Abstract
Nonsusceptible (NS) and multidrug-resistant (MDR) Pseudomonas aeruginosa (PsA) infections are associated with considerable mortality. This retrospective study assessed NS PsA and MDR PsA prevalence in US intensive care unit (ICU) and non-ICU settings. We evaluated nonduplicate PsA isolates collected in 2017. Data were classified by hospital admission setting. PsA isolates were evaluated for NS to each of 4 drug classes and MDR. Significantly higher rates of NS PsA and MDR PsA were found in ICU versus non-ICU settings (P < .001), except for respiratory isolates, which had high rates regardless of setting; rates also correlated with source, hospital size, urban/rural status, and geographic region. NS PsA isolates for each antibacterial category (except fluoroquinolones) and MDR PsA were significantly more likely to be classified as hospital-onset than admission-onset (P < .001). These data are consistent with previous reports and emphasize the importance of testing for resistant infection upon admission and when treating hospital-acquired infections.
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