Answer:
According to the requirements for nucleic acid testing in Kaifeng, a novel coronavirus nucleic acid test and a novel coronavirus serum antibody test are required. Pharyngeal swab nucleic acid test is 78.1 yuan, the new coronavirus serum antibody test is 39.9 yuan, the two *** total 118 yuan
For the diagnosis of the new coronavirus pneumonia what are the currently commonly used tests?
Answer: Currently, the commonly used tests are viral nucleic acid test and serum test for specific antibodies against C.pneumoniae. Nucleic acid test is to detect certain specific nucleic acid sequences in the viral gene, which is a direct test for the virus. Antibody testing is an indirect test that detects the body's immune response to the virus. When the virus invades the body, the immune system produces a large number of immunoglobulins, the most common of which are IgM and IgG.
Can a positive serum-specific IgM test for C.pneumoniae be used as the basis for a definitive diagnosis?
A: No! The serologic test for specific antibody to the new coronavirus is easy to obtain, simple and fast, easy to carry out at the grassroots level, and can be used as a means of initial screening, but the diagnosis of new coronavirus pneumonia needs to be combined with the nucleic acid test or the dynamic observation of the IgM and IgG titers to determine. From the antibody point of view, the diagnosis must be based on: specific IgM, IgG antibody double positive or IgG antibody from negative to positive or IgG antibody titer in the recovery phase compared with the acute phase of 4 times or more elevated.
IgM positivity has a suggestive role in the clinic, IgM antibodies appear the earliest in the whole acute infection process, most of them begin to appear positive 3 to 5 days after the onset of the disease, until disappeared, the new Coronavirus IgM antibody positivity only suggests that there may have been a recent infection, can only be used as a means of early screening. False-positive results can occur in many clinical situations, such as the presence of rheumatoid factor, complement and other substances in the body, or the specimen is stored for a long time, contamination and other factors can also appear false-positive results.