Many people regard the refrigerator as a "food disinfection cabinet" at home, and think that the food stored in the refrigerator is hygienic. In fact, the refrigerator does not clean often because it stores food for a long time, and it will breed many bacteria.

Dr. MacKon Conan Doyle, director of the Center for Food Safety at the University of Georgia in the United States, suggested that although the food in the refrigerator looks fresh, it has actually deteriorated. Storage time for cooked meat in the refrigerator should not exceed 4 days.

The common refrigerating temperature for preserving food in refrigerators is 4 to 8 ° C. In this environment, most bacteria grow at a slower rate. However, some bacteria are psychrophilic. For example, Yersinia and Listeria can grow rapidly at this temperature. If you eat foods infected with such bacteria, it will cause intestinal diseases.

In the freezer of the refrigerator, the temperature is generally around minus 18 ° C. At this temperature, the bacteria are generally inhibited or killed, so the food stored here has a better preservation effect. However, freezing does not mean that it can be completely sterilized, and some bacteria with strong anti-freezing ability will survive. For example: Mycobacterium tuberculosis, typhoid bacillus, etc., the tuberculosis bacteria and typhoid bacillus are placed in liquid air at minus 193 ° C and liquid hydrogen at minus 250 ° C, they are not frozen. Therefore, it is said that Mycobacterium tuberculosis and typhoid bacillus are "freezing bacteria". Most microorganisms have strong resistance to low temperatures. Therefore, although the frozen food can be preserved for a longer period of time, the microorganisms of the food do not die, and once the temperature rises, they will continue to grow and multiply. Therefore, the food preserved in the refrigerator must be returned to the pot before consumption, otherwise it will cause intestinal infectious diseases and even food poisoning.

So from another perspective, if the refrigerator is not disinfected often, it will become a "hotbed" for some bacteria.

The storage time of any food in the refrigerator should not be too long. It is best to buy it with the purchase. Because the storage time is too long, it will affect the deliciousness of the food and the odor. There are also some fruits, such as bananas, apples, etc., if they are long-lasting, they are prone to deterioration. Once they are degraded, they will emit a harmful gas.

Do not store too much food in the refrigerator, which will cause the external temperature of the food to be low and the internal temperature to be high.

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