Norovirus infection in a school in Gaozhou City

 Norovirus infection in a school in Gaozhou City

Gaozhou Health Bureau

September 30, 2020

Norovirus prevention knowledge

In recent years,

Strong into our eyes,

It is characterized by acute onset and rapid transmission,

Well known,

60% - 80% of winter diarrhea is caused by it.

However, norovirus infection is not difficult to treat,

As a self limiting disease,

The symptoms usually disappear in about 3 days,

Severe patients with symptomatic treatment can also recover!

So, what is norovirus?

How does it spread? What are the symptoms?

See below


What is norovirus

Norovirus is the most important virus causing acute gastroenteritis. It is infected all the year round and has a high incidence in autumn and winter. The main symptoms include nausea, vomiting, diarrhea, etc. patients often feel that the condition is very serious, and even severe vomiting can be repeated within a day; some people also have headache, fever, muscle pain and other symptoms. Norovirus infection is self limited, the general course of disease is 2 to 3 days.


What are the symptoms of norovirus?

Infected with norovirus, infectious diarrhea, acute gastroenteritis, mainly nausea, vomiting, fever, abdominal pain and diarrhea symptoms, can also have headache, chills and muscle pain. Diarrhea as many as 4 ~ 8 times a day, stool for thin water or water stool, no mucus pus blood.

In the infected population, children had more vomiting symptoms, while adults had more diarrhea.


What are the characteristics of norovirus?

1. Rapid variation

It produces new strains through regular gene recombination accumulation or point mutation, especially rapid mutation, and new mutants appear almost every 2-3 years.

Therefore, the immunity acquired after human infection with norovirus can not produce self-protection in the next transmission of the virus.

2. Strong environmental resistance

Norovirus has strong tolerance to various physical and chemical factors.

No matter incubated at 60 u2103 for 30 minutes, treated with 20% ether at 4 u2103 for 18 hours or exposed to room temperature and pH 2.7 for 3 hours, it still has certain infectivity.

Norovirus is highly infectious and can cause infection every 10-100 virus particles.

Infected patients, latent infection and healthy carriers can be the source of infection.

It is easy to cause mass outbreak in kindergartens, schools, hospitals, communities, hotels, restaurants and other semi closed and crowded environment.

4. The whole population is susceptible

Norovirus can infect people of all ages, but the clinical symptoms of children, the elderly and people with basic diseases may be more serious, in addition, it is easy to cause complications.


The difference between norovirus infection and food poisoning

Some people with norovirus say they are food poisoning or gastrointestinal cold. In fact, any food that is not cooked or processed can be contaminated by norovirus.


There is no specific antiviral drugs for norovirus infection, which is usually self limiting and self-healing. It is generally treated by rehydration therapy, nutritional support treatment and other methods.

Avoid high fever: if you have a fever, you can first reduce the temperature physically and drink a small amount of water many times. If the body temperature is higher than 38.5 u2103 for more than two hours, oral antipyretic drugs should be taken.

Light diet: reduce meat, eggs and other high protein food, and easy to lead to bloating food intake, such as milk, soybean milk, etc.


How to prevent norovirus?

1. Maintain good personal hygiene. In particular, remember to keep your hands clean. Wash hands before handling food or eating and after going to the toilet.

2. Maintain good food hygiene. It includes: selecting safe food raw materials, keeping food handling personnel and utensils clean, thoroughly cooking food (especially shellfish seafood), and storing food at a safe temperature. To prevent norovirus from being transmitted by food.

(function(){( window.slotbydup=window .slotbydup||[]).push({id:u5811557,container:ssp_ 5811557, async:true }In addition, only drink boiled tap water or bottled water from reliable merchants, and avoid drinks of unknown origin. In areas suspected of norovirus infection, skin should also be removed before eating fruits. 3. Maintain good environmental hygiene. Keep the indoor air circulation; isolate the existing infected persons; arrange the uninfected personnel to stay away from the contaminated area; disinfect the infected area thoroughly, and wear gloves and surgical masks. Source: Western Guangdong observation editor: he Yufang_ NN5632

In addition, only drink boiled tap water or bottled water from reliable merchants to avoid drinking drinks of unknown origin. In areas suspected of norovirus infection, skin should also be removed before eating fruits.