Never eat the opened long time stored watermelon

During the hot summer time, many people like to eat iced watermelon, and will store the not eating up watermelon in the refrigerator, and then eat later. However, this may brings great pain for your family.

Watermelon bacterial number calculated billion overnight

Watermelon is one of the hot popular fruit in the hot summer, most time a big watermelon cut open and cannot eat up for one time, so the problem is coming: after a few hours, or one night, the left watermelon can be eaten? After do survey on many people, summarizing approximately three answer reporters: A directly to eat, no problem; B cannot eat, direct throw away; C cut surface layer. So what is the best choice? Through the following experiment to tell you the answer.

Never eat the opened long time stored watermelon

In June 10th 8 pm, reporters took out one watermelon, cut in half and then wrap on the dining table. Presumably this is the normal way for most people.

On June 11th 7 AM, the reporter found that the watermelon looks normal but just the surface a little dry over one night time. At 8 AM, the reporter take the half watermelon to Medical University hospital microbiology laboratory, and the staff will do the test to have a look what happens to the watermelon after one night.

Never eat the opened long time stored watermelon

The staff take the surface, 4 cm below the surface, 8 cm under the surface samples each 1 grams, mash into the culture medium, respectively marked 1, 2, 3, put into the incubator. 12 hours later, shocking thing happened.

The reporter saw in the laboratory, No. 1 is full of distribution of bacteria group, even the staff also surprised, they said the bacteria which have been difficult to count and need to calculate the billion units; No. 2 bacteria group is slightly less than No. 1; and the bacteria in No. 3 is also difficult to calculate. Now you can image that there will be how much bacteria within the watermelon totally.

Never eat the opened long time stored watermelon

Observed under microscope, these bacteria are Gram-negative bacilli and gram-positive cocci, although can’t been seen with the naked eye, but the fact is that the trillions of bacteria has been through into the deep watermelon. That is to say, watermelon looks good from the surface, in fact it has almost been bacteria occupied.

So just throw it away without any hesitation.

Never eat the opened long time stored watermelon


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