Nasopharyngeal Covid-19 Rapid Antigen Swab Rapid Self Test Kit
Brand Name:Ascentet
Certification:CE FDA TGA
Model Number:OEM
Minimum Order Quantity:10000pcs
Delivery Time:5-20 days
Payment Terms:T/T, Western Union, MoneyGram
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Flat 601,6/F, Vastkin House, 84 Jervois Street, Sheung Wan, Hongkong
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15mins Reading One Step Covid POCT Covid-19 2019-NCoV Antigen Rapid Test Kit
Test Principle
This kit uses immunochromatography. The test card contains: 1) recombinant SARS-COV-2 antigens and quality control antibodies, and both are labeled with colored microspheres; 2) two detection lines (G and M lines) and a quality control line (C line) are fixed on nitrocellulose membrane, M line is fixed with monoclonal anti-human IgM antibody for detecting SARS-COV-2 IgM antibody, G line is fixed with monoclonal anti-human IgG antibody for detecting SARS-COV-2 IgG antibody, and C-line is fixed with quality control antibody.
When an appropriate amount of the test sample is removed to the
sample hole of the test card, the sample will move forward along
the test card with the reaction of capillary. If the sample
contains IgM antibody, the antibody will bind to the colored
microsphere-labeled SARS-COV-2 antigen. The immune complex will be
captured by the anti-human IgM antibody immobilized on the membrane
and form a red M line, which represents a positive test result of
SARS-COV-2 IgM antibody test.
If the sample contains IgG antibody, the antibody will bind to the
colored microsphere-labeled SARS-COV-2 antigen, and the immune
complex will be captured by the antibody immobilized on the
membrane and form a red G line, which indicates a positive test
result of SARS-COV-2 IgG antibody test.
If neither the G line nor the M line shows color, the test result
is negative. The card also contains a quality control line C line.
No matter G or M detection line shows color or not, the quality
control C line in red should always be visible. The quality control
line is the color band of the quality control antibody immune
complex. If the C line does not appear, it indicates that the test
result is invalid, and thus a re-test is required with an unused
test card.
Something you need to learn about:
1) What is the difference between an antigen test and a molecular
test?
An antigen test detects specific proteins on the surface of the
virus. These tests are quicker and less expensive, but have a
higher chance of missing an active infection, according to the FDA.
A molecular (PCR or polymerase chain reaction) test detects the
virus’s genetic material. These tests require a more complex
technology to get results, and it usually takes a day or two to get
those results (depending on lab capacity, results may take up to a
week).
If an antigen test shows a negative result and you have reason to
believe you may have the virus (because of symptoms or exposure),
your doctor may order a molecular test to confirm the results.
2) Which tests are more accurate?
No test is 100% accurate, but the molecular tests are considered to
be more accurate than the antigen tests, according to available
research.
According to the FDA, an antigen test cannot “definitively rule out
active coronavirus infection,” but positive results are “highly
accurate” (negative results may require a confirmation test).
Harvard Medical School wrote in August that the reported rate of
false negatives with molecular testing is as low as 2% and as high
as 37%. A molecular test using a deep nasal swab will have fewer
false negative results than samples from throat swabs or saliva,
they say.
For antigen testing, Harvard noted that the reported rate of false
negative results can be as high as 50%, but that the FDA has
granted emergency use authorization for a more accurate antigen
test.
In general, some of the issues that may affect the accuracy of a
test include ineffective swabbing, contamination or mishandling of
the sample, or problems with the testing chemicals, according to
the FDA.
3) If antigen tests are less accurate, why would we use them?
Experts say the value in the rapid antigen tests is in the
frequency of the testing rather than the accuracy, with repeated
testing recommended. According to Science, getting a false negative
in an antigen test two or three times in a row is rare. This
strategy lines up with the NPR report mentioned above, which would
employ daily testing of those in high-risk areas.
4) Who must be tested for COVID-19?
As per the Minister’s Directive: COVID-19: Long-Term Care Home
Surveillance Testing and Access to Homes (Minister’s Directive)
effective January 8, 2021, all staff, student placement and
volunteers working in long-term care homes must be tested regularly
in accordance with the Minister’s Directive, unless the exception
for individuals who have previously had laboratory confirmed
COVID-19 applies. The testing requirements in the Minister’s
Directive include all individuals working in long-term care homes
who are: • Staff as defined in the Long-Term Care Homes Act, 2007 •
Volunteers as defined in the Long-Term Care Homes Act, 2007 •
Student placement, meaning any person working in the long-term care
home as part of a clinical placement requirement of an educational
program of a college or university, and who does not meet the
definition of “staff” or “volunteer” under the Long-Term Care Homes
Act, 2007. The Minister’s Directive also includes additional
testing and documentation requirements for general visitors,
caregivers and support workers.
Nasopharyngeal Covid-19 Rapid Antigen Swab Rapid Self Test Kit
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