In response to the recent epidemic in many places in China, the epidemic prevention and control situation is complex and serious, the State Drug Administration approved a number of new crown antigen self-test products on the market. However, there are still many questions about the new term "NCAA self-test".
"How to test the new coronary antigen self-test?" "Is it a throat swab or a nasal swab?" "Does it hurt to do it myself?" "What are the steps in the operation?" ...... for the general concern, the recent sampling swab manufacturers Shenzhen medi biology editorial purchased a new crown antigen detection kit for pro-test.
It is understood that the antigen is like the virus outside wearing "clothes", nucleic acid is the virus inside the gene. The antigen test is to measure the "clothes" from the antibody, so that the virus shows up.
The new crown antigen detection kit is divided into three types, respectively, colloidal gold method, latex method, fluorescence immunosphere analysis method, three types of use slightly different. The reporter purchased the kit produced by Wanfu colloidal gold method, received the kit inside a single-use sterile sampling swab, sample extraction solution, test cards and biosafety garbage bags. The sample extraction solution also includes a sample extraction tube and drip tip. According to the instructions, the kit is to be stored within 2°C-30°C and is provisionally valid for 6 months. After the aluminum foil bag is opened, the test card should be used as soon as possible within 1 hour. Sample extracts are to be capped immediately after use.
Instructions are written for the product to be used for novel coronavirus antigen detection in oropharyngeal swab and nasopharyngeal swab samples. Pharyngeal secretions are collected by inserting the swab completely from the mouth into the pharynx, centering on the throat wall and the reddened part of the palatine tonsils, and wiping the bilateral pharyngeal tonsils and the posterior pharyngeal wall with moderate force. Nasopharyngeal secretions are collected by gently inserting a sterile swab, keeping the swab near the nasal septum, while gently pushing the swab into the posterior nasopharynx, rotating the swab several times and then removing it from the nostrils. Samples should be processed as soon as possible after collection using sample extraction solution.
The reporter followed the instructions to first blow the nose with a tissue to keep the internal nasal cavity hygienically clean, and then unscrewed the outer package to remove the disposable sampling swab. The reporter then slightly tilted his head, one hand on the end of the swab stick one side of the nostril into, along the bottom of the lower nasal passage back slowly deep 1-1.5 cm, stick the nasal cavity rotate 5 turns, and stay for 15 seconds. After that, the same swab was used to repeat the same operation on the other nasal cavity.
Immediately after sampling was completed, the reporter placed the swab after sample collection in the sample extraction tube and swirled the swab head in the extraction solution and mixed it well. After 30 seconds of mixing, the swab head was squeezed by hand across the outer wall of the sample extraction tube to ensure that the sample was fully eluted in the tube and the cap was placed on. After allowing 1 minute for the sample to dissolve in the solution as much as possible, the reporter unscrews the clear cap at the top of the sample extraction tube and drops the treated sample extract into the test card spiking hole. Finally, wait 15-20 minutes for the results to be interpreted according to the reagent instructions.
C and T at the same time show a crossbar is positive, only C shows a crossbar is negative, if C does not show a crossbar means that the test is invalid, need to resample for testing.
After 15 minutes, the reporter test result was negative. Due to the detailed instructions for use is easier to understand, in addition to the nasal swab brought a little discomfort, the test process went smoothly.
The new crown antigen test kit is available, many people are concerned about how to buy the kit? The 17th reporter carried out the understanding.
The reporter contacted a number of medical institutions in the city by phone and found that there are already some medical institutions selling the new crown antigen test kits. In a medical institution in Qujiang New Area, the reporter bought a 1-person kit, the price is 28 yuan. The person in charge of the medical institution introduced that he bought a batch of kits from the manufacturer on the 16th, and the number of people who bought them is very small, only two were sold. "Maybe now less people understand, as a supplementary means of epidemic prevention, we will still actively stock and transfer the goods to protect and meet the residents' demand for self-testing in the future." The person in charge said.
According to the official website of the State Drug Administration, as of March 16, the State Drug Administration has approved 12 new coronavirus antigen detection reagents products, manufacturers include Guangzhou Wanfu Biological, Beijing Jinwoofu, Shenzhen Huada Innogen, Beijing Heatscape Biological, Beijing Lepu Diagnostics, Beijing Wantai Biological, etc. The reporter searched in the Meituan App and found that the city's pharmacies are not yet selling the new crown antigen test kit in Meituan, there are three pharmacies in Beijing, Liaoning and Jiangxi in China that can ship the kit nationwide by express, and the price of the kit is more than 20 yuan for one person. Most pharmacies are pre-sales, the fastest delivery time for March 20. Hungry platform is also shipped by courier from other parts of the country, a few spot is expected to be delivered 1-3 days. Jingdong Health, Tmall Health and other platforms can be searched for different manufacturers of new crown antigen test kits, there are spot direct delivery, there are also pre-sale products, the price of 1 person between 20-30 yuan. The reporter found that in addition to 1 person, each platform also sells different sizes for 10, 20, 50 people.
The antigen test is more convenient and quicker, but slightly less sensitive. The nucleic acid test is more complex and takes a long time to obtain the results, but is more sensitive. According to the National Health Commission, antigen testing is used as a complementary tool for screening specific populations, which helps improve "early detection" capabilities. For some places where sampling is not convenient, or due to limited medical conditions, there are no suitable conditions to do amplification, antigen testing is a simpler and faster way to identify people infected with the new coronavirus. It is not clear whether the results of self-testing for neointestinal antigen can be used as a travel certificate.
Who can self-test?
Can self-test results replace nucleic acid results?
Where can I buy self-testing reagents?
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