8,400 bacteria?Can I still eat watermelon overnight?You know you all →

Every summer, the problems about the watermelon that can be eaten overnight will be taken out and discussed, and the relevant news once rushed to the hot search.

Can I eat watermelon overnight? In fact, whether watermelon is not the main problem overnight, the key is whether there are pathogenic bacteria. A good and complete watermelon, which is basically sterile inside. But the cut watermelon does not have the protection of the melon skin. Even if it is refrigerated in the refrigerator, the number of colonies will still rise. This is a very normal natural phenomenon.

We can't be too strict with watermelon, it's just a melon.

Scientific staff experimented with the cut watermelon

● Use a special cutting board and kitchen knife, refrigerate the refrigerator for 24 hours. The experimental results show that only 45 bacteria are detected every 25g of watermelon.

● When the staff switched to the cutting board and knife to cut watermelon (for 24 hours), the experimental results were displayed as: 8,400 bacteria were detected every 25g of watermelon! (The editor who never changed the chopping board and the knife when cutting the cutting board and the knife.

Studies have shown that if you use clean tools, cutting board cut melons, and timely wrapped in clean plastic wrap and put in the refrigerator in time, it is not easy to cause pathogenic bacteria, and you can rest assured even if you put it overnight.

Why do you sometimes have diarrhea after eating watermelon overnight? In fact, this is caused by a large number of "pathogenic bacteria" breeding

Whether it will cause harm to the human body depends on whether there is pathogenic bacteria on watermelon. Such as common Salmonella, Golden Polygium, Liszt bacteria and so on. For details, please poke → be vigilant! Be careful of "Liszt bacteria" in the summer refrigerator!

Experts said that if they are not polluted by pathogenic bacteria, they can be eaten with confidence even if they do not cut off the surface. But if it is contaminated by pathogenic bacteria, even if you cut off the surface of the watermelon, you may still make people sick.

What is the concept of a colonial number of 42000?

After the view of "8400 bacteria" was circulated, some evaluation agencies also tested to test the total number of colonies on the watermelon overnight watermelon of 42000 CFU/G. Is it more scary?

In fact, sometimes the huge number may not be so terrible. Take the cold drinks that are also hot in summer as an example. The limited standard for the total number of colonies in cold drinks in the national standard is as follows:

The national standard regulations must take 5 different parallel samples. Among them, the total number of colonies with a maximum of 2 samples is between 25,000 and 100,000, while other samples must be less than 25,000. In other words, when you eat cold drinks that fully meet national standards and strictly control the factories, the total number of colonies may be more than 42,000.

Looking at it now, does the total number of colonies on the watermelon feel that the total number of colonies is not so scary?

The correct way to open watermelon: Although bacteria are everywhere, good hygiene habits can avoid disease from the mouth. In order to minimize the risk of watermelon dyeing pathogenic bacteria in mind:

1. Buy fresh and complete watermelon, it is recommended that you try not to buy the cut watermelon, because I don't know how much time has been stored.

2. Using clean melon jets, if the fruit knife and cutting board are contaminated by bacteria, it will also affect the quality of watermelon. It is best to use a special fruit knife, try not to mix with the cutting knife; make the knife and cutting board clean when cutting watermelon, and repeat the knife with boiling water before cut melon.

3. Do not store at room temperature for more than 4 hours. Under the high temperature environment, whether or not or not to protect the plastic wrap, it will breed a large amount of bacteria in about 6 hours. Without 4 hours of bacteria, the amount of bacteria is less.

4. Refrigeration preservation is particular. In order to prevent the cross -pollution and skewers of ingredients, the use of plastic wrap is a good means. However, if there is space to store watermelon separately in the refrigerator, it will not cause skewers and will not cause water loss. It is not recommended to cover the plastic wrap. It is best not to exceed 24 hours.

Remember these tips above, you can rest assured to eat melon this summer!

Source: News Workshop, Shanghai Consumer Protection Commission, Nanjing Market Supervision, Foshan Market Supervision

Edit: Zhang Zhulin

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