Many students in Yizhou, Guangxi were infected with norovirus. What are the characteristics of Norovirus?

Students in seven schools, including Huaiyuan Middle School and Luoxi Middle School in Yizhou District, Guangxi, have some uncomfortable symptoms, such as abdominal pain and vomiting. Among them, 85 students were fine after hospitalization, but this kind of collective discomfort caused great concern of Yizhou District Committee and government, and an emergency working group was set up at the first time to investigate and collect evidence from schools.

Yizhou CDC also quickly gave the test results, which were a series of abdominal pain and vomiting symptoms caused by norovirus infection.

A boarding school in Liaoning once caused students to be infected with norovirus and sent to the hospital collectively because the hygiene of the canteen was not up to standard, and a university in a certain place also caused students to have fever, abdominal pain and other discomfort symptoms one after another.

Why are universities prone to Norovirus outbreak? In fact, Norovirus has no designated occasion, but these colleges have failed to do their own hygiene well, and neglected management in dealing with things, cleaning tableware, and sanitation of dining environment, thus giving the virus an opportunity, and the collective life mode of the school has made Norovirus spread wildly.

What are the characteristics of Norovirus? Norovirus is a highly pathogenic and infectious gastrointestinal virus. The high incidence season is generally in winter and early spring when the temperature is low. There is no specific medicine for the clinical treatment of norovirus, which mainly depends on the patient's own resistance and immunity. Moreover, this virus mutates rapidly and can be repeatedly infected by the same person. It is a completely different type of Norovirus strain. Even if it has been infected before, the second immunization is ineffective.

Strong infectivity, long detoxification time and short immune protection period are the remarkable characteristics of norovirus.

Norovirus is highly contagious, not only in the outbreak of mass infection, but also in the excrement and vomit of patients. The latent infection from the incubation period is also highly contagious. This latent infection period, also called detoxification period, can last for about three weeks.

In addition, norovirus itself has a strong vitality, which can survive for half a month on the surface of attachments and several months in water at 0 to 60 degrees. Norovirus is not sensitive to alcohol and hand sanitizer, but it can be killed by washing with high concentration of chloride ion.

Clinical manifestations of norovirus infection The incubation period of the virus is short, generally less than three days, and symptoms appear as soon as 12 hours. Common discomforts mainly include abdominal pain, vomiting, headache, fever and muscle pain. Children and adults have different symptoms, mainly vomiting and fever.

Norovirus is a self-limiting infectious disease. It can be gradually recovered after three to four days' rest without antibiotics and timely supplementation of sugar and salt water.