530. The CDC rules that associate urinary catheter use with urinary tract infection fail to measure what we want
Session: Poster Session: Hospital-acquired and Transplant Infections
Friday, October 30, 2009: 12:00 AM
Room: Poster Hall A
Background: The Center for Disease Control (CDC) defines a catheter-associated urinary tract infection (CA-UTI) as one occurring within 7 days of the presence of a urinary catheter (UC) rather than later than 7 days. We examined the odds of a potential UTI based on this time cut-off.
Methods: We merged data on patients hospitalized between July, 2007 and April, 2008 who had both a UC and urine cultures. We excluded patients with ureteral stents, suprapubic catheters, nephrostomy tubes or ileoconduits. We then classified patients based on urine culture results: greater than 105 true urine pathogen (CDC definition of catheter-associated asymptomatic bacteruria); contaminant; or, negative culture. We compared the odds of isolating a true urine pathogen within 7 days or greater than 7 days of a UC.
Results: We reviewed 3791 culture results from 1827 patients. The odds for having asymptomatic bacteruria were the same regardless of the timing of urine culture (within/not within 7 days of a UC) [asymptomatic bacteruria OR 0.93 (95% CI 0.73-1.20)].
Conclusion: Our data does not support the CDC CA-UTI criterion for timing of a urine culture. We did not detect a difference in the risk of asymptomatic bacteruria between cultures drawn within or not within 7 days of a UC. This data may suggest that removal of a UC does not reduce the risk of UTI
David Ansell, MD, MPH1, Raj Behal, MD, MPH1, Brian Harting, MD2, Tricia Johnson, PhD1, Robert McNutt, MD1, Richard Odwazny, MS1, Caroline Thurlow, MD3 and  C. J. thurlow, None..
B. Harting, None..
R. Odwazny, None..
R. Behal, None..
D. Ansell, None..
T. Johnson, None..
R. McNutt, None., (1)Rush University Medical Center, Chicago, IL, (2)Rush University Medical Center, Hinsdale, IL, (3)Rush Univ. Med. Ctr., Chicago, IL