What should nucleic acid test pay attention to?The questions you want to know are here


To meet the needs of epidemic prevention and control, some localities have organized nucleic acid tests for residents.So what is the significance and function of nucleic acid detection?What should we pay attention to before and after nucleic acid test?Here, with you a simple popular science.Q: What is the significance and function of conducting nucleic acid testing for all personnel?A nucleic acid test is to directly find the evidence of the existence of the virus, that is, if a person is infected with the virus, there will be virus remains in the respiratory tract of the pharynx. If the virus remains are separated from the samples collected by smear or sputum, that is to say, the test result is positive, it proves that the person has been infected with the virus.Therefore, it is of great importance as a diagnostic criterion for COVID-19.What are the nucleic acid testing methods?A nucleic acid test is generally taken by pharyngeal swab test method, mainly divided into nasopharyngeal swab test and oral pharyngeal swab test.As the name implies, nasopharyngeal swabs are taken from the nose, and oral swabs are taken from the mouth.There is no fundamental difference between the two methods. Most hospitals and institutions use oral and pharyngeal swabs because they are less painful and easier to take.What is a throat swab?Does it hurt to take a throat swab?A throat swab is a painless method of taking a swab from your throat using a cotton swab. Some people may experience mild nausea or irritation in the throat that quickly resolves or goes away.Q: Will nucleic acid testing harm the human body?A: It does not cause any harm to the human body, only a slight foreign sensation when the swab is taken deep into the throat.What is the principle of nucleic acid testing?Answer to be based on the principle of antibody in immunology and antigen specific union, in pathogen immune detection, according to the pathogen inside the patient whether and specific antibody union, can judge the kind of pathogen.In layman’s terms, viruses can be detected by amplifying viral gene fragments in samples to identify fluorescent signals.Q: What should we pay attention to before and after nucleic acid test?Answer before test: try to avoid eating 2 hours before nucleic acid test to avoid vomiting;Do not drink water, drink, smoke, drink or chew gum 30 minutes before sampling.To reduce swallowing action, do not clear the throat (such as expectoration and spitting) action.Prior to taking a nasopharyngeal swab, the subject should inform the collector of any prior medical history or related issues.Such as history of nasal surgery, nasal septum curvature, blood disease, throat disease, or use of anticoagulants and other related risk factors;Wear a mask correctly before the test. Take it off before the test and put it on immediately after the test. A spare mask can be prepared to be replaced at any time after contamination.During the test: During the oral and pharyngeal swab collection, the subject tilts back his/her head, relaxes as far as possible, takes a deep breath, and opens his/her mouth to make a sound of “ah”, which is helpful to expose his/her throat, but during this process, irritant dry cough, nausea, vomiting and other symptoms may occur;Nasal itching may occur during nasopharyngeal swab collection, which may stimulate sneezing. Use tissue or elbow to cover immediately.After test: leave the collection site immediately after collection, and avoid spitting and vomiting around the collection site.Before and after the nucleic acid test, pay attention to hand hygiene. Use hand sanitizer, alcohol or disinfectant cotton to wipe hands.Other notes:Due to medical personnel protection, probably can’t hear talk, is also in order to improve the efficiency, please be sure to have your id card and hu kou book, wearing a face mask (had better wear two, one spare), with a packet of tissues could cause uncomfortable tears (acquisition), can advance the name, id number, address, phone number now,Write a piece of paper in advance (please keep the font neat when writing, easy for staff to identify) to the relevant personnel!How many times do nucleic acid tests need to be done and how long will it take to get the results?Answer nucleic acid test is to do two or more times to ensure that its accuracy is higher.Under normal circumstances, the results are 24-48 hours after the first completion, and the second test can be done after the first result.After the nucleic acid test is completed, the testing institution will input the individual test results into the relevant information system, and residents can quickly check their nucleic acid test results through the “State Council client” by inputting their name and ID number.Q: What are the procedures of nucleic acid testing?A nucleic acid detection is now as soon as possible, the most effective way to determine if the virus nucleic acid detection include sample inactivated, specimen processing, nucleic acid extraction and amplification, and the results reported six steps, each step carefully operation, unusually large workload, and the operator will be directly to coronavirus, risk is very high, the laboratory condition is also very strict.What is the Novel Coronavirus antibody test?A NUCLEIC acid test is an “in-progress” test that detects specific nucleic acid sequences in the viral genome through methods such as polymerase chain reaction to determine whether the person being tested is infected with the virus at the moment.Unlike nucleic acid tests, novel Coronavirus antibody tests reveal who has been infected.Antibody testing, also known as serological testing, is designed to detect antibodies in a blood sample.When the human body is infected with a virus, it produces IgM or IgG antibodies.At the beginning of infection, the human body rapidly produces IgM antibodies to fight infection;In contrast, IgG antibodies are produced more slowly, but retained longer.Antibody testing is to detect the presence of these specific antibodies in the serum to determine whether the tested person has been infected.In terms of testing methods, nucleic acid testing is usually done by taking a nasopharyngeal swab and sending the sample to a laboratory for testing.Some companies are developing antibody tests that prick a finger and get results in minutes.If nucleic acid tests are conducted only, false-negative patients may be missed.The presence of novel Coronavirus antibodies can help identify those who have been infected but never realised they were.@Pentium Media Producer/Gong Chunwei, Wang Yupu/Li Xia, editor/Pei Xuan Source: Health China Action Statement/reproduced with reference to pentium Media wechat official account

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