Crabs are different from fish. Even if the fish dies, as long as the meat quality has not deteriorated, it can still be eaten under normal circumstances. But crabs are completely different. It is an omnivore, and likes to eat rotting animal and plant carcasses. There are a lot of bacteria and viruses on the carcasses. The metabolism of live crabs can compete with microorganisms and inhibit their reproduction; After the death of crabs, microorganisms will use their rich nutrients to multiply rapidly, so that crabs will rot and produce a variety of toxins. People may cause fever, vomiting, abdominal pain, diarrhea and other food poisoning symptoms after eating.
In addition, crab meat also contains a histidine, which turns into histamine after the crab dies. Histamine is a sensitizing substance, which can dilate blood vessels, causing allergic symptoms such as hyperemia and edema of skin and mucosa, urticaria, nasal congestion, runny nose, bronchial asthma, nausea and vomiting, abdominal pain and diarrhea, and in severe cases, circulatory failure may occur. This kind of histamine and toxin will be produced when crabs are dying or just dying, so don't think that crabs can eat before they die or just die.
Experts remind that everyone should not eat drunken crabs and crabs of unknown origin except dead crabs.
Question 2: How long will the crab die? Sea crabs can be eaten as long as they don't go bad, but dead hairy crabs can't be eaten. Sometimes when the hairy crab is still and bubbling, you can move its eyes. When the eyes are still, you can catch it and see if its feet are drooping. We call it a leg crab, which is usually dead at this time. There is another way to make a final judgment, that is, to uncover its shell a little and see if its center of the back is still beating. If you don't even play, please discard it decisively! ! !
Adopt it
Question 3: Can crabs still be eaten after they have just died? Sea crabs are usually eaten to death (if caught in the sea, they will die). Now the aquaculture industry is developed, so there are live sea crabs. So there's nothing wrong with that. Fresh just after death, it's delicious to steam immediately. If you don't like it, you can cook it with salt or garlic.
The crab is dead and can't be eaten.
Question 4: How many dead hairy crabs were found last night today? Are they still edible? Unfortunately, hairy crabs that have just died or are already dead can't be eaten. This is because when the crab is dying or dying, the oxygen acid in the crab will decompose to produce histamine. Histamine is a toxic substance. With the extension of death time, more and more histamine is accumulated in crabs, and more and more toxic gases are produced. Even if the crab is cooked, this toxin is not easy to be destroyed. Excessive ammonia nitrogen must be excreted from the kidneys, so eating dead hairy crabs is very bad for the kidneys. People who eat dead crabs may have symptoms such as vomiting, abdominal pain and diarrhea.
Even the half-dead "legged crab" is not suitable for eating. The infection rate and degree of metacercaria of Paragonimus larvae in live crabs are very high. Paragonimus parasitizes the lungs, which can cause cough and even hemoptysis. If it invades the brain, it will lead to paralysis.
According to the investigation of experts, the infection rate of paragonimiasis is 20% after eating crabs slightly heated, 55% after eating pickled crabs and drunken crabs, and 7 1% after eating raw crabs. Paragonimus metacercariae is very resistant, and it can be killed in water at 55℃ for 30 minutes or in 20% salt water for 48 hours.
Eating crabs raw may also cause symptoms such as intestinal inflammation, edema and congestion. Therefore, eating steamed crabs is the most hygienic and safe. When cooking crabs, it should be noted that the water should be boiled for at least 20 minutes, and the germs of crab meat can be killed after thorough cooking. One thing is also very important. When eating, you must remove four substances: crab gills, crab hearts, crab stomachs and crab intestines, because they contain bacteria, viruses and sludge.
Question 5: seafood-can crabs still be eaten after buying them? Absolutely edible! The seafood sold in the market is basically dead, and the boatmen are frozen when they catch it, rarely because Haifu is basically caught from the open sea, and it takes several weeks to go back and forth.
Question 6: Can hairy crabs be eaten just after they die? Never eat crabs that have just died or are dying.
