New coronavirus is a new coronavirus is a variant of coronavirus, human infection will cause pneumonia, belongs to an acute respiratory infectious disease, very infectious, and the population is generally susceptible. It is very easy to replicate in the human upper respiratory tract, and generally within 96 hours of infection, the virus can be detected in the human upper respiratory tract by means of rapid detection of new coronavirus nucleic acid.
The human upper respiratory tract includes the nasal cavity, pharynx and throat. In other words, if a person is infected with the new coronavirus, the nucleic acid of the virus can be extracted from the nasal cavity, pharynx, and throat within 96 hours, so we generally sample these locations during the rapid nucleic acid test.
We differentiate the swabs by the location of the sample, and we call them nasopharyngeal swabs for nasal samples and oropharyngeal swabs for intraoral samples.
In addition to the difference between nasopharyngeal swabs and oropharyngeal swabs, the hardness of the material is also different. Nasopharyngeal swabs are generally slender and soft, and can change shape along the nasal cavity, making it easy for the sampler to probe into the upper respiratory tract along the nose. The oropharyngeal swab, on the other hand, will be thicker and harder.
In terms of comfort, there is also a very big difference between the two. Because the nasal cavity often exchange gas, so when sampling, the swab should be fully extended to the end of the nasal cavity to ensure the collection of a sufficient concentration of samples, which often causes great discomfort to the person sampled, and sometimes even cause nasal bleeding. In contrast, the oropharyngeal swab only needs to collect samples from the pharynx, and only requires the person to open his or her mouth for collection, which may occasionally cause a brief sensation of vomiting, but the discomfort does not last long.
There is also a significant difference in viral load between the two. Studies have shown that the viral load on nasopharyngeal swabs is significantly higher than that on oropharyngeal swabs in patients infected with neocoronavirus. This means that in terms of detection, the nasopharyngeal swab is generally higher than the oropharyngeal swab.
In addition to nasopharyngeal and oropharyngeal swabs, there are also anal swabs. As the name implies, anal swab is a sample collection from the anus of the person being sampled. It is a test for patients with gastrointestinal symptoms and can effectively improve the detection rate, but it is not widely used because sampling is very inconvenient.
After completing the swab sampling, the swab is immediately placed in a preservation tube to avoid contamination of the sample. Once the sampling is completed the subsequent rapid nucleic acid testing process for new crowns can be performed. No matter what swab, the process of performing the New Coronary Nucleic Acid Rapid Test is the same, in the laboratory reagent preparation area, sample preparation area, amplification area, product analysis area, which are independently separated from each other to complete the New Coronary Nucleic Acid Rapid Test and get the results of the New Coronary Nucleic Acid Rapid Test.
