Culture, Urine

Gray Top Urine Tube

Specimen Type

Test ID LAB239
CPT Code 87086
Group/Individual Test Individual
Laboratory Clinical Microbiology: 984-974-1805
Tube Station 82
Specimen Routine:

Minimum volume:    Gray Tube: 3mL

NOTE: if Minimum volume cannot be obtained for tube, send specimen in original collection cup.

Specify clean-catch; catheter; acute dysuria; pre-/post-prostatic massage; suprapubic tap. Bagged urine is not suitable for culture. See Comments for additional specimen information.

Availability Routine: 24 hours/7 days; Gram stain by request only
Turnaround Time 24-48 hrs
Reference Range For routine culture: (Lower detectable limit = 1000 cfu/ml)
[Lower detectable limit for Acute dysuria, Suprapubic tap, and Post-prostatic massage specimen types = 100 cfu/ml]

Inpatient/UNC Campus Locations: Deliver within 2 hours of collection. Keep Gray-Top Tube at Room Temperature. If specimen is in original collection cup, store refrigerated.

Off Campus/Outreach Locations: Keep Gray-Top Tube at Room Temperature. Specimen stable 48 hours.

NOTE: Bagged urine is not acceptable for culture.
NOTE: Turn-around time may be >48 hrs. if significant growth occurs.

Reviewed by Christopher Parker on December 09, 2021

Note: Reference ranges provided on this web site are for guidance only, and may not reflect the most recent changes. Refer to laboratory reports for current reference data.

UNC Hospitals
McLendon Clinical Laboratories
101 Manning Drive
Chapel Hill, NC 27514