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Urine Culture, Prenatal, With Group B Streptococcus Susceptibility Reflex
CPT:
87086
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 test request form. The client will not be telephoned to approve this change, but the change will be indicated on the report.
Expected Turnaround Time
2 - 4 days
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Related Information
Related Documents
Specimen Requirements
Specimen
Urine
Volume
To fill line on Vacutainer® gray-top urine culture transport tube
Collection
Storage Instructions
Maintain specimen at room temperature.
Patient Preparation
Causes for Rejection
Unrefrigerated, unpreserved specimen older than two hours may be subject 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 >36 hours for urine); specimen collected via Foley catheter
Test Details
Use
Evaluation of pregnant women for asymptomatic bacteriuria has been recommended.1
Methodology
Culture
Additional Information
A single culture is about 80% accurate in the female; two containing the same organism with count of 105 or more represents 95% chance of true bacteriuria; three such specimens mean virtual certainty of true bacteriuria.2 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. 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 to two the number of organisms that will be identified when recovered from urine. 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.
Footnotes
1. Verani JR, McGee L, Schrag SJ, et al. Prevention of perinatal group B streptococcal disease—revised guidelines from CDC, 2010. MMWR. 2010 Nov 19; 59(RR-10):1-32. 21088663
2. 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
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 2A. Washington, DC: American Society for Microbiology; 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 GK. Standards of therapy for urinary tract infections in adults. Infection. 1992; 20(Suppl 3):S164-S170,S175-180. 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 |
|---|---|---|---|---|---|---|
| 008851 | Urine Culture,Prenatal, w/GBS | 630-4 | 008851 | Urine Culture,Prenatal, w/GBS | 630-4 |
| Reflex Table for Urine Culture,Prenatal, w/GBS | ||||||
|---|---|---|---|---|---|---|
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
| Reflex 1 | 008852 | Result | 997877 | Result 1 | 630-4 | |
| Reflex Table for Urine Culture,Prenatal, w/GBS | ||||||
|---|---|---|---|---|---|---|
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
| Reflex 1 | 008852 | Result | 997879 | Result 2 | 630-4 | |
| Reflex Table for Urine Culture,Prenatal, w/GBS | ||||||
|---|---|---|---|---|---|---|
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
| Reflex 1 | 008852 | Result | 997881 | Result 3 | 630-4 | |
| Reflex Table for Urine Culture,Prenatal, w/GBS | ||||||
|---|---|---|---|---|---|---|
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
| Reflex 1 | 008852 | Result | 997883 | Result 4 | 630-4 | |
| Reflex Table for Urine Culture,Prenatal, w/GBS | ||||||
|---|---|---|---|---|---|---|
| Order Code | Order Name | Result Code | Result Name | UofM | Result LOINC | |
| Reflex 1 | 008852 | Result | 997885 | Antimicrobial Susceptibility | 23658-8 | |
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