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Fungal culture with chromogenic agar (qualitative)

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

This test helps identify and confirm the presence of fungal organisms in your sample, such as blood, urine, or other body fluids.

Quick summary

It supports diagnosis of fungal infections by growing and detecting specific fungal colonies on special agar plates.

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

Key facts at a glance

LOINC
97946-8
Short code
Fungal w Chrom Agar Islt Cult-Color
Synonyms
Fungal w Chrom Agar Islt Cult-Color
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

What This Test Measures

The test involves collecting a sample (e.g., blood, urine, or other bodily fluids) and growing it on a specialized agar medium that supports fungal growth. Chromogenic agar changes color when certain fungi are present, making them easier to identify under a microscope or after incubation.

How the Test Works

After your sample is placed on the agar, it is incubated under controlled conditions for several days. Fungal colonies will appear as distinct growth patterns, often with a characteristic color change. This helps healthcare providers identify the type of fungus present.

Why It’s Done

This test is typically used to diagnose fungal infections, such as candidiasis (yeast infections), cryptococcosis, or other systemic fungal diseases. It is especially useful for patients with weakened immune systems, those with prolonged antibiotic use, or those showing symptoms like fever, persistent infections, or unexplained skin changes.

Sample Collection and Preparation

Your sample will be collected by a healthcare provider, depending on the suspected infection site. For example, blood cultures may be drawn, urine may be collected, or swabs may be taken from affected areas. The sample is then processed and placed on the chromogenic agar for incubation.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

A positive fungal culture confirms the presence of a fungal infection, guiding treatment decisions such as antifungal medications. The type of fungus identified helps determine the most effective therapy. Negative results mean no fungal growth was detected in the sample, but further testing may still be needed if symptoms persist.

Short name

Fungal Culture (Screening)

Frequently asked questions

How long will I need to wait for results?
Results typically take 3 to 7 days or longer, depending on the growth patterns of the fungus. Your healthcare provider will discuss the findings with you once they are available.
What does a positive result mean?
A positive result indicates the presence of a fungal organism in your sample. This can confirm a fungal infection and help your doctor choose the right treatment, such as antifungal medications.
Can I take anything to prepare for this test?
No special preparation is usually needed. However, follow your healthcare provider’s instructions if you have a specific type of sample (e.g., blood, urine) being tested.
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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