Multidrug-resistant Pseudomonas aeruginosa bacteria, 3D computer illustration based on scanning electron microscopy (SEM) imagery. P. aeruginosa is a common cause of healthcare-associated infections including pneumonia, bloodstream infections, urinary tract infections, and surgical site infections. Some strains have been found to be resistant to nearly all or all antibiotics including aminoglycosides, cephalosporins, fluoroquinolones, and carbapenems.