1 Can dead crabs be eaten?
Dead crabs can't be eaten. Live crabs can excrete bacteria through metabolism in the body, but once the crabs die, the bacteria in their bodies will multiply. One of the bacteria is Proteus, which can decarboxylate protein in human body, thus producing histamine. Histamine accumulates to a certain amount and people will be poisoned if they eat it. The common manifestations are nausea, vomiting, abdominal pain and diarrhea, and in severe cases, dehydration, convulsions and even shock may occur.
What's the harm of eating dead crabs?
Dead crabs taste worse. Crabs contain histidine, which produces histamine and histamine-like substances under the action of decarboxylase. After the crab dies, the intestinal glands will soon fall apart, and the histidine and digestive enzymes inside will decompose the crab meat, so the meat quality of the dead crab will become worse and the taste will be greatly reduced.
Dead crabs are allergic. Histidine contained in crab meat will be converted into histamine after crab death. Histamine is a sensitizing substance, which can cause allergic symptoms such as vasodilation, hyperemia and edema of skin and mucosa, urticaria, nasal congestion, runny nose and bronchial asthma, and even lead to life-threatening respiratory and circulatory failure.
Dead crabs are prone to food poisoning. Crabs are omnivores. They like to eat rotting animals and plant carcasses. These animals and plants contain a lot of bacteria and viruses. When crabs are alive, their metabolism can compete with microorganisms and inhibit bacterial reproduction. After the death of crabs, microorganisms will use their nutrients to multiply rapidly, leading to the deterioration of crabs and excessive toxins. People are prone to diarrhea, abdominal pain, vomiting, fever and other poisoning symptoms after eating.
Three points for attention in eating crabs
After washing the crab and buying it back, wash the dirty things attached to it outside, and then put it in light salt water 1-2 hours to let it spit out the dirty things in its stomach. Change the water twice during the period.
Don't eat dead crabs. Because crab meat contains more histidine, histidine can be decomposed into histamine, which is a toxic substance. And the longer the crab dies, the more histamine it has. Don't eat half-baked crabs. Crabs often carry paragonimiasis and Vibrio parahaemolyticus. If it is not disinfected or killed at high temperature, it may cause paragonimiasis or bacterial food poisoning, which may be life-threatening. It is unscientific to say that "eat crabs raw and shrimp alive".
Don't eat the stomach, intestines, gills and other parts of crabs. Crabs like to eat rotten food. Its stomach, intestines, gills and other parts often contain a lot of bacteria and toxic substances. Therefore, when eating crabs, don't touch these things with your mouth, let alone chew them. You should remove these parts before eating.