolyzing class D beta-lactamases (CHDLs)).