Daxing added "anal swab" to test Covid-19. Who are the anal swabs currently used for?

The new method is used to detect Covid-19. Anal swab is suitable for all people: isolated people who come back from high-risk areas, and some isolated people who are engaged in related high-risk work. The general public will not use anal swab for testing. Although the correct rate of anal test will be improved a lot, it is really inconvenient to implement. ?

A few days ago, throat swabs, anal swabs and serum tests were conducted in the area where the infected cases were located in Daxing District, Beijing. Experts said that the study found that the positive duration of nucleic acid in feces or anal swab of some infected people was longer than that in upper respiratory tract, and increasing anal swab sampling could improve the detection rate and reduce missed diagnosis; However, anal swab sampling is not convenient enough, and it is only used for key people such as isolation points at present. ?

at the beginning of p>221, there have been clustered epidemics and sporadic cases in many places in China. What is the situation of epidemic prevention and control? Severe and complicated? . Cluster epidemics have occurred in Shunyi and Daxing-South-North districts of Beijing. According to the press conference of Beijing epidemic prevention and control work, all students, faculty and staff in the school where an asymptomatic infected person is located in Daxing District have been tested for nucleic acid and serum in nasopharyngeal swab, oropharyngeal swab and anal swab.

why take it? Enhanced version? Nucleic acid test and serum test? Wang Linghang said,? In the face of the current situation of multi-point epidemic and cluster epidemic in some areas, in order to be more secure, more sensitive measures should be taken to find more infected people and beat the situation that potential infected people spread the virus to others. ?

when do I need to collect anal swab? Eliminate missed diagnosis or auxiliary diagnosis?

Relevant experts have suggested the necessity of anal swab testing. Sometimes the patient's respiratory detoxification has stopped, but there are still some virus loads in the body. If there is virus in the patient's anal swab, defecation may pollute the environment and cause the spread from the environment to people in the cold season. ? Wang Linghang introduced, For discharged patients and high-risk suspicious persons, we suggest that the standard of discharge is to isolate until the anal swab turns negative. ? At present, it is observed that after the mutation of Covid-19, the transmission power is enhanced, but the virulence has not changed obviously. There is no difference between the clinical manifestations of patients infected with mutant virus strains and those infected with familiar virus strains. ? Covid-19 is transmitted through respiratory tract, so samples collected from different parts by nucleic acid detection have different representativeness. Nasopharyngeal swab represents the upper respiratory tract, sputum represents the lower respiratory tract, and anal swab represents the load of nucleic acid in the body. ? ? Nasopharyngeal swab sampling (sampling cotton swab) needs to go through the nasal meatus under the nose, which has an anatomical problem and needs experienced personnel to operate. The technical requirements for collection are higher than those for oropharyngeal swab, so the collection of oropharyngeal swab is more simple and operable. ?