How is SARS caused?

The source of human SARS infection is in wild animals, among which civet cats are the main carriers of SARS virus. SARS virus exists in wild animals in different areas. This virus can be transmitted to people. The gene sequencing analysis of civet SARS virus showed that the homology of human SARS virus was above 99.8%, which indicated that wild animal SARS virus could directly infect people.

The virus is mainly excreted from the feces of various wild animals, and its detoxification amount is amazing. It is relatively stable in the environment, especially in the wet and cold environment, and can last for several days. In a dry state, feces can turn into dust and be inhaled to cause infection.

Extended data

Transmission routing

1, mainly transmitted through close respiratory droplets and close contact. In particular, the medical staff who perform tracheal intubation and tracheotomy on critically ill patients are in direct contact with a large number of respiratory droplets and are easily infected. There have been cases in which medical staff gather to be infected with SARS. ?

2. Other possible modes of transmission: The virus has been detected in feces, urine and blood of SARS patients, so other modes of transmission such as fecal transmission are not excluded.

For example, in the Taodayuan epidemic in Hong Kong, there were 1 SARS patients with diarrhea. Within four weeks, 328 people in this residential area were infected with SARS, and most of them developed diarrhea symptoms. In the end, the pollution of food or drinking water in the building was eliminated by the local authorities. It is likely that the U-shaped water collector at the ground outlet of the fecal drainage pipeline system was dry-adjusted, but it could not play the role of gas barrier, leading to sewage gasification and virus spread.

China Com- four reasons to kill civet cats because the SARS gene of civet cats is becoming more and more humanized.

Baidu Encyclopedia-SARS Virus