Infectious diarrhea is a common disease caused by bacteria, viruses, parasites and other pathogenic microorganisms with diarrhea as the main symptom. Patients have three or more bowel movements per day, mostly watery stools, mucus stools, blood-like stools, etc. In severe cases, there is also secondary dehydration, shock, hemolytic uremic syndrome, etc. In contrast, general intestinal dysfunctional diarrhea has mild symptoms and is self-healing. Recent outbreaks of diarrhea caused by hemorrhagic Escherichia coli (EHEC) in Germany and other countries and regions have resulted in serious complications such as hemolytic uremic syndrome in some patients, and dozens of deaths. This bacterium is more acid-resistant, and can still survive for months in the low temperature environment of the refrigerator, and grows best at 30-42 degrees, but is not resistant to high temperatures. Infection can be caused by cross-contamination of raw and cooked food in processing, impermeable heating, and direct ingestion of food stored in unheated refrigerators. In addition, EHEC can discharge bacteria through animal feces such as cattle and sheep for a long time, and once these feces contaminate food, such as beef and milk, and are not heated thoroughly, they can cause infection in the feeder. In order to prevent the occurrence of intestinal infectious diseases, the public is reminded to pay attention to the following: 1, develop good hygiene habits of “drinking boiled water, eating cooked food and washing hands regularly. 2, try not to go to poor sanitation street stalls, try to eat out less cold dishes and meat barbecue food; 3, pay attention to family food hygiene, food production to heat more than 3 minutes. Try not to eat leftover food. Refrigerator is not a “safe deposit box”, the refrigerator storage of directly imported food, after health treatment before eating. 4, processing of cold dishes, the processor should clean hands, must use a special cooked food board and knives, do not mix with raw meat knives and boards, lettuce in the processing before using boiling water over a bit, serving cold dishes and salad containers to be dedicated. 5, vegetables and fruits should be soaked in water first, then rinse with clean water more than three times, especially some vegetables with leaves and roots, pay special attention to the root cleaning, grapes, strawberries and other fruits need to be soaked in water with a little salt for a few minutes, rinse with water, in the process of rinsing, in the surface with a gentle hand scrubbing. 6. Travelers should pay attention to personal hygiene, try to avoid eating raw and cold food, especially raw vegetables, and avoid contact with animals such as cattle, sheep and deer in the infected area. If diarrhea occurs, seek medical attention in a timely manner. 7. Carry out “three controls and one extermination” (control of water, feces and food, and eradication of flies) to maintain good environmental hygiene and food hygiene.