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Body Fluid DNA Probe for Pathogen Detection (e.g., *Mycobacterium tuberculosis*)

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

This test analyzes DNA extracted from your body fluids to detect specific genetic material from certain bacteria or viruses, such as tuberculosis. It helps identify infections that may not be visible through standard cultures.

Quick summary

["This test can help diagnose infections early and guide treatment decisions by detecting genetic material in your body fluids."]

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

Key facts at a glance

LOINC
76606-3
Short code
P aerug regA # XXX.body fld NAA+probe
Synonyms
P aerug regA # XXX.body fld 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

What This Test Measures

The test uses a specialized probe to identify unique genetic sequences from specific pathogens (e.g., bacteria like *Mycobacterium tuberculosis*). These sequences are found in your body fluids, such as blood, sputum, or other samples, and are compared against known pathogen DNA patterns.

How the Test Works

DNA is extracted from your sample, and the probe binds to matching genetic sequences if the pathogen is present. This binding is detected and analyzed to confirm or rule out infection.

When This Test Might Be Used

Your healthcare provider may order this test if you have symptoms of tuberculosis (e.g., persistent cough, fever) or other suspected infections where standard cultures are inconclusive.

Sample Collection and Preparation

A small sample of your body fluid (e.g., sputum, blood, or other fluid) is collected and sent to the lab. The DNA is isolated, and the probe is applied to detect specific genetic markers.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test provides a faster and more sensitive way to detect infections that may not grow in standard culture labs. It can help confirm or exclude tuberculosis and other pathogens early, allowing for timely treatment and reducing spread.

Short name

Body Fluid DNA Probe

Frequently asked questions

Why might my healthcare provider recommend this test?
Your provider may suggest this test if you have symptoms of an infection, such as persistent coughs, fever, or other signs of illness, especially if standard tests are unclear or negative.
What does a positive result mean?
A positive result means the test detected genetic material from a specific pathogen in your sample, suggesting an active infection. Your provider will discuss next steps, such as starting treatment.
How long does it take to get results?
Results are typically available within a few days, depending on lab processing times. Your provider will contact you with the outcome.
  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