What about COVID-19 Nucleic Acid Test?

During the COVID-19 epidemic, everyone was very concerned about the epidemic situation while doing their personal protection. The winter and spring communication season was originally a period of common cold and flu. The most important means to control the epidemic was to screen out the true COVID-19 patients from many respiratory patients. So, how is COVID-19 diagnosed?

How is COVID-19 diagnosed?

First, patients with COVID-19 are usually symptomatic, although some patients have mild symptoms. A blood test and a chest radiography examination can suggest the possibility of COVID-19. Of course, the diagnosis of COVID-19 still depends on the detection of COVID-19 nucleic acid. A blood antibody test may appear soon to help diagnose COVID-19.

Flocked Swab

What about COVID-19 nucleic acid test?

The sampling method for COVID-19 nucleic acid detection requires neither surgery nor injection, just a "smudge".

At the fever clinic or the corresponding examination room, the doctor will let the patient open his mouth and wipe the secretions near the tonsils and pharyngeal crypts with a block like Flocked Swab. You can also take the secretions from the back of the nasopharynx through the nasal cavity and put go to the test tube and give it to the laboratory for the corresponding viral nucleic acid test.

Can X-ray chest radiographs be used as a diagnostic tool for COVID-19?

In fact, X-ray chest radiographs can also prompt the new crown virus pneumonia. With the summary of the accumulated cases, it can be found that the image of COVID-19 on the chest radiograph is very thin and the distribution is peripheral. Therefore, it can also be seen on well-distributed chest radiographs.

The best and most sensitive imaging method for COVID-19 is chest CT. At each level of the CT scan of the chest, certain angles and thinner shadows that can not be seen on the chest radiograph can be seen, so that the patient may be early noticed that he may have viral pneumonia. Once these characteristics appear, the diagnosis of COVID-19 should be performed in combination with the detection of nucleic acid.Can a blood test confirm COVID-19?

Studies have shown that the proportion of viral nucleic acids found in the blood of patients with COVID-19 is small, only 15% to 20%. After the body invades the new crown virus, the body will produce specific antibodies. The new crown virus antibodies IgM and IgG can be detected in the blood. However, IgM and IgG do not appear until 5 days after the patient is infected with the new coronavirus.

At present, our country's scientific researchers have done a lot of work. As for the blood test of the new coronavirus, Chinese researchers are now focusing on speeding up the optimization of the detection technology to increase its specificity and sensitivity.

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