Reduction in the prevalence of carbapenem-resistant Acinetobacter baumannii and Pseudomonas aeruginosa in New York City.

We compared susceptibilities of Acinetobacter baumannii and Pseudomonas aeruginosa collected during surveillance studies conducted during 2009 and 2013-2014 involving hospitals in New York City. There were significant decreases in the number of carbapenem-resistant A baumannii and P aeruginosa cases during 2013-2014; it appears the institution of effective infection control measures has contributed to this decline. However the number of isolates of A baumannii with OXA-23-type β-lactamase increased during 2013-2014.