Eggs with chicken droppings are original?

In today's world full of genetically modified genes, we all hope to find clues of the original ecology in our lives. Therefore, "organic", "pollution-free" and "green" are often seen in newspapers.

When we choose eggs, we will also be warned by our mother: remember to shake it and listen to it. The most important thing is to see that the eggs are stained with shit. They are farm eggs.

But for example, Tencent reported that "the Beijing APEC menu has to be sterilized before the egg shell can enter the kitchen": "however, a reporter from Beiqing Daily found a strange processing room: the egg white bathroom." It turns out that the eggs here should be washed and sterilized before entering the kitchen to prevent bird flu. "

It can be very confusing: isn't it said that washing eggs will destroy the gelatinous protective substance on the surface of eggs, so it is not conducive to the preservation of eggs? In fact, whether eggs should be washed or not is really a controversial topic.

What exactly does the surface of an egg contain?

Eggshell surface has feed, feathers, feces powder, often with E. coli and other pathogenic microorganisms, affecting and threatening human health. At present, the popular method to ensure the safety of eggs in the world is to clean and dry the eggs, disinfect them, and apply film to prevent fouling.

The total number of colonies, coliform bacteria and salmonella were used as the main detection indexes to determine the degree of microbial contamination on the surface of fresh eggs produced by large and small chicken farms. The total number of bacteria on the surface of fresh eggs in small chicken farms is 2.4 × 10 ~ 5 ~ 8.1 × 105cfu/ (fresh egg surface, the same below), and the number of coliform bacteria is 3.4 × 10 ~ 3 ~ 7.4 × 10 ~ 4 /, and no salmonella is detected; the total number of bacteria on the surface of fresh eggs in large chicken farms is 2.1 × 10 ~ 5 ~ 7.0 × 105cfu/, and the number of coliform bacteria is 1.8 × 10 ~ 3 ~ 1.2 × 10 ~ 4 /, no salmonella is detected.

Is there a gelatinous protective substance on the surface of the egg?

Some, fresh eggs are living organisms, there is a layer of gelatinous material eggshell membrane on the surface of the eggshell, which can play a protective role. There is also a lysozyme in the egg, which can resist the invasion of bacteria and kill the bacteria outside into the human egg. However, in the process of storage, eggs are often affected by external temperature, humidity, storage methods and storage time, which may spoil and cannot be eaten.

However, we do not know how much protection the gelatinous substance on the surface of the egg brings.

National eggs & foreign eggs are treated in different ways

If you are in the United States, you will find that the government and other relevant organizations generally do not advise consumers to wash eggs bought from the supermarket, not because the above mentioned is not conducive to the preservation of eggs, but because the eggs have already been washed. The USDA requires that all eggs sold directly to consumers on farms need to be thoroughly cleaned to remove dirt from the surface before they are packaged and put on the market, so eggs bought in American supermarkets are generally very clean.

The right way to handle eggs?

● if you buy eggs with their own packaging, it is best to leave the eggs in the original package and put them in the refrigerator. This is because the egg shell has many tiny holes, so that the egg is easy to absorb the smell from other foods, and the box can effectively prevent the smell from entering the egg. At the same time, if the effective date is printed on the package, it can also remind you not to eat out of date.

● before and after processing eggs or food containing eggs in the kitchen, wash hands, cutlery, cutting boards and other work surfaces with warm soapy water to avoid cross-infection.

● cooked eggs or food containing eggs should be eaten as soon as possible. If there is any surplus, they should be refrigerated as soon as possible. Cooked eggs or foods containing eggs should not be stored in the refrigerator for more than a week and should be reheated before continuing to eat.

In short, make sure the eggs are clean before eating to prevent bacteria from entering the mouth. Why not take one more step?