“Please parents pay attention to Norovirus infectious diarrhea caused by gastrointestinal diseases, acute onset, rapid spread, wide spread, hepatitis B in all age groups, children in the elderly are high-risk population, the main symptoms of nausea, vomiting, abdominal Painful pain..." In the past two weeks, many parents of kindergartens across the country have received reminders from teachers about the prevention of norovirus diarrhea. Norovirus infectious diarrhea is prevalent throughout the world, and infection can occur throughout the year. The infection is mainly among adults and school-age children, with high incidence in the cold season. In the United States, 60-90% of all non-bacterial diarrheal outbreaks are caused by norovirus. The developed countries such as the Netherlands, the United Kingdom, Japan, and Australia have similar results. Among children with diarrhea below the age of 5 in China, the detection rate of norovirus was about 15%. Serum antibody level surveys showed that norovirus infection was also common in Chinese population. "Norovirus" infectious diarrhea is a self-limited disease, there is no vaccine and special drugs, the public do a good job of personal hygiene, food hygiene and drinking water hygiene is the key to preventing this disease, we must develop hand washing, drinking raw water, raw Separate cooked foods to avoid cross-contamination and other healthy lifestyles. Norovirus is a common pathogen that causes infectious diarrhea. It occurs in winter and spring, and it is the high incidence of norovirus. This year, the number of cases of infectious diarrhea is slightly higher than that of last year. It is caused by rotavirus and norovirus that cause infectious diarrhea. Norovirus is the dominant virus. Within 48 hours after infection with Norovirus, the patient will experience symptoms of acute gastroenteritis such as vomiting and diarrhea. Norovirus can be transmitted through the consumption of food contaminated with the virus, and can also be transmitted through direct contact with the infected and contaminated surfaces. In addition, it can also be transmitted through aerosol particles, which can easily cause outbreaks in schools, kindergartens, nursing homes, restaurants, hospitals, factories, and communities. It is worth noting that both children and adults are susceptible to Norovirus, with vomiting predominant in children and more common in adults. The incubation period is mostly 24 to 48 hours, the shortest 12 hours and the longest 72 hours. The incidence of sudden infection, the main symptoms of nausea, vomiting, fever, abdominal pain and diarrhea. Vomiting is common in children, adult patients have more diarrhea, 4 to 8 times within 24 hours of diarrhea, faeces or dilute watery stool, no mucus pus and blood. Routine microscopic examination of the stool WBC<15, no RBC. Patients with primary infection had significantly more vomiting symptoms than those who continued to afflict, and some infected individuals only showed symptoms of vomiting. In addition, symptoms such as headaches, chills, and muscle pain can also be seen. Dehydration can occur in severe cases. Norovirus causes gastrointestinal infections. The main symptoms are nausea, vomiting, abdominal spastic diarrhea, which usually lasts 1-2 days. Symptoms usually appear 12 to 48 hours after infection. "Norovirus" infectious diarrhea is a self-limiting disease. At present, there are no vaccines or special drugs. Public health, food hygiene, and drinking water hygiene are the key to prevent this disease. We must develop hand washing and drinking water. Separate raw and cooked foods to avoid cross-contamination and other healthy living habits. If symptoms of vomiting or diarrhoea occur, it is recommended not to stick to school or work. In particular, food workers and close contacts of patients should pay attention to their health status within 48 hours of contact so as not to spread more people. There are no specific antiviral drugs, mainly symptomatic or supportive treatment, generally do not need to use antibiotics, the prognosis is good. Dehydration is a major threat to Norovirus infectious diarrhea. In severe cases, especially young children and infirm persons, timely infusion or oral rehydration should be performed to correct dehydration, acidosis and electrolyte imbalance. To prevent Norovirus, first wash your hands frequently, especially before eating and before cooking, and after going to the toilet. Remember to wash your hands thoroughly with soap and water, followed by cleansing fruits and vegetables, fruits, and raw food. Vegetables must be carefully cleaned before eating. Fruits are also best peeled before eating. The food must be cooked and thoroughly cooked, especially seafood such as oysters. 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