Detection of Influenza A and B Virus (screening test)
1 day 
Available with home visit We remind you that independent interpretation of the results is unacceptable, the information provided below is for reference purposes only.
The detection of Influenza A and B viruses is a screening test used to identify infection with influenza viruses type A and B, the pathogens responsible for seasonal influenza.
The test detects specific viral components in a respiratory tract sample and may help differentiate influenza from other respiratory infections with similar clinical manifestations.
The test result is interpreted in conjunction with the patient's symptoms, medical history, and epidemiological data. In certain situations, depending on the clinical presentation, the physician may recommend confirmation using molecular testing methods.
Indications
- sudden onset of fever;
- chills;
- cough;
- sore throat;
- nasal congestion or runny nose;
- muscle and joint pain;
- headache;
- pronounced fatigue and weakness;
- clinical suspicion of influenza;
- recent contact with individuals with confirmed or suspected influenza;
- need to differentiate influenza from other respiratory infections, as recommended by a physician.
Procedure
For the test, a respiratory tract sample is collected according to the method used by the laboratory, usually with a special swab.
Sample collection takes only a short time and may cause temporary discomfort, tearing, or a sensation of local irritation.
The sample is subsequently analyzed for the detection of Influenza A and B viruses.
Limitations
A positive result indicates the detection of Influenza A or B virus in the tested sample and should be interpreted in the context of the patient's clinical presentation.
A negative result does not completely exclude influenza infection. The result may be affected by the timing of sample collection, the amount of virus present in the sample, the quality of sample collection, and the characteristics of the method used.
Screening tests may have lower sensitivity compared with molecular methods. If clinical suspicion of influenza persists, particularly in patients at increased risk of complications, the physician may recommend additional testing.
Sources:
https://en.wikipedia.org/wiki/Screening_(medicine)
https://www.webmd.com/health-insurance/screening-tests
hhttps://www.cdc.gov/flu/professionals/diagnosis/overview-testing-methods.htm
https://www.cdc.gov/flu/professionals/diagnosis/clinician_guidance_ridt.htm
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6018333/
IMPORTANT!
It is crucial to remember that the information provided in this section is not intended for self-diagnosis or self-treatment. If you experience any symptoms or a worsening of a condition, it is essential to consult a healthcare professional for proper diagnosis and treatment. Only a qualified specialist can accurately diagnose and determine the appropriate course of treatment. To ensure the most accurate and consistent evaluation of test results, it is recommended to have them performed at the same laboratory. Different laboratories may use varying methods and units of measurement for similar tests.
Preparation:
- no special general preparation is required;
- sample collection is recommended as close as possible to the onset of symptoms, when the amount of virus in the respiratory tract is generally higher;
- before sample collection, the patient should inform the medical staff about the recent use of sprays, drops, solutions, or other preparations applied locally to the nose or throat;
- if the sample is collected from the nose, extensive nasal hygiene should be avoided immediately before collection;
- if sample collection involves the oropharyngeal area, the laboratory's instructions regarding food and drink intake, oral hygiene, and the use of topical preparations before testing should be followed;
- prescribed treatment should not be discontinued without a physician's recommendation.
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