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Respiratory Pathogen Detection by Probe (Lower Respiratory Tract)

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

This test checks for bacteria or viruses that may cause infections in your lungs or airways, using a molecular probe on a sample from your lower respiratory tract.

Quick summary

["Helps identify infections that may require targeted treatment or further medical evaluation."]

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

Key facts at a glance

LOINC
94371-2
Short code
P aerugns DNA Lower resp Ql NAA+probe
Synonyms
P aerugns 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

What This Test Measures

The test detects genetic material from specific bacteria and viruses commonly linked to lower respiratory infections. It looks for pathogens such as respiratory viruses (e.g., influenza, RSV, adenovirus) and bacteria (e.g., *Streptococcus pneumoniae*, *Haemophilus influenzae*, *Mycoplasma pneumoniae*). This is done through a molecular probe that binds to unique genetic sequences in these organisms.

How the Sample Is Collected

A sample is collected from your lower respiratory tract, often via a nasal swab or bronchoalveolar lavage. The sample is then processed in the lab to analyze for the presence of these pathogens.

When You Might Need This Test

Your healthcare provider may recommend this test if you have symptoms like persistent cough, fever, shortness of breath, or worsening respiratory issues, especially if other tests (like a chest X-ray or bloodwork) suggest an infection.

What to Expect Before the Test

No special preparation is needed. You may be asked to avoid certain medications (like antibiotics) for a short time before testing, depending on your provider’s instructions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Lower Resp Probe

Frequently asked questions

Why did my doctor order this test?
Your doctor may have suspected a specific type of infection based on your symptoms, test results, or medical history. This test provides precise information about what might be causing your respiratory issues, helping to avoid unnecessary treatments or confirm the need for targeted therapy.
How long will it take to get results?
Results are typically available within 24 to 48 hours, depending on lab processing times. Your doctor will contact you once the results are ready.
Can I take antibiotics before getting this test?
It’s best to avoid antibiotics for at least 48 hours before testing, as they can affect the accuracy of the results. Always follow your doctor’s specific instructions.
  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