Urine Culture, Routine

CPT: 87086
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Test Details

Synonyms

  • Culture, Urine, Routine
  • Midstream Urine Culture, Routine
  • Routine Culture, Urine, Clean Catch
  • Urine Culture, Catheter
  • Urine Culture, Routine, Midvoid Specimen

Test Includes

Culture; quantitation, isolation, identification (additional charges/CPT code[s] may apply), and susceptibility testing of up to two organisms at >10,000 colonies/mL if culture results warrant (additional charges/CPT code[s] may apply). CPT coding for microbiology and virology procedures often cannot be determined before the culture is performed. Requests with only a written order and no test number indicated will be processed according to Default Testing for Routine Microbiology.

Methodology

Culture

Additional Information

A single culture is about 80% accurate in the female; two containing the same organism with a count of 105 or more represent 95% chance of true bacteriuria; three such specimens mean virtual certainty of true bacteriuria. Urinary tract infection is significantly higher in women who use diaphragm-spermicide contraception, perhaps secondary to increased vaginal pH and a higher frequency of vaginal colonization with E coli.1 A single clean voided specimen from an adult male may be considered diagnostic with proper preparation and care in specimen collection. If the patient is receiving antimicrobial therapy at the time the specimen is collected, any level of bacteriuria may be significant. When more than two organisms are recovered, the likelihood of contamination is high; thus, the significance of definitive identification of the organisms and susceptibility testing in this situation is severely limited. A repeat culture with proper specimen collection including patient preparation is often indicated. Periodic evaluation of diabetics and pregnant women for asymptomatic bacteriuria has been recommended.2 Institutionalized patients, especially elderly individuals, are prone to urinary tract infections, which can be severe.3 Cultures of specimens from Foley catheters yielding multiple organisms with high colony counts usually represents colonization of the catheter and not true significant bacteriuria. Most laboratories limit the number of organisms that will be identified when recovered from urine to two. Similarly, most do not routinely perform susceptibility tests on isolates from presumably contaminated specimens. Failure to recover aerobic organisms from patients with pyuria or positive Gram stains of urinary sediment may indicate the presence of mycobacteria or anaerobes.

Specimen Requirements

Specimen

Urine

Volume

To fill line on Vacutainer® gray-top urine culture transport tube

Container

Vacutainer® gray-top urine culture transport tube with preservative

Patient Preparation

See Urine Culture, Comprehensive [008086].

Storage Instructions

Maintain specimen at room temperature.

Causes for Rejection

Unrefrigerated specimen older than two hours may be subject to overgrowth and may not yield valid results; unlabeled specimen or name discrepancy between specimen and request label; specimen in expired transport container; specimen received after prolonged delay (usually more than 36 hours for urine); specimen collected via Foley catheter; unpreserved specimen

Clinical Information

Special Instructions

Specimens from other sources, such as genital, stool, urine, upper and lower respiratory specimens, cannot be cultured under the aerobic bacterial culture test number. If specimens are incorrectly submitted with an order for aerobic bacterial culture, the laboratory will process the specimen for the test based on the source listed on the request form. The client will not be telephoned to approve this change, but the change will be indicated on the report.

Footnotes

1. Stamm WE, Hooton TM, Johnson JR, et al. Urinary tract infections: From pathogenesis to treatment. J Infect Dis. 1989 Mar; 159(3):400-406 (review). 2644378
2. Andriole VT. Urinary tract infections in the 90s: Pathogenesis and management. Infection. 1992; 20(Suppl 4):S251-S256. 1294512
3. Nicolle LE. Urinary tract infection in the elderly: How to treat and when? Infection. 1992; 20(Suppl 4):S261-S265. 1294514

References

Cavagnolo R. Evaluation of incubation times for urine cultures. J Clin Microbiol. 1995 Jul; 33(7):1954-1956. 7665682
Clarridge JE, Pezzlo MT, Vosti KL. Laboratory diagnosis of urinary tract infections. In: Weissfeld AS, ed. Cumitech 2. Washington, DC: ASM Press; March 1987.
Joho KL, Soliman H, Weinstein MP. Comparison of one-day versus two-day incubation of urine cultures. Diagn Microbiol Infect Dis. 1995 Jan; 21(1):55-56. 7789098
Ronald AR, Nicolle LE, Harding GKM. Standards of therapy for urinary tract infections in adults. Infection. 1992; 20(Suppl 3):S164-S170. 1490743
Stamm WE. Criteria for the diagnosis of urinary tract infection and for the assessment of therapeutic effectiveness. Infection. 1992; 20(Suppl 3):S151-S159. 1490740

LOINC® Map

Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
008847 Urine Culture, Routine 630-4 008847 Urine Culture, Routine 630-4
Reflex Table for Urine Culture, Routine
Order Code Order Name Result Code Result Name UofM Result LOINC
Reflex 1 997870 Result 997131 Result 1 630-4
Reflex Table for Urine Culture, Routine
Order Code Order Name Result Code Result Name UofM Result LOINC
Reflex 1 997870 Result 997132 Result 2 630-4
Reflex Table for Urine Culture, Routine
Order Code Order Name Result Code Result Name UofM Result LOINC
Reflex 1 997870 Result 997133 Result 3 630-4
Reflex Table for Urine Culture, Routine
Order Code Order Name Result Code Result Name UofM Result LOINC
Reflex 1 997870 Result 997134 Result 4 630-4
Reflex Table for Urine Culture, Routine
Order Code Order Name Result Code Result Name UofM Result LOINC
Reflex 1 997870 Result 997135 Antimicrobial Susceptibility 23658-8

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