Have you eaten 'dangerous melons' in summer? In hot and humid summers, food can become a fertile medium for bacteria at any time. Every summer, there are many cases of diarrhea caused by "eating poorly", both adults and children, often mistaken for eating too "cold". In fact, low-temperature food or beverages do indeed cause some friends to have faster intestinal peristalsis, but generally do not cause people to run to the restroom several times a day. So, when there is a significant change in the characteristics of stool (commonly known as "diarrhea"), the first consideration should be given to intestinal infections caused by food hygiene. The refrigerator is not a safe box to guard against the "invasion" of Listeria monocytogenes. There are many kinds of food and drinks stored in the refrigerator. Among them, there are many kinds of food that "inject bacteria" into the refrigerator, such as eggs that may carry Salmonella, and raw meat, fruits and vegetables that may carry pathogenic Escherichia coli, pathogenic Staphylococcus aureus and parasites. In addition, it is easy to host a very lethal "dangerous molecule" - Listeria monocytogenes in the refrigerator. They like cool and even cold environments. The refrigerator is a safe haven for them, so it has the nickname of "refrigerator killer". In a low temperature environment of 2 ℃ -8 ℃ that can make us shiver, they can still grow and reproduce happily, and contaminate foods such as leftover food, cut "cut" fruits and vegetables (including purchased homemade salads), bean sprouts, soft cheese, cold cut cooked food that has been left for a slightly longer time after opening, milk that has been left for a long time after opening, smoked fish, shrimp, and aquatic products. The most vulnerable groups to Listeria monocytogenes are those with relatively weak disease resistance, including newborns, the elderly, pregnant women, and people with immune deficiency. The infection caused by it can cause meningitis, sepsis, Endocarditis, abortion of pregnant women, and even stillbirth of pregnant women. Fruits with low organic acid content are easily targeted. Why is it necessary to talk to everyone about how to eat melons safely in summer? The main topic is not only watermelon, but also melon and papaya - because they are fruits with low organic acid content and are easily coveted and attacked by annoying pathogenic bacteria. Taking sliced watermelons as an example, we often think that by covering the flesh with cling film and storing it in the refrigerator, we can definitely "keep it fresh" without any problems. In fact, there are still risk factors that may lead to infection throughout the entire process from buying melons to processing and preservation. Some scholars have conducted experiments on melons (including watermelon, melon, Hami melon and papaya) with low organic acid content. They "inoculated" a certain amount of Listeria monocytogenes and Salmonella on the flesh of these melons obtained under sterilization conditions, and cultured them at different temperatures and at different times to observe the reproduction of these two bacteria on the flesh of these melons. The final conclusion is: Salmonella: the higher the temperature and the longer the time, the more the number of Listeria monocytogenes; the lower the temperature and the longer the time, the more the number of reproduction. Read about it, do you think the stomach and back bone of the iced watermelon just tasted are cold? Don't be nervous, this is not to create panic, but to remind everyone: the environment is not sterile, and food hygiene and safety cannot be ignored