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Vaginal Lactobacilli Count (Qualitative, Microbial Culture)

Published: August 9, 2026Updated: August 16, 2026

This test checks for the presence of beneficial bacteria (lactobacilli) in your vaginal area, often used to assess vaginal health and balance of microbes.

Quick summary

["Lactobacilli help maintain a healthy vaginal environment by supporting natural defenses against harmful bacteria."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
90303-9
Short code
T vaginalis Cvx Ql Micro
Synonyms
T vaginalis Cvx Ql Micro
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
microscopy-light
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

The test involves collecting a sample from your vagina and examining it under a microscope or through culture to identify lactobacilli. This helps determine if your vaginal microbiome is balanced or if there may be an imbalance that could affect your health.

Why It Matters

Lactobacilli are key to preventing infections like bacterial vaginosis and maintaining a healthy pH level in the vagina. An abnormal count may indicate conditions requiring further evaluation.

Common Reasons for Testing

Doctors may order this test if you have symptoms like unusual discharge, odor, or itching, or if you’re at risk for infections. It’s also part of routine care for some patients with recurrent vaginal issues.

What to Expect Before the Test

No special preparation is needed, but avoid douching or using vaginal products 24 hours before the test. Wear comfortable clothing and let your healthcare provider know if you’re pregnant or have any allergies.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Vaginal Lactobacillus Culture

Frequently asked questions

How does a low or high count of lactobacilli affect my health?
A low count may suggest an imbalance (dysbiosis) that could increase risk for infections like bacterial vaginosis or yeast infections. A high count might indicate overgrowth of other bacteria or conditions like trichomoniasis. Your doctor will discuss results in context with your symptoms and medical history.
What if my results are abnormal?
If results show an imbalance, your doctor may recommend treatments like probiotics, antibiotics, or antifungal medications to restore balance. Follow-up tests may be needed to monitor progress.
Is this test covered by insurance?
Most insurance plans cover this test if ordered by a healthcare provider for diagnosis or management of a vaginal health concern. Check with your insurance provider for specific details, as coverage may vary.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy