Bugs causing UTIs Bugs causing UTIs Bug (Bacteria only) Comments E. coli #1 leading cause of UTI S. saprophyticus #2 leading cause of UTI, common in young, sexually active women K. pneumoniae Proteus P. aeruginosa Common cause in patients with indwelling catheters Serratia Enterobacter cloacae E. faecalis Urinary tract infections login to view 13 more bullets Diagnosis login to view 2 more bullets Predisposing factors login to view 7 more bullets Epidemiology login to view 5 more bullets