How much oral bacteria do you spray on the cake when you blow out the birthday candles?

It is said that the habit of blowing candles on birthdays originated from the ancient Greek period. At that time, the goddess Artemis used the lit candles to decorate the cake. When the candles were blown out, there would be a smoke, and the smoke would rise slowly in the air. The prayers of the believers were passed to God, and later evolved into a habit of wishing to blow a candle.

According to the action of blowing the candle, the meaning is very beautiful. No one thinks this is a problem, but there is a professor at Clapson University in the United States named Paul Dawson. When he gave his daughter a birthday, his daughter blows the candle. Let him think of a problem. If this breath is blown down, will the bacteria in his mouth be blown on the cake?

Realizing this problem, Professor Dawson immediately started experimenting. Instead of using a real cake, the experiment covered the surface of the foam with tin foil and icing sugar. Then they inserted 17 candles on the fake cake. The volunteers all blow out the candles. In order to be true, the volunteers ate pizza before blowing the candles, which fully stimulated the secretion of saliva.

After the candle is blown out, the saliva sample on the tin foil paper is taken out and placed in a petri dish for bacterial culture. The test result is a bit surprising. Although different people blow, the "pollution" effect is different, but on average, the bacteria on the cake The number increased by 14 times after blowing the candle.

Later, the Japanese once again did this experiment, and extended this experiment to the various occasions that often occur in life, such as blowing cold when eating hot fried pork chops, and also concluded that the number of bacteria will increase. So, are we not blowing candles after the birthday? In fact, don't worry too much.

First, there is bacteria in the air, and anything is exposed to the air, even if it is not blowing into it.There will also be bacteria attached to it. Second, the bacteria in human mouth are mostly harmless. Even if the bacteria are spread by blowing candles, the probability of infection is quite low. Even if you do this 100,000 times, the possibility of your illness is still small, because bacteria in human mouth Mostly harmless.

Of course, if you have a cold, or other infectious diseases, Xiaobian recommends that even if you have a birthday, it is best not to blow the candles, otherwise it is really possible to infect others.