A clean catch, voided urine was collected in the physician's office from a 72-year-old female complaining of burning on urination. The urine was processed in the Microbiology department using a 0.001 mL calibrated loop. The culture grew:
23 colonies of viridans Streptococcus
14 colonies of Staphylococcus not S. aureus
11 colonies of Lactobacillus spp.
These results suggest

Question

Quizplus · Accepted Answer

The presence of viridans Streptococcus, non-S. aureus Staphylococcus, and Lactobacillus spp. in low colony counts from a clean catch, voided urine sample suggests these are contaminants representing normal urethral flora, rather than indicating a urinary tract infection.

A Clean Catch, Voided Urine Was Collected in the Physician's