The Rapid Antigen Test is a diagnostic test that detects the presence of specific antigens in the body, usually related to infections such as COVID-19, influenza, and strep throat. The test is designed to quickly identify infections by detecting protein markers present in the pathogen, providing results in 15-30 minutes.
Indications for Rapid Antigen Test:
● COVID-19 screening: Widely used for the rapid detection of the SARS-CoV-2 virus in symptomatic individuals.
● Flu and viral infections: Used to diagnose influenza, respiratory syncytial virus (RSV), and other viral infections.
● Strep throat diagnosis: It is commonly used to detect group A streptococcus in throat swabs.
How Rapid Antigen Test Works:
● A sample, typically from a nasal swab or throat swab, is placed on a test device that contains special reagents. If the antigen is present, the test produces a visible signal, usually in the form of a line or color change, within 15-30 minutes.
Normal Range:
● Negative result: No presence of the targeted antigen in the sample.
● Positive result: Presence of the targeted antigen, confirming the presence of infection.
Abnormal Test Significance:
● Positive result: Indicates the presence of the pathogen. If the test is used for COVID-19 or flu, it confirms active infection and treatment or isolation measures should be taken.
● Negative result: A negative result does not necessarily rule out infection. A PCR test or further testing may be required for confirmation, particularly for COVID-19.
Management Based on Results:
● For positive results: Initiate appropriate antiviral treatments or antibiotics depending on the infection (e.g., oseltamivir for flu).
● For negative results: If symptoms persist or risk of infection is high, follow up with PCR testing or other diagnostic tests.
Price in India:
Approx. ₹200 – ₹1,000 for a rapid antigen test, depending on the infection being tested.
Frequently Asked Questions
How accurate are rapid antigen tests?
Rapid antigen tests are generally less sensitive than PCR tests, which may result in false negatives.
When should I take a rapid antigen test?
It is ideal for screening symptomatic individuals or as a quick diagnostic tool when time is a factor.
Disclaimer: Rapid antigen tests should be used as a screening tool and confirmed with more accurate tests, especially if symptoms persist or exposure is high.
How HealthPil Can Help:
HealthPil provides access to infectious disease specialists who can help interpret your rapid antigen test results and recommend further diagnostic steps or treatments.