It is just the right time to eat crabs in autumn and winter, but experts remind you not to eat crabs that have just died or are about to die.
Crabs are different from fish. Even if the fish dies, as long as the meat quality has not deteriorated, it can still be eaten under normal circumstances. But crabs are completely different. It is an omnivore, and likes to eat rotting animal and plant carcasses. There are a lot of bacteria and viruses on the carcasses. The metabolism of live crabs can compete with microorganisms and inhibit their reproduction; After the death of crabs, microorganisms will use their rich nutrients to multiply rapidly, so that crabs will rot and produce a variety of toxins. People may cause fever, vomiting, abdominal pain, diarrhea and other food poisoning symptoms after eating.
In addition, crab meat also contains a histidine, which turns into histamine after the crab dies. Histamine is a sensitizing substance, which can dilate blood vessels, causing allergic symptoms such as hyperemia and edema of skin and mucosa, urticaria, nasal congestion, runny nose, bronchial asthma, nausea and vomiting, abdominal pain and diarrhea, and in severe cases, circulatory failure may occur. This kind of histamine and toxin will be produced when crabs are dying or just dying, so don't think that crabs can eat before they die or just die.
Experts remind that everyone should not eat drunken crabs and crabs of unknown origin except dead crabs.
Many people think that drunken crabs can be sterilized and eaten raw after being soaked in high-alcohol liquor. However, crabs living in streams and stone beaches are likely to carry a parasite called metacercariae. Alcohol in wine can't kill parasites. If you eat drunken crabs raw, parasites will enter the human body and reach the lungs through the intestines in the abdominal cavity. In severe cases, it can parasitize the brain, liver and other organs, causing organ cysts.
There are also some unscrupulous traders who soak ordinary rice crabs with "crab washing powder" to pretend to be high-priced Yangcheng Lake hairy crabs. These "crab powder washing" have the same principle as the "shrimp powder washing" discussed earlier. The main component is oxalic acid, which has a strong corrosive effect and can also cause urinary calculi.
Besides, some people can't eat crabs-
People with hyperlipidemia and coronary heart disease. The cholesterol content of crabs is high, so it is impossible for human body to consume more than 300mg of cholesterol a day, while the cholesterol content of100g of crab roe is as high as 460mg, and eating more than two crabs will exceed the standard.
Patients with digestive system diseases such as gallstones, pancreatitis and active hepatitis. Crab has a high content of protein, which can promote the secretion of pancreatic juice after eating and easily induce digestive tract diseases;
Gout patients, crabs belong to high purine food, which will aggravate the condition of gout patients; People with allergies, food allergies, protein allergies and asthma can't eat lake crab;
For people who have a cold and fever, Chinese medicine believes that eating more crabs will cause wind and accumulate cold, which will aggravate the cold condition;
Babies, crab roe and crab paste are the reproductive system and cells of crabs, which contain a lot of sex hormones. Eating too much may lead to precocious puberty in children.
Question 7: The hairy crab I bought last night died today. Can I still eat? Hairy crabs can be eaten after they have just died. Hairy crabs are rich in protein. If they die for too long, protein will deteriorate, which is harmful to health. You can smell it, especially eggs. If there is, don't eat it.
Question 8: The crab I bought yesterday afternoon died this morning. Can I still eat? Eating is edible, but it is not very fresh, and the meat is not as delicious as it was when it was alive.
Question 9: Can crabs be eaten after they die in the process of cleaning? It is best not to eat crabs when they are dead. People are easily poisoned by crabs, which is very painful.
Question 10: How long can crabs be kept? How long can you die without eating? Tie it up and put it in the fresh-keeping room of the refrigerator (not frozen) for more than 10 days. Don't leave it for too long, it will consume nutrition. It's best not to eat dead seafood, it's bad for your stomach. If crabs die for a long time and smell stale and smelly, they can't be eaten. Usually buy fresh crabs, cook them first and keep them in the refrigerator. Never put raw crabs in the refrigerator, because then the meat in the crabs will be gone.