Bacterial Vaginosis (Sialidase) and Vaginal Yeast Culture

CPT: 87102; 87905
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Test Details


  • BV (Sialidase) and Vaginal Yeast (Culture)


BV (sialidase) activity: Enzyme activity test for use in the detection of vaginal fluid specimens for sialidase activity, an enzyme produced by bacteria associated with bacterial vaginitis, including Bacteroides spp, Prevotella spp, and Mobiluncus spp, and some G vaginalis. In a recent study, Bradshaw et al demonstrated the test to be 88% sensitive and 95% specific. Vaginal yeast culture: Detect yeast in vaginal fluid.


BV (sialidase) activity: Collecting specimens from the cervix should be avoided because (a) it might increase the risk to OB patients, and (b) cervical sialidase activity is usually higher than vaginal sialidase activity. Do not collect specimens from patients who have (a) used a vaginal cream or ointment product, (b) douched, or (c) used spermicides, vaginal lubricants, or feminine sprays within 72 hours of testing. If insufficient sample is collected or collected from a patient undergoing antimicrobial therapy, the test may give a false-negative result.


BV (sialidase) activity: chromogenic enzyme activity test; vaginal yeast culture: culture

Specimen Requirements


Vaginal fluid




Copan double swab in Amies liquid medium


Using transport swabs provided, collect vaginal fluid sample by contacting the lower one-third of the vaginal wall, rotating for 10 to 20 seconds to absorb fluid. Immediately place the swabs into the transport tubes.

Storage Instructions

Maintain specimen at room temperature for up to 48 hours.

Causes for Rejection

Specimen collected or transport other than previously described

Clinical Information


Bradshaw CS, Morton AN, Garland SM, Horvath LB, Kuzevska I, Fairley CK. Evaluation of a point-of-care test, BVBlue, and clinical laboratory criteria for diagnosis of bacterial vaginosis. J Clin Microbiol. 2005 Mar; 43(3):1304-1308. 15750100


Order Code Order Code Name Order Loinc Result Code Result Code Name UofM Result LOINC
182709 BV+Yeast Culture 180036 BV, Sialidase Activity 41477-1
182709 BV+Yeast Culture 182495 Vaginal Yeast Culture 18483-8

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