Introduction to the principle of nucleic acid detection by Medico manufacturers

Introduction to the principle of nucleic acid detection by Medico manufacturers

We need scientific methods to diagnose or rule out whether a patient is infected with the new coronavirus.

There are currently specific and authoritative diagnostic testing methods, and there is only one: nucleic acid testing.
1. Principles of conventional nucleic acid detection

Direction: Genetics Method: RT-PCR Reverse transcription polymerase chain reaction Test object: Virus gene itself Accuracy: Maximum time: a few hours to a few days Advantages: High accuracy, is the only basis for diagnosis at present Disadvantages: Long time, High barriers to professional operation

The new coronavirus is an RNA virus that can replicate itself when it enters and infects the human body. As long as the person is infected, there must be a virus in the body. But because the virus is too small to be seen under the microscope, it cannot be confirmed directly by observation.

Throat swab sample collection.

Everyone should be familiar with the term “throat swab”, which is the primary source of samples for new coronavirus testing. Simply put, it is to use a plastic stick to reach the patient’s throat and wipe it, collect some respiratory fluid, then package it, refrigerate, and send it to the laboratory for RT-PCR testing.

However, experts soon discovered that the results of the throat swab samples were inaccurate and the probability of false negatives was high. Therefore, in different countries or regions, front-line medical workers may also collect samples such as nasal swabs, sputum, and feces for testing.