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Fungal Culture of Hair

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

This test checks for fungal infections (such as ringworm or other dermatophyte infections) by growing hair samples in a lab to identify any fungal growth.

Quick summary

["A hair fungal culture helps diagnose skin or scalp infections caused by fungi."]

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

Key facts at a glance

LOINC
571-0
Short code
Fungus Hair Cult
Synonyms
Fungus Hair Cult
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
culture
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 Is This Test Done?

Your healthcare provider may order this test if you have symptoms like persistent itching, redness, flaking, or visible sores on your scalp, nails, or skin. It’s also used to confirm infections in people with weakened immune systems or those who’ve had repeated fungal infections.

What Does the Test Involve?

A small sample of hair is collected (usually from the scalp or nails) and sent to a lab. The hair is placed in a special medium to grow any fungi present over several days to weeks. Results help determine if a fungal infection is present and, if so, which type of fungus it is.

What Are Common Findings?

Positive results show fungal growth (e.g., *Trichophyton*, *Microsporum*, or *Epidermophyton* species), confirming a fungal infection. Negative results mean no fungi were detected in the sample.

How Is the Test Performed?

No special preparation is needed. A healthcare provider will clip a small section of hair (about 1–2 inches) and send it to the lab. The lab then cultures the hair under sterile conditions to detect fungal growth.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: This test is crucial for diagnosing fungal infections of the skin, scalp, or nails. Accurate identification helps guide treatment (e.g., antifungal medications) and prevents spread to others. Misdiagnosis could lead to unnecessary treatments or delayed care.

Short name

Hair Fungal Culture

Frequently asked questions

How long does it take to get results?
Results typically take 5–14 days, depending on lab processing time. Some labs may provide preliminary screening results sooner, but final confirmation requires incubation.
What if I have symptoms but the test is negative?
A negative result doesn’t always mean you don’t have a fungal infection. Other causes (like bacterial infections, psoriasis, or eczema) could mimic symptoms. Your provider may recommend retesting, a different test (e.g., skin scraping), or additional evaluation.
Can I shower or use hair products before the test?
Yes, you can shower or use hair products normally. Avoid applying oils, creams, or medications directly to the hair sample area unless instructed by 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