What happens if a crab dies and eats it, can a crab still eat it when it dies, and why?

1.Crabs are different from fish, even if the fish is dead, as long as the meat has not deteriorated, it can still be eaten under normal circumstances. But the crab is completely different, it is an omnivore that likes to eat the rotting carcasses of animals and plants, with a large number of bacteria and viruses.

The metabolism of live crabs can compete with microorganisms and inhibit their reproduction; After the crab dies, the microorganisms will use its rich nutrients to multiply rapidly, causing the crab to spoil and produce a variety of toxins. Food poisoning symptoms such as fever, vomiting, abdominal pain, and diarrhea may occur after eating.

2.Crab meat also contains a type of histidine, which turns into histamine when the crab dies. Histamine is a sensitizing substance, which can dilate blood vessels, resulting in allergic symptoms such as **, mucosal congestion and edema, urticaria, nasal congestion, runny nose, bronchial asthma, nausea and vomiting, abdominal pain and diarrhea, and in severe cases, circulatory collapse.

The crab is dying or just dead, and its inhibition capacity decreases, producing this histamine and toxin.

So don't think that crabs are still alive or just dead.

Crabs that have just died are edible. At this time, the number of bacteria in the crab is not very large, and after high-temperature cooking, it can effectively kill the parasites and bacteria in the crab, so as not to cause excessive effects on the human body. However, dead crabs for more than two hours are generally not eaten, and a large number of heat-resistant bacteria are bred in the crab at this time, and they cannot be completely killed after heating for more than 20 minutes, and may cause abdominal pain and diarrhea after ingestion into the human body.

So we try to choose the ones alive for the sake of health, so that there will be no unnecessary harm.

If you die, what happens if you eat it? Crabs are dead, and if you are hungry, you will have diarrhea, and if you are hungry, you will be poisoned, so it is best not to eat crabs that have lost their.

On August 15, chrysanthemum crab fat. The autumn wind rises, and the crab's feet itch; Chrysanthemums bloom, smell crabs. Autumn is a good time to eat crab fingers.

However, because they are not selected or stored improperly, the crabs are already dead when cooking, but they are reluctant to throw them away. So, can you eat a crab when it's dead? How long do crabs die and can't be eaten?

Can you eat a crab when it dies?

Generally speaking, crabs cannot be eaten when they are dead, especially hairy crabs, which cannot be eaten no matter how long they have been dead. But if the crab dies, as long as it is not very long and does not deteriorate, it is still edible. Therefore, when picking crabs, we should try to pick fresh ones, which taste good and are also relatively healthy.

Crab. Why can't crabs be eaten when they die?

First of all, crabs mainly eat dead fish and dead shrimp that are rotten in the water, and crabs breathe with gills, and there are often sludge, weeds and other substances in the gill fissures to stay, therefore, there are many bacteria infected in the body, when the crab is alive, the bacteria can be excreted with the metabolism in the body, once it dies, the bacteria in the body will multiply in large quantities and decompose the crab meat, and some bacteria will produce toxins, so that the crab people are prone to poisoning soon after eating.

Secondly, after the crab** is obtained, it often causes an increase in lactate in the body because it wants to break free, which will cause the bacteria in the body to multiply rapidly and spread to the crab meat after the crab dies. Bacteria will break down amino acids in crabs, and then produce a harmful substance "histamine", causing allergic food poisoning; In addition, the substances that may be produced are "histamine-like", which can cause vomiting, abdominal pain, and diarrhea, so be careful when selecting.

It is generally believed that adults who consume more than 100 mg of histamine can cause allergic phenomena, such as facial flushing, allergies, conjunctival hyperemia and other symptoms, as well as headache, dizziness, frequent pulse, palpitations, thirst, burning throat and swollen lips; Others have numbness in the mouth, tongue and limbs, general weakness and irritability; In more severe cases, asthma, dyspnea, dizziness, and fainting may occur.

Crab. Can you eat freshly dead crabs?

Freshly dead crabs are edible. Although dead crabs will produce some harmful components to the human body, the bacteria of the crabs that have just died have not had time to breed in large quantities, and some components such as cadaveric and histamine have not had time to produce, so the freshly dead crabs are edible.

But if the death time is too long, for example, in the current high temperature of more than 30 degrees, the crab dies for more than four hours, and soaks in unclean water, this situation is not edible.

How can you tell if a crab has just died?

When a crab dies, it loses its original umami. After the crab dies, the intestinal glands will quickly fall apart, and the histidine and digestive enzymes in it will scatter out and decompose the crab meat. Therefore, the taste of dead crabs is strange and the taste is greatly reduced, which is why it is said that "crabs stink before they die".