_ What is antigen testing? What's the difference between nucleic acid detection and nucleic acid detection?
A: Antigens are like "clothes" worn outside the virus, while nucleic acids are the genes inside the virus. Antigen detection is to detect the "clothing" part from the antibody, so that the virus can be displayed.
Antigen detection is more convenient and quick, but the sensitivity is slightly poor.
Nucleic acid detection is more complicated and takes a long time to get results, but it is more sensitive.
_ Can antigen test results replace nucleic acid test results?
A: No. Nucleic acid detection is still the basis of diagnosing COVID-19 infection.
* antigen detection can be used as a supplement to nucleic acid detection.
Positive nucleic acid test: Take corresponding measures according to the infected persons in COVID-19 or the confirmed patients in COVID-19.
Nucleic acid test negative, antigen test positive: regarded as COVID-19 infected person. Take measures such as centralized isolation, close observation and continuous nucleic acid detection.
_ Who is suitable for antigen testing?
A: There are three types of people:
Persons who have symptoms such as respiratory tract and fever and come to primary medical and health institutions for treatment and have symptoms within 5 days.
Isolated observers, including home isolated observers, close contacts and sub-close contacts, entry isolated observers, closed control area personnel and control area personnel.
Community residents who need antigen self-test
_ What are the steps of self-test?
1, antigen preparation before self-test.
wash one's hands
Wash your hands with running water or hand disinfectant.
② Understand the detection process.
Read carefully the supporting instructions of antigen self-test reagent and the precautions related to antigen self-test.
③ reagent preparation
Check whether the antigen self-test reagent is within the warranty period, and check whether the contents such as nasal swab, sampling tube and test card are missing or damaged.
* If the reagent expires or the contents of the reagent are lost or damaged, the detection reagent should be replaced in time.
④ Confirm the test environment.
Colloidal gold test paper generally requires room temperature of 14℃-30℃ to avoid abnormal test results caused by supercooling, overheating or excessive humidity. The antigen test card is unpacked and placed in a flat and clean place.
2. Sample collection
Blow your nose with toilet paper.
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Carefully open the outer package of the nasal swab to avoid hand contact with the swab head.
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Tilt your head slightly, hold the tail of the cotton swab with one hand, stick it on one nostril, slowly retreat 1- 1.5 cm along the bottom of the inferior nasal passage, stick it on the nasal cavity and rotate it for at least 4 times, and then repeat the same operation with the same cotton swab on the other nasal cavity.
*/kloc-people over 0/4 years old can take nasal swab samples by themselves.
* Self-taught students aged 2-14 should be sampled by other adults.
3, antigen detection
① Place the nasal swab immediately after the sampling tube collects the sample, rotate the swab head in the preservation solution for at least 30 seconds, and squeeze the swab head through the outer wall of the sampling tube for at least 5 times by hand.
② Squeeze the liquid at the tip of the cotton swab out through the outer wall of the sampling tube by hand, and then discard the cotton swab. After covering the sampling tube, drop the liquid vertically into the sample hole of the detection card.
(3) According to the reagent instructions, wait for a certain time to interpret the results.
Positive results: both "C" and "T" are red or purple bands, and the band color at "_" can be dark or light, which are all positive results.
Negative result: red or purple bands are displayed at "C", but no bands are displayed at "T".
Invalid result: Red or purple stripes will not be displayed at "c" regardless of whether stripes are displayed at "_".
_ What about the self-test results?
1, antigen test positive:
Report to the local community immediately, and the community will contact the emergency center to transport residents to medical institutions with fever clinics for nucleic acid detection according to the guidelines for transporting personnel related to the COVID-19 epidemic.
2. Negative antigen test:
_ Asymptomatic residents can observe closely, and then carry out antigen detection or nucleic acid detection when necessary.
_ It is suggested that residents with symptoms go to medical institutions with fever clinics for nucleic acid testing as soon as possible.
If it is inconvenient to see a doctor, you should be isolated at home, avoid going out for activities, and conduct antigen self-test once a day for 5 consecutive days.
_ What should I do with the used self-test reagent?
1, isolated observer:
No matter whether the test result is negative or positive, all sampling cotton swabs, sampling tubes and test cards are used. Put it in a sealed bag, and the management personnel can consult the medical waste or handle it according to the procedure.
2. Community residents:
_ Negative test results: all used nasal swabs, sampling tubes, test cards, etc. Put it in a sealed bag and treat it as general garbage.
_ Positive test result: When the personnel are transported, they will be handed over to medical institutions for treatment as medical waste.
_ Where can I buy a self-test reagent?
1, community residents have self-test requirements:
You can buy antigen detection reagents for self-test through retail pharmacies, online sales platforms and other channels.
2. Isolate the observer:
The management department that organizes isolated observation is responsible for the procurement, distribution and management of antigen detection reagents.
* Note: In order to ensure the quality of sampling and testing, residents should read the instructions carefully, and carry out sampling, adding samples and interpreting the results in a standardized manner according to the specified requirements and procedures.