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Vaginal infection: not a classic STI, but strongly associated with sexual activity Curable

Bacterial Vaginosis Testing

Bacterial vaginosis (BV) is the most common vaginal infection in people aged 15–44, affecting an estimated 21 million U.S. women a year, and about 84% have no symptoms. When it shows, the tells are a thin gray-white discharge and a fishy odor that sharpens after sex. A short antibiotic course clears it. But BV mimics yeast infection, trichomoniasis, and early STIs, so a clinical test, not self-diagnosis, is the only reliable path to the right treatment.

Find bacterial vaginosis testing near you When can bacterial vaginosis be detected?

Understanding bacterial vaginosis

Testing for bacterial vaginosis, in brief

Bacterial Vaginosis is usually symptomless and quick to cure, so testing is the only reliable way to know you have it. This page covers how bacterial vaginosis testing works, what it costs, and where to get tested near you.

Full bacterial vaginosis overview: symptoms, complications & treatment

Where to get tested

Find bacterial vaginosis testing near you

Choose your test and enter your city: we'll take you straight to local bacterial vaginosis testing: nearby clinics and labs, prices, hours.

Test from home

At-home STD testing in the U.S.

if you'd rather skip the trip, an at-home kit ships to the U.S., you collect the sample privately, and mail it back to a CLIA-certified lab. Results come online in days, with a clinician available if anything is positive. Same labs as a clinic, no waiting room, and you can read how accurate at-home STD tests are before you order.

Want a free option first? The CDC-supported TakeMeHome program mails free at-home HIV self-test kits, and, in many areas, free STI kits, to your door, with no insurance or payment needed. The paid kits below add broader panels and faster turnaround.

  • In-home collection

    Quest Diagnostics

    Quest Diagnostics

    $79 & up

    Panel:
    8-infection panel incl. chlamydia, gonorrhea, HIV, syphilis, hepatitis & herpes: single tests too
    Sample:
    Quest Mobile: a phlebotomist collects your sample at home
    Results:
    1–3 days, online: physician-reviewed
    • In-home sample collection
    • Nationwide Quest lab network
    • Physician-reviewed results
    • FSA/HSA eligible
    Order online Quest Diagnostics review

  • Best range: couples & full panels

    myLAB Box

    myLAB Box

    $79 & up

    Panel:
    Up to 14 infections, incl. HIV, syphilis, chlamydia, gonorrhea, hepatitis & herpes
    Sample:
    Self-collect: swab, urine, finger-prick
    Results:
    2–5 days, online
    • Free phone consult if positive
    • CLIA-certified labs
    • Couples & subscription options
    • Discreet packaging
    Order online myLAB Box review

  • Best for simplicity & support

    LetsGetChecked

    LetsGetChecked

    $89 & up

    Panel:
    5–6 common STIs incl. chlamydia, gonorrhea, HIV, syphilis & trichomoniasis
    Sample:
    Finger-prick + urine/swab
    Results:
    2–5 days, online
    • 24/7 nurse support
    • Prescription for positives
    • CLIA-certified labs
    • Free shipping both ways
    Order online LetsGetChecked review

Every kit uses CLIA-certified labs. At-home testing is for screening; a reactive result should be confirmed and treated by a clinician. Prices and panels shown are illustrative and change often, confirm current details on the provider's site.

Symptoms

Do you need a bacterial vaginosis test?

Approximately 84% of people with bacterial vaginosis have no symptoms at all: the infection is discovered incidentally during a routine pelvic exam, STI panel, or prenatal screening, or is not discovered at all. Many people with BV are unaware they have it for months or years. That's exactly why testing matters: about 84% of people with BV have no symptoms and may not know they have it.

See every bacterial vaginosis symptom — in women, men, rectal & throat

How testing works

How a bacterial vaginosis test works

Testing for bacterial vaginosis is simple and painless — you pee in a cup or do a quick swab, and a lab checks the sample for the infection. Below: your options, what each costs, and how soon you can test after a possible exposure.

When to test

Test when symptoms appear: thin gray discharge, fishy odor, or vaginal discomfort. Because BV, yeast, and trichomoniasis look similar, a clinician evaluation or at-home vaginal NAAT panel is recommended rather than self-treatment. A same-visit result is available from in-office wet-mount using Amsel criteria; vaginal NAAT panels take 1–3 days and are highly sensitive.

