Dead crabs are poisonous

1, freshly dead or already dead hairy crabs cannot be eaten. This is because when the crab is dying or already dead, the histoxic acid in the crab body will decompose to produce histamine. Histamