Article ID Journal Published Year Pages File Type
6115595 Diagnostic Microbiology and Infectious Disease 2015 5 Pages PDF
Abstract
Urine bacterial titers (BTs) are influenced by bacterial and host factors. The impact of an abnormal postvoid residual (PVR) on BT in urine was investigated. A total of 103 inpatients with a urine growing Enterobacteriacae (≥102 CFU/mL) and a PVR measure were analyzed, mostly female (62%), elderly (mean age: 72 years), with urinary tract infection (25% of asymptomatic bacteriuria) due to Escherichia coli (85%). Fifty-two subjects (56%) had BT ≥106 CFU/mL; 48 (53%) had a PVR ≤100 mL, while 26 (25%) had a PVR >250 mL. PVR increased with BT, and a significant (P < 0.0001) threshold was reached for 106 CFU/mL: 100 mL mean PVR for patients with BT ≤105 CFU/mL versus 248 mL for patients with BT >105 CFU/mL. High PVR and BT were associated with complicated infections, concomitant bacteremia, and delayed apyrexia. Screening for patients with BT ≥106 CFU/mL is an easy way to identify patients at high risk for acute retention and voiding disorders.
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