ICMR changes testing protocol switches to Rapid Antigen technology

▴ icmr-switches-testing-procedure-authorizes-rapid-antigen-technology
ICMR adopts Rapid Antigen Tests over PCR tests for Coronavirus detection

Union Health Minister Harsh Vardhan said today that  ICMR has switched protocol and now testing for COVID-19 from today onwards would be as per the new Rapid Antigen methodology. "This technique will be faster and cheaper, 169 testing centers set up in the National Capital. Priority for the supply of kits will be given to Delhi," he added.

A rapid antigen test (RAT) is a rapid diagnostic test suitable for point-of-care testing that directly detects the presence or absence of an antigen. This distinguishes it from other medical tests that detect antibodies (antibody tests) or nucleic acid (nucleic acid tests), of either laboratory or point of care types.

Common examples of RATs or RADTs include:

Rapid strep tests (for streptococcal antigens)[1]
Rapid influenza diagnostic tests (RIDTs) (for influenza virus antigens)
Malaria antigen detection tests (for Plasmodium antigens)

Antigen tests and antibody tests are often immunoassays (IAs) of one kind or another, such as dipstick IAs or fluorescence immunoassays. While RAT is an immunochromatographic assay that gives visual results that can be seen with the naked eye. It is considered to be qualitative but a person experienced in RDT testing can easily quantify the results. Being a screening test, the results should be evaluated on the basis of confirmatory tests like PCR testing or western blot.

One inherent advantage of an antigen test over an antibody test (such as antibody-detecting rapid HIV tests) is that it can take time for the immune system to develop antibodies after an infection begins, but the foreign antigen is present right away. Although any diagnostic test may have false negatives, this latency period can open an especially wide avenue for false negatives in antibody tests, although the particulars depend on which disease and which test are involved.

Recently FDA also invokes EUA to legitimise  Rapid Antigen Test, for COVID-19 detection. According to the FDA , each category of the diagnostic test has its own unique role in the fight against this virus. PCR tests can be incredibly accurate, but running the tests and analyzing the results can take time. One of the main advantages of an antigen test is the speed of the test, which can provide results in minutes. However, antigen tests may not detect all active infections, as they do not work the same way as a PCR test. Antigen tests are very specific for the virus but are not as sensitive as molecular PCR tests. This means that positive results from antigen tests are highly accurate, but there is a higher chance of false negatives, so negative results do not rule out infection. With this in mind, negative results from an antigen test may need to be confirmed with a PCR test prior to making treatment decisions or to prevent the possible spread of the virus due to a false negative.

Antigen tests are also important in the overall response against COVID-19 as they can generally be produced at a lower cost than PCR tests and once multiple manufacturers enter the market, can potentially scale to test millions of Americans per day due to their simpler design, helping our country better identify infection rates closer to real-time.

This is just the first antigen test to be authorized and we could expect more to follow. 

Tags : #ICMR #RapidAntigenTechnology #PCRTest #CovidTesting #FDA #HealthMinistry #HarshVardhan

About the Author

Team Medicircle

Related Stories

Loading Please wait...


Trending Now

Serum Institute of India Partners with Oxford University to Develop Meningitis-B VaccineApril 18, 2024
Ethical Concerns Arise: Nestlé Accused of Adding Sugar and Honey to Infant Formula and Breakfast Cereals in Low-Income CountriesApril 18, 2024
Empowering India's Youth: IG Drones & AASSC Launch Drone Skill Program, to Upskill 10M YouthApril 17, 2024
Autonomix Medical Inc. Covered in Benzinga Article Highlighting Innovative Nerve Treatment TechnologyApril 17, 2024
Top 5 online learning platform for learnersApril 17, 2024
Broad-Spectrum RNA Vaccine Breakthrough for Enhanced Virus ProtectionApril 17, 2024
The Impact of Excessive Internet Usage on School Absence: Finnish Study Reveals Key FindingsApril 17, 2024
Uncovering Delhi's Illegal Fertility Centre Operations: Insights from Recent Child Trafficking CasesApril 17, 2024
CarDekho's CSR Arm Girnar Foundation Hosts Health Check-up Camps for Underprivileged Children in Jaipur and GurugramApril 16, 2024
Atal Incubation Centre – Centre for Cellular and Molecular Biology (AIC-CCMB) signs agreement for placement of equipment with Thermo Fisher Scientific to help advance innovation in India April 16, 2024
AVEKSHA, four-day care centres, for the kids of industrial workers inauguratedApril 16, 2024
Nearly a third of the constituencies have zero women candidates in Phase 1 and 2 of LS Elections; reveals The Quantum Hub’s Factsheet April 16, 2024
Emergency Healthcare Provider Medulance Secures $3 Million Series A Funding Led by Alkemi Growth CapitalApril 16, 2024
The Healing Power of Natural Diversity: How Nature Boosts Mental HealthApril 16, 2024
Unveiling Cellular Recycling: How Nutrient-Starved Cells Adapt to Stressful ConditionsApril 16, 2024
Advancing Cancer Care: AIIMS Bhopal’s Workshop on Biomarker Interpretation in Breast CancerApril 15, 2024
10 Powerful Benefits to Diversify Healthcare Advertising ChannelsApril 15, 2024
Understanding Hospital Sink Contamination: Challenges in Fighting Multidrug-Resistant BacteriaApril 15, 2024
Rajasthan’s Swine Flu Situation: Health Department Observes DeclineApril 15, 2024
Is Your Doctor’s Prescription Incomplete ? Insights from Recent ICMR Study Suggests So!April 13, 2024