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Respiratory Pathogen Detection by Nucleic Acid Amplification (Lower Respiratory Specimen)

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

This test checks for viruses, bacteria, or other microbes in your lower respiratory tract (like your lungs or airways) using a probe to detect genetic material. It helps identify infections that may require treatment.

Quick summary

["Quickly identifies possible infections in your lungs or airways with high accuracy."]

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

Key facts at a glance

LOINC
94374-6
Short code
K pnm DNA Lower resp Ql NAA+probe
Synonyms
K pnm DNA Lower resp 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

How the Test Works

A sample of your respiratory secretions (such as sputum or induced sputum) is collected and analyzed using a specialized probe that targets genetic material from potential pathogens. This method detects DNA or RNA from viruses, bacteria, or other microbes without needing to grow them in a lab first.

What to Expect Before the Test

You may be asked to cough deeply into a sterile container or undergo a procedure to collect mucus from your airways. If you have a chronic condition (like COPD or asthma), your provider may guide you on how to prepare or collect the sample safely.

Common Uses of This Test

This test is often used to diagnose infections in people with symptoms like coughing, fever, or difficulty breathing. It’s particularly useful for identifying infections in the lungs or airways that might not be caught by other tests.

Possible Results and Next Steps

If the test finds genetic material from a pathogen, it suggests an infection may be present. Your healthcare provider will discuss the results with you and may recommend further testing or treatment based on the type of pathogen detected.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Nucleic Acid Probe Test for Lower Respiratory Infections

Frequently asked questions

Why might my doctor order this test?
Your doctor may order this test if you have symptoms of a lower respiratory infection, such as persistent coughing, chest pain, or difficulty breathing. It helps quickly identify the cause of your symptoms, which can guide treatment decisions, such as antibiotics for bacterial infections or antiviral medications for viral infections.
What does a positive result mean?
A positive result means that genetic material from a pathogen was detected in your sample. This does not always mean you are currently infected, especially if you have been exposed recently. Your doctor will interpret the result in the context of your symptoms and medical history to determine the next steps.
Can this test detect all types of infections?
This test detects a wide range of pathogens, including viruses (like influenza or RSV) and bacteria (like Mycoplasma pneumoniae or Legionella). However, it may not detect all possible infections, especially those caused by fungi or parasites. Always discuss your symptoms and test results with your healthcare 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