Antigen Testing

Testing performed on swabbed nasal samples to detect the antigens that are found on or within the virus.

Anatomy of the COVID-19 Virus

PCR vs Antibodies vs Antigen Testing for COVID-19

PCR Test

This test uses a swab from the nose or throat to extract the viral material from a person. This test is done to diagnose currently infected personnel as it requires the presence of viral material. The test uses technology called PCR (polymerase chain reaction) which amplifies the viral load if present in order to detect the genetic material of coronavirus. When a person is actively infected the material is detectable.

Antibodies Test

This test is a blood test and is used to determine the presence of antibodies of coronavirus, which is only present if people have been previously infected and not currently infected. Your body produces antibodies to fight infectious material such as COVID-19. It generally takes a couple days to a week for your body to produce these antibodies and it is unclear as to how long the human body retains antibodies for the coronavirus.

Antigen Test

This test like the PCR also uses a swab taken from either the nose or throat. It tests the presence of the virus proteins, not the genetic material. This is the same technique used to test for rapid strep testing and therefore tells a person if they are currently infected with COVID-19.

The SD Biosensor Test System

The SD Biosensor test is simpler and easier to use than the ABBOTT system because it does not require a ID NOW device.  It can be administered by healthcare professionals but if necessary, can be self-administered in the safety and comfort of one’s workplace or home.

What Is the Rapid Antigen Detection Test for COVID-19?

It is a test on swabbed nasal samples that detects antigens (foreign substances that induce an immune response in the body) found on or within the virus. Each box has 25 test kits. Each kit comes with a with an inbuilt COVID antigen test cartridge device, viral extraction tube with viral lysis buffer and sterile swab for sample collection.

Case Scenarios for Rapid COVID-19 Antigen Tests

You may want to see if you are carrying the virus for peace of mind:

1) Recent contact/exposure with a confirmed positive test individual and/or a close contact

2) Symptoms consistent with the flu or COVID-19 and not certain which it is

3) Return from airplane travel and presently in quarantine

4) Prior to visiting ‘at risk’ person in hospital, nursing home, new baby, pre-existing condition individual’s home (diabetes, autoimmune weakness, respiratory condition, cancer)

5) Monitoring higher risk people for home or workplace safety such as essential workers, health care providers

6) Group pre-screening prior to small group in person meetings

Process

Step 1

Collecting of specimen

from patient’s nasopharynx
(both nostrils)

Step 2

Mix the specimen

with extraction buffer
.

Step 3

Apply the specimen

get result within 30 minutes
.

INSTRUCTIONS SHEET (PDF)

HOW TO VIDEO

To view video, please contact supplier.

Interpretation of Test Results

Positive

Negative

“C” Control Line
“T” Test Line
.

Invalid

Performance Characteristics

Sensitivity

Clinical Evaluation
Sensitivity – 84.38%.

Specificity

Clinical Evaluation
Specificity – 100%.

All Negative Tests:
To improve the sensitivity of the test, repeat the test again after 24-48 hours of the first negative test if you are concerned or in quarantine.

All Positive Tests:
They are likely positive as the specificity is listed as 100%.

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