COVID-19 RAPID ANTIGEN TEST
1. How does our COVID-19 Antigen test work?
The COVID-19 rapid antigen test uses human nasopharyngeal swab specimens via rapid membrane based lateral ﬂow immunoassay technology to qualitatively detect SARS-CoV-2 antigens.
The test works by binding SARS-CoV-2 antigens to the nano-particulate antibodies coated in the test. The reactive complexes diﬀuse up the strips membrane using molecular chromatography.
When SARS-CoV-2 antigens are present, they will bind to the SARS-CoV-2 antibodies that are coated on the (T), test line region of the test. This will form a colored line, indicative of a POSITIVE result. A POSITIVE result will have 2 lines. The test line region, and the control line region.
When antigens are not present a colored line will not appear, leaving only the control line region colored. A NEGATIVE result will therefore only have one line. This control line should always be present, and indicates that all test components have functioned accurately.
2. Why use a rapid COVID-19 AG test?
COVID-19 rapid antigen tests are an inexpensive, speedy, and reliable way to screen persons at points of entry. They have a high sensitivity and speciﬁcity, and detect the presence of SARS-CoV-2 in infected individuals. Results are most accurate when correlated with clinical symptoms. That is; if a person presents with a fever, cough, loss of smell, or any other symptom relating to COVID-19, the likelihood of a POSITIVE result will be high if symptoms are caused by SARS-CoV-2.
These tests can also be utilized for contact tracing, by testing individuals that have been in close contact with the infected patient. Fast turnaround times and reliable tests will save countless hours in lost workforce.
CLICK HERE to see how Rapid Antigen Testing is being used in SA to combat the spread of COVID-19.
3. What are the unique services oﬀered by TESTMENOW ?
We oﬀer comprehensive solutions to ensure that tests are being used with maximum eﬃciency and eﬃcacy. From training non-medical personnel to accurately administer tests in areas were medical staﬀ may be scarce, to supplying highly a trained medical workforce to perform tests in large volumes.
TESTMENOW also oﬀers expert consultation and assistance in implementing correct protocols and procedures. These range from pre-test health questionnaires, contact tracing, to quarantine and Isolation procedures.
Our on call doctors oﬀer tele based support to your operation, and assist with any issues or questions that may come your way. Our doctors can help make decisions and recommendations based on unique situations in real time.
4. What is the diﬀerence between quarantine and isolation?
Quarantine is a term reserved for a non-infected individual who came into close contact with a positive patient. This person will remain adequately socially distanced from all people until they are ready to test. (Usually 5-7 days post exposure). Antigen tests oﬀer an excellent avenue for testing in these patients.
Isolation is a term reserved for a conﬁrmed SARS-CoV-2 POSITIVE patient. They will remain in an environment that is well ventilated and adequately distanced from other people for a time that is long enough to render them non-infective to others. These isolation times are ever changing with new scientiﬁc data and evidence. Our medical experts are privy to the latest data from the CDC and WHO, ensuring correct and up to date procedures and protocols.
5. What happens if a person tests positive but has already recovered from clinical illness?
SARS-CoV-2 antigen and PCR tests can detect virus even after a patient has recovered and has ceased to be contagious. TESTMENOW will oﬀer tailor made point of call guidelines via consultation with our experts to allow or disallow access to such a person. If such a person has a suﬃciently timed proof of a positive result or a positive antibody test, it would be possible to grant such a person access. If not it would be impossible to say if this person is pre-symptomatic and infectious, or asymptotic and infectious.
6. What is the diﬀerence between sensitivity and speciﬁcity when referring to laboratory tests?
Sensitivity and speciﬁcity are both a measure of a tests usefulness and are used to determine the credibility of a test. I.e: How well does the test do in detecting the disease (a positive result), and how well does the test do in detecting absence of the disease (a negative result).
Sensitivity: this can be deﬁned as the quantity of patients with COVID-19 who correctly get a positive result. e.g: If a test has a sensitivity of 99%, it means that if you test 100 positive patients it will detect 99 of them accurately with 1 patient diagnosed as false negative.
Speciﬁcity: This can be deﬁned as the quantity of patients without the disease who correctly get a negative result . E.g: If a test has a speciﬁcity of 96% it means that if you test 100 negative patients 96 will be correctly identiﬁed as negative, whilst 4 would obtain a false positive result.
7. TESTMENOW antigen tests, are they SAHPRA approved?
Yes, we only oﬀer some SAHPRA approved products.
8. Why are SAHPRA approved tests necessary?
The South African Health Products regulatory Authority ensures that all its approved products have adequately passed vigorous quality and safety inspections. www.SAHPRA.org.za
9. Will TESTMENOW antigen tests detect the new SARS-CoV-2 Variant?
Yes, the new variant will be detected.