After treatment

If you are asymptomatic but at elevated risk, pregnant, planning a gynecologic procedure, or concerned after a new partner, ask whether BV screening is appropriate. Most people with BV have no symptoms and are unaware; screening catches it before complications develop.

Clinical exam, Amsel criteria Most common
Sample
Pelvic exam plus vaginal swab
Results
Same visit (immediate)

The standard bedside diagnostic method. Four criteria assessed together: (1) Thin, homogeneous gray-white discharge. (2) Vaginal pH above 4.5 (tested with pH paper on the swab, immediate). (3) Positive whiff test: a fishy amine odor released when 10% potassium hydroxide is added to the vaginal sample. (4) Clue cells on saline wet-mount microscopy: vaginal epithelial cells so densely covered with bacteria that their borders appear indistinct (stippled). Three of four criteria positive confirms BV. Available wherever a microscope and pH paper are on hand, no lab send-out required.

Nugent score (Gram stain) Research reference standard
Sample
Vaginal swab sent to lab
Results
1–2 days

The research-standard method: a Gram-stained vaginal smear is scored 0–10 based on the proportion of Lactobacillus morphotypes (large Gram-positive rods) versus anaerobic morphotypes (small Gram-negative rods and curved rods). Scores 0–3 = normal flora; 4–6 = intermediate; 7–10 = BV. More reproducible and objective than Amsel criteria across different readers; used mainly in clinical research and STI specialty settings rather than routine primary care.

Molecular vaginal panel (NAAT) Most accurate
Sample
Vaginal swab, self- or clinician-collected
Results
1–3 days

A molecular panel (e.g., BD MAX Vaginal Panel, Hologic Aptima Bacterial Vaginosis assay, Myriad Foresight) detects BV-associated bacteria (including Gardnerella and the Lactobacillus depletion signature), yeast, and Trichomonas vaginalis from a single swab. Highest sensitivity and specificity of any available BV test; increasingly the standard at private labs and via at-home kits. Does not require a pelvic exam, self-collected swabs are validated for these assays.

At-home vaginal panel
Sample
Self-collected vaginal swab mailed to a CLIA-certified lab
Results
2–5 days

Same validated NAAT technology as in-lab testing, collected at home without an appointment. A telehealth or lab-affiliated clinician contacts you if results are positive to prescribe treatment. Self-pay cost: ~$50–$99. Useful when clinic access is limited, when privacy is important, or when symptoms do not clearly distinguish BV from other conditions.

OTC pH self-test
Sample
Self-collected vaginal swab at home
Results
Immediate

Over-the-counter pH strips or combination pH/whiff tests (e.g., Vagisil Screening Kit) can suggest BV when vaginal pH is above 4.5. These are not diagnostic, a positive result should prompt a clinic visit or NAAT for confirmation before antibiotic treatment. False positives occur during menstruation (menstrual blood is alkaline) and immediately after intercourse (semen raises pH transiently). A negative pH result makes BV less likely but does not rule it out.

What a bacterial vaginosis test costs

Where What it costs
Private lab (self-pay)In-office Amsel wet-mount exam: ~$25–$80 self-pay; molecular vaginal NAAT panel at a private lab: ~$60–$120; at-home NAAT panel: ~$50–$99; metronidazole 500 mg × 14 tablets (generic): ~$4–$8 with a GoodRx coupon; vaginal metronidazole gel: ~$15–$30 generic; secnidazole 2 g single-dose packet: ~$30–$60
Free / sliding-scale clinicFree or very-low-cost at health departments, Title X family-planning clinics, federally qualified health centers (FQHCs), and Planned Parenthood locations, particularly for people without insurance
With insuranceCovered by most ACA-compliant plans when medically indicated; no-cost as part of prenatal care for symptomatic pregnant people; at-home NAAT panels may require a prescription for insurance coverage under some plans

Compare STD testing costs across every option.

Screening guidance

Who should get tested for bacterial vaginosis?

Testing for bacterial vaginosis is usually guided by symptoms, a known exposure, or a partner's diagnosis rather than routine screening: so you test when you have a reason to, not on a fixed schedule.

