Squamous cells as predictors of bacterial contamination in urine samples

Annals of Emergency Medicine
F G WalterD J Roe

Abstract

To determine whether squamous cells in urine indicate bacterial contamination. We prospectively studied 105 consecutive women who presented to the emergency department with symptoms suggestive of a urinary tract infection. Two urine samples were collected from each woman, a midstream clean-catch (MSCC) sample and a catheterized (CATH) sample. Microscopic urinalyses to assess for squamous cells and urine cultures to assess for bacterial contamination were performed on all samples. Bacterial contamination was defined as growth of fewer than 10,000 colonies of a single species per milliliter or growth of three or more species of commensal bacteria (mixed flora) in a urine sample. Squamous cells were found in 99 of 105 CATH samples (94%); however, no CATH samples had bacterial contamination. Squamous cells were found in 101 of 105 MSCC samples (96%); however, only 22 MSCC samples (21%) had bacterial contamination. The presence of squamous cells in CATH urine samples obtained from women is not indicative of bacterial contamination. The presence of squamous cells in MSCC urine samples obtained from women also is not a good indicator, with an overall predictive value for bacterial contamination of 21%.

References

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Citations

Nov 22, 2005·Medicinski pregled·Gordana Bojić-MilicevićRadomir Dautović
Dec 5, 2003·The American Journal of Emergency Medicine·Ken O KreidlSam E Mansour
Aug 11, 2004·Mayo Clinic Proceedings·Loren G Miller, Angela W Tang
Jan 20, 2016·Academic Emergency Medicine : Official Journal of the Society for Academic Emergency Medicine·Nicholas M MohrBrett Faine
Nov 7, 2016·The Journal of Emergency Medicine·Patrick Joseph MaherMedley O'Keefe Gatewood
Jan 25, 2013·Obstetrics and Gynecology·Caroline SchneebergerSuzanne E Geerlings
May 1, 2019·Annals of Laboratory Medicine·Victoria Ortiz de la TablaFélix Gutiérrez
Oct 27, 1999·Nephrology, Dialysis, Transplantation : Official Publication of the European Dialysis and Transplant Association - European Renal Association·M Franz, W H Hörl
Nov 2, 2016·Journal of Clinical Pathology·Giuseppe Enrico Bignardi

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