Laboratory findings Lab tests showed a slightly elevated white blood cell count of 13, 000/ul; 66%% were PMNs, also elevated.. Culture yielded more than 105 colony-forming units(CFU/ml) of E coli (diagnostic of a urinary tract infection) Antimicrobial susceptibility tests were not done Treatment The patient was cured by 3 days of oral sulfamethoxazole-trimethoprim therapy. 2016/5/5 E. coli-Junqi's Lecture2016/5/5 E.coli-Junqi's Lecture 5 Laboratory Findings Lab tests showed a slightly elevated white blood cell count of 13,000/ul; 66% were PMNs, also elevated….Culture yielded more than 105 colony-forming units (CFU/ml) of E.coli (diagnostic of a urinary tract infection). Antimicrobial susceptibility tests were not done. Treatment The patient was cured by 3 days of oral sulfamethoxazole-trimethoprim therapy