How are urine specimens evaluated in the diagnosis of urinary tract infection (UTI) during pregnancy?

Updated: Aug 17, 2021
  • Author: Raisa O Platte, MD, PhD; Chief Editor: Edward David Kim, MD, FACS  more...
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Several methods are available for specimen evaluation; all have benefits and limitations. The clean-catch specimen reduces, but does not eliminate, the possibility of cross-contamination from the urethra and vagina. The presence of more than 1 organism in a culture usually indicates a contaminated specimen.

The specimen should be sent for evaluation as soon as possible. Specimens that are allowed to sit at room temperature may have falsely elevated colony counts. Refrigerate the specimen at 4°C if it cannot be transported immediately.

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