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Fungal Infection Detection by Qualitative PCR Probe on Specified Regions of DNA

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

This test checks for the presence of fungal DNA in your body using a polymerase chain reaction (PCR) method. It helps identify infections caused by fungi, which can affect various parts of the body.

Quick summary

["A simple test to detect fungal DNA, useful for diagnosing infections that may not show up with other tests."]

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

Key facts at a glance

LOINC
91090-1
Short code
Fungal ITS region Spec Ql NAA+probe
Synonyms
Fungal ITS region Spec Ql NAA+probe
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-amp-tar
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

This test checks a sample from your body for evidence of a fungal infection. It helps determine whether fungi—the organisms responsible for conditions such as athlete's foot, ringworm, or more serious internal infections—are present, and it can often identify the specific type so your healthcare provider can select the most effective antifungal treatment for you.

The test analyzes specific regions of fungal DNA found in your sample. By detecting these genetic markers, it can confirm whether fungi are present in your system. This method is highly sensitive and can identify fungi even in small amounts.

In the laboratory, your sample is examined under a microscope, treated with special stains, or placed in conditions that encourage any fungi present to grow. Laboratory professionals look for features that show whether fungus is present and, when possible, which type it is. A report describing the findings is then sent to your healthcare provider, who will explain what the results mean for your care.

PCR technology amplifies tiny amounts of fungal DNA from your sample. The test uses a probe to detect the presence of fungal genetic material, providing a qualitative result—meaning it tells you if fungi are present but not the type or amount.

Your healthcare provider may order this test if you have symptoms that could be caused by a fungal infection, such as a persistent rash, nail changes, cough, or fever that has not improved with standard treatment. It may also be used if you have a weakened immune system, to confirm a suspected diagnosis, or to monitor how well antifungal treatment is working.

Your healthcare provider may recommend this test if you have symptoms like persistent infections, unusual skin rashes, or signs of systemic fungal infections. It’s also used in monitoring patients with weakened immune systems or those at higher risk for fungal infections.

The type of sample depends on where the suspected infection is located and may include a skin scraping, nail clipping, swab, blood, or another body fluid collected by your healthcare provider. No special preparation is usually required, but follow any instructions you are given, and tell the staff about all medications you take, especially antibiotics or antifungal drugs, since these can affect results.

The sample for this test is collected based on your clinical needs—it could be a blood sample, fluid, or other body substance. The lab processes the sample to extract DNA, which is then analyzed for fungal markers.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Fungal PCR Qualitative Test

Frequently asked questions

This test helps confirm fungal infections that may not be visible through other diagnostic methods, such as cultures or imaging. Early detection is crucial for guiding treatment, especially in cases where antifungal medications are needed to prevent complications.
Most results are ready within a few days, but some methods, such as fungal cultures, can take one to several weeks because fungi often grow slowly in the laboratory. Your healthcare provider's office will contact you when the results are available, and you can ask about the expected timing when your sample is collected.
Results from this test are typically available within 24 to 48 hours, depending on lab processing times. Your healthcare provider will discuss the results with you during your follow-up visit.
No single test can detect every type of fungal infection. This test is designed to identify the fungi most commonly linked to your symptoms and the type of sample collected. If the result is negative but your provider still suspects a fungal infection, additional testing with different samples or methods may be recommended to look further.
No, this test detects fungal DNA in general but does not specify the type of fungus. For a precise identification, additional testing or cultures may be required.
Sample collection for this test is usually painless and minimally invasive. The discomfort depends on the type of sample collected (e.g., blood draw may cause slight discomfort, while other samples may involve minimal or no discomfort). Always follow your healthcare provider’s instructions for preparation.
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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