Can antigen detection instead of nucleic acid detection?Who can do it?Attach purchase strategy
Recently, my country’s epidemic conditions have frequently occurred, and the situation of preventing and controlling the situation is complicated and severe. In order to cope with the epidemic, the National Pharmaceutical Bureau approves the listing of many new crowns’ original self -test products. The antigen detection is convenient and fast, and the results are about 10 minutes as soon as possible.
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Can antigen detection results replace nucleic acid detection results? Who can test? What are the specific steps? Where to buy reagents? Let’s take a look together.
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What is the difference between antigen detection and nucleic acid detection
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Antigen detection -detection of genetic material DNA in the virus
Nucleic acid test -detection of protein on the virus surface
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The antigen is like the “clothes” worn outside the virus, and the nucleic acid is the gene in the virus.
The antigen detection is to test the “clothes” from the antibody and let the virus be displayed.
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Compare the pros and cons
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The antigen detection is more convenient and fast, but the sensitivity is slightly worse.
Nucleic acid testing is more complicated, the results have been obtained for a long time, but the sensitivity is higher.
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The sensitivity of nucleic acid detection is about 100 to 1000 times higher than the antigen. However, when the virus concentration is as high as one million to 10 million per milliliter, the antigen can be detected.
The antigen detection results Can it replace the results of nucleic acid detection?
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cannot. Nucleic acid testing is still the confirmation basis for new coronary virus infections. The antigen detection can be used as a supplement to nucleic acid detection.
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Nucleic acid test positive: corresponding measures are taken according to the new coronal virus infection or the diagnosis of new coronary pneumonia.
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Nucleic acid detection negative, antigen detection positive: deemed new coronal virus infection. Take measures such as centralized isolation, observe closely, and continuously detect nucleic acid testing.
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Who applies antigen detection
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When you go to the grass -roots medical institution, you will be accompanied by symptoms such as respiratory tract, fever and other symptoms, and have symptoms within 5 days.
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Observation staff, including home isolation observation, confidentiality and sub -connection, entry isolation observation, sealing control areas, and management control areas.
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Community residents with antigen self -detection needs.
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1. Preparation of antigen self -test
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handwashing
Wash your hands with flowing water or hand disinfection solution.
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Understand the detection process
Carefully read antigen self -test support instructions and antigen self -test -related precautions.
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Reagent preparation
Check whether the antigen self -test agent is missing or damaged in the nasal swab, sampling tube, detection card and other contents during the shelf life. (If the reagent expires or the content of the reagent content is missing or damaged, the test agent should be replaced in time)
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Confirm the detection environment
Glamor gold test strip testing-Bymore requires abnormal test results to avoid excessive cold, overheating or excessive humidity environment under the normal temperature conditions of 14 ° C-30C. The antigen detection card is removed and packed in a flat and clean place.
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2. Sample collection steps
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Use sanitary paper to nose
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Carelessly disassemble the nose and wipes out of packaging to avoid the hand contact of the hand
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The head is slightly leaning, the tail of the tail is pressed with one hand, and the nostrils on one side enter. After the bottom of the lower nose, slowly penetrate 1-1.5 cm, and rotate at least 4 times with the nasal cavity (staying at no less than 15 seconds). Then use the same swab to repeat the same operation for another nasal cavity
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*Those over 14 years old can sample for the nasal cavity swab
*Self-inspection at the age of 2-14 shall be sampled by other adults on behalf of
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3. antigen detection steps
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The nose after collecting the sample is immediately placed in the sampling tube. The wound head should be rotated and mixed in the saving solution for at least 30 seconds.
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After the outer wall of the sampling tube is across the hand, squeeze the wound head liquid, and abandon the swab. After the sampling tube is covered, the liquid is drip vertically into the sample hole of the detection card.
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According to the reagent instructions, the results of the results after waiting for a certain period of time.
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Picture source: CCTV News Client
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Positive result:
Both “C” and “T” show red or purple strips. The color of the strip of the “T” can be deep or shallow, both of which are positive results.
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Negative result:
The red or purple band is displayed at the “C”, and the “T” is not displayed at the “T”.
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Invitutional result:
“C” does not show red or tight -color bands, regardless of whether “T” is displayed.
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How to deal with the results and reagents after testing
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1. How to deal with self -test results
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Antigen detection positive:
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Immediately report to the community (village and towns) where the community (village and town) contact the first aid center, and transfer the residents to medical institutions to set up a hot nursing clinic in accordance with the guidelines for transfer of personnel transfer work in the new crown pneumonia.
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Antigen detection negative:
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Symptoms of no symptoms can observe closely and perform antigen detection or nucleic acid detection when needed
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Symptoms of residents are recommended to go to medical institutions that send hot kidneys as soon as possible for nucleic acid testing.
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If it is inconvenient to consult, you should be separated at home to avoid going out, and you should take antigen self -test once a day for 5 consecutive days.
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2. How to deal with the self -testing agent used up
Intersection
The test results are negative or positive. All the samples, sampling tubes, and detection cards after use are loaded into a sealed bag. Managers refer to medical waste or proceeded according to procedures.
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Residents:
Detection results negative: All nose swabs, sampling tubes, detection cards, etc. after use are put into a sealed bag for general garbage treatment.
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Positive detection results:
The medical institutions are handed in accordance with the medical waste when the personnel transport.
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Product price and purchase channels
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On March 12, the State Drug Administration approved five new crown antigen products of Nanjing Nuoweizan, Beijing Kim Wolf, Shenzhen Huada Yinyuan, Guangzhou Wanfu Biology, and Beijing Huacai Thailand. The unit price of the reagent is around 20 ~ 30 yuan.
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Where can I buy a self -test agent
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Community residents have self -test needs:
You can purchase antigen detection reagents for self -testing by retail pharmacies and online sales platforms.
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Isolation observer:
The management departments (such as communities, villages and towns, isolation points, etc.) that areolated observations are responsible for the procurement, distribution, and management of antigen detection reagents.
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*Note: In order to ensure the quality of sampling detection, residents must read the instructions carefully, and conduct a standardized sampling, sample, and results interpretation in accordance with the requirements and processes in accordance with the prescribed requirements and processes.
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Reference materials:
CCTV News.
Science and Technology Board Daily.
