Introduction to COVID-19 Antigen Rapid Test
What is the COVID-19 Antigen Rapid Test?
Antigen detection refers to a method that detects the presence or absence of the virus by detecting viral proteins. Antigen detection uses specific antibodies against viral antigens to directly bind to antigen proteins, and through a chemical reaction make the chromogenic reagent of the labeled antibody color to determine whether there is an antigen component, to determine whether there is a virus in the test sample. The currently approved new crown antigen detection is based on the detection of N protein.
How is the COVID-19 Antigen Rapid Test?
Antigen tests use a nasal or throat swab to obtain a sample of bodily fluids and produce results in minutes.
The first is sample collection: wipe off the nasal mucus with toilet paper, carefully unpack the nasal swab, avoid touching the swab head with your hands, tilt your head slightly, hold the tail of the swab in one hand, stick one nostril into it, and enter along the lower nasal passage. After the bottom is slowly pushed back 1-1.5 cm, the nose is rotated at least four times for at least 15 seconds, and then the same swab is used to repeat the operation on the other nasal cavity.
The second step is sample processing: place the nasal swab immediately after the sample is collected in the sampling tube, the swab head should be rotated and mixed in the preservation solution for at least 30 seconds, and the swab head should be squeezed by hand through the outer wall of the sampling tube for at least 30 seconds. Five times. Squeeze the liquid from the swab head through the outer wall of the sampling tube by hand, and then discard the swab.
The third step is sample detection: after the sampling tube is capped, drop the liquid vertically into the sample hole of the detection card. According to the reagent instructions, wait for a certain period to interpret the results (usually about 10 minutes).
COVID-19 Antigen Rapid Test result judgment
Positive result: Both "C" and "T" of the test card show red or purple-red strips, and the color of the strip at T" can be dark or light, all of which are positive results.
Negative result: A red or purple band is displayed at the "C" of the test card, and no band is displayed at the "T".
Invalid result: No red or purple band is displayed at "C" on the test card, regardless of whether the band is displayed at "T".
Novel coronavirus nucleic acid detection and antigen detection are both methods of directly detecting the virus. Compared with nucleic acid detection, antigen detection is faster, cheaper, and simpler to operate, but with lower sensitivity. It is used for early infection and large-scale screening in primary medical and health institutions. After the outbreak, many countries recognized nucleic acid testing as the "gold standard" for COVID-19 testing, and at the same time promoted antigen testing as an effective supplement. Under the current situation, the positive results of antigen testing can be used for early triage and rapid management of suspected populations, providing double protection for various risk groups.
COVID-19 Antigen Rapid Test kit supplier
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