Swab test | Disposable virus sampling swab
Disposable virus sampling swab, I believe you are no stranger in the past two years. Because most of the detection tools used for nucleic acid test are disposable sampling swabs. Usually, we see most nasal swabs and pharyngeal swabs. But disposable virus swabs are not only useful for nucleic acid testing. What else can a disposable sampling swab do? Let’s get to know.
What can a disposable virus swab be used for?
In addition to nucleic acid detection, scientists can also use disposable sampling swabs for microbial collection. They are usually used for virus detection and research in hospitals or laboratories. Researchers use disposable sampling swabs to detect biological samples in natural cavities of human or animals. Such as throat, nose, mouth, vagina and so on. It is necessary to collect oral epidermal cells and nasal virus samples with a sampling swab, store the cells and samples in the sampling tube and transfer them to the laboratory for examination.
Oropharyngeal swab sampling
Operation (use) method of disposable sampling swab:
Take pharyngeal swab as an example:
① Tear open the packaging bag of the disposable sampling swab and take out the disposable sampling swab from the bag;
Note: please do not let the disposable sampling swab touch the place outside the throat to avoid pollution.
② Put a disposable sampling swab into the mouth and quickly wipe the palatal arch and throat (or lesion) on both sides
③ Take out the swab, put it into the disposable virus sampling tube, break the disposable sampling swab at the broken place and discard the tail;
④ Tighten the sampling tube, put the virus sampling tube into the biosafety bag and submit it for inspection in time.
Note: please do not shake the virus sampling tube excessively to avoid dilution and loss of samples. After sampling, do not touch other objects with a disposable sampling swab.
How to carry out COVID-19 nasal swab test?
The doctor shall wear protective clothing, mask, gloves and mask to let the patient take a proper position.
Gently insert the flocked sampling swab into the nose, rotate it for three times, take it out and put it into the sample tube with protective solution, and screw the cover. Then label it, write the date, and send it to the laboratory for nucleic acid test of nasopharyngeal swab.
What is a COVID-19 swab test?
Swab test, namely nucleic acid test. The substance test by nucleic acid is the nucleic acid of virus. Nucleic acid detection is to collect the presence of viruses in the respiratory tract, blood or feces of patients, and determine whether they are infected by COVID-19. Therefore, once detected as nucleic acid “positive”, it can prove that there is a virus in the patient’s body.
SARS-CoV-2 nucleic acid detection process.
The usual sample types include throat swabs, nasal swabs, sputum, bronchoalveolar lavage fluid, alveolar lavage fluid and so on.
The sampling personnel shall conduct PCR detection as soon as possible after obtaining patient samples.
After the testing institution receives the sample, the laboratory personnel shall extract nucleic acid from the sample. And the nucleic acid extraction reagent shall use the nucleic acid extraction kit specified in the approved product manual.
Disposable virus sampling swab material.
At present, because of its stable and reliable performance and excellent absorption and elution capacity, nylon flocked swabs are widely used in COVID-19 sampling.
Swab test result
Swab testing for novel coronavirus pneumonia usually takes 4-6 hours to produce results, while rapid examination takes 2-3 hours. However, the reagents used in each hospital are different, so the time of results is also different.
COVID-19 positive results：Maybe infected.After 24 hours of self isolation, the positive patients need to conduct swab test again.
If the two results are positive, the next step is to improve CRP, blood routine, chest CT and other tests to determine whether COVID-19.
When COVID-19 nucleic acid test is negative once, it should be combined with the clinical symptoms and epidemiological contact history of patients. Because a COVID-19 nucleic acid swab test is negative, it can not completely exclude the infection of COVID-19.