  1. 1

    Anyone with abnormal vaginal discharge or fishy odor

    Thin gray or white discharge and a fishy smell, especially noticeable after sex or during menstruation, are BV's signature symptoms. Because BV, yeast infections, and trichomoniasis produce overlapping symptoms but require completely different treatments (antibiotics for BV, antifungals for yeast, different antibiotics for trich), a clinical test is the only reliable way to distinguish them. Vaginal pH, wet-mount microscopy, or a molecular NAAT panel all provide rapid, definitive answers.

  2. 2

    Before certain gynecologic procedures

    Untreated BV before IUD insertion, endometrial biopsy, hysteroscopy, or elective abortion significantly increases the risk of post-procedure pelvic infection and ascending bacteria. Most clinicians routinely screen for and treat BV before these procedures. If you have an upcoming procedure, ask whether BV screening is included, a single vaginal swab is all that's needed.

  3. 3

    Pregnant people with any vaginal symptoms

    BV during pregnancy is associated with preterm birth, low birth weight, premature rupture of membranes, and postpartum endometritis. Symptomatic pregnant people should be evaluated and treated promptly. Some guidelines recommend screening high-risk pregnancies (history of preterm birth) even without symptoms. Both metronidazole (oral) and clindamycin (oral) are safe during pregnancy.

  4. 4

    People with recurrent vaginal symptoms or misdiagnosed 'yeast infections'

    If you have been treated for a presumed yeast infection more than once without clear resolution, recurrent BV may be the actual diagnosis. The two conditions look similar on self-assessment, but yeast itches intensely and produces thick white discharge; BV produces thin gray discharge with a characteristic odor. A molecular vaginal NAAT panel diagnoses both definitively in a single test, breaking the misdiagnosis cycle.

  5. 5

    When testing for STIs, BV and STIs can coexist

    Abnormal discharge can also be a sign of gonorrhea, chlamydia, or trichomoniasis. Many clinicians evaluate for BV and STIs together when a vaginal discharge complaint prompts a visit. A single vaginal NAAT panel can screen for BV, yeast, trichomoniasis, chlamydia, and gonorrhea simultaneously. Because BV raises susceptibility to all STIs by compromising the vaginal mucosal barrier, testing for both at once makes clinical sense.

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Living with bacterial vaginosis

Questions to ask your provider about bacterial vaginosis

Bacterial vaginosis is treatable and nothing to be ashamed of. The most useful next step after a positive result (or before a first test) is a direct conversation with a clinician. Here are the questions that matter most:

  • Is my bacterial vaginosis test result definitive, or do I need a confirmatory test?
  • What can I do to lower my chance of recurrence, which is common with BV?
  • Should I notify my recent partners, and can your office help me do that confidentially?
  • If BV keeps coming back, is longer suppressive therapy right for me?
  • Are there other STIs I should test for at the same visit?
  • Can this affect my fertility, pregnancy, or long-term health if left untreated?

Good to Know

Bacterial Vaginosis testing FAQs

Common questions about bacterial vaginosis and bacterial vaginosis testing, answered.

Can you test for BV at home?

Yes. At-home BV tests come in two forms: a vaginal pH strip that flags an abnormal pH within minutes, and a mail-in swab kit that a lab analyzes for the bacterial imbalance and returns results in a few days. A high pH suggests BV but cannot confirm it, so a lab swab is the more definitive option.

Are at-home BV tests accurate?

Mail-in lab swabs are quite accurate because a lab identifies the actual bacteria; simple pH strips are less reliable and only measure acidity, which can be raised by BV, trichomoniasis, or other causes. Whichever you use, confirm a positive result and any treatment with a clinician.

How much does a BV test cost?

Drugstore pH tests run a few dollars; mail-in lab kits that screen for BV, often alongside yeast and trichomoniasis, typically cost $50 or less, and many clinics test for free or bill insurance.

Should I see a doctor instead of testing at home?

See a clinician if it is your first episode, if symptoms keep coming back, if you are pregnant, or if you are not sure whether it is BV, a yeast infection, or an STI, since the treatments differ and BV needs prescription antibiotics.

Medically Reviewed · Updated

Reviewed by Dr. Grace Lin, MD, FACOG · OB-GYN

Obstetrician-gynecologist focused on reproductive and sexual health for women: pregnancy, BV, yeast, trichomoniasis and HPV/cervical screening. Our editorial guidelines →

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