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Vaginal Lactobacilli Count (Qualitative, Wet Mount Examination)

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

This test checks the presence and balance of healthy bacteria (lactobacilli) in your vaginal area, which helps maintain natural protection against infections.

Quick summary

["A healthy vaginal microbiome relies on specific bacteria; this test helps assess its balance."]

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

Key facts at a glance

LOINC
24112-5
Short code
Deprecated T vaginalis rRNA Genital Ql P
Synonyms
Deprecated T vaginalis rRNA Genital Ql P
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
probe
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

Why This Test Matters

Vaginal lactobacilli are key to preventing harmful bacteria and yeast overgrowth. A healthy count supports vaginal health and may help detect imbalances early.

What to Expect Before the Test

No special preparation is needed. A healthcare provider will collect a sample using a sterile swab during a pelvic exam or by collecting fluid from your vagina.

How the Results Are Interpreted

Results are qualitative (present or absent) rather than numeric. A normal sample typically shows high levels of lactobacilli, which appear as rod-shaped bacteria under a microscope.

Common Reasons for Testing

This test may be used to diagnose or monitor conditions like bacterial vaginosis, yeast infections, or other vaginal imbalances. It’s also sometimes checked during prenatal care to assess vaginal health.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Frequently asked questions

What does a low or high count of vaginal lactobacilli mean?
A low count may indicate an imbalance (dysbiosis) that could increase risk for infections, including bacterial vaginosis or sexually transmitted infections. A high count alone isn’t diagnostic but may warrant further evaluation.
How often should I get this test?
This test is typically ordered as needed, often during pregnancy, after treatment for infections, or if symptoms like unusual discharge or itching occur. Your healthcare provider will determine the best timing for you.
Can lifestyle changes affect my results?
Yes, factors like douching, certain medications, sexual activity, and hormonal changes can influence vaginal bacteria. Avoid douching 24 hours before testing and discuss any medications with your provider.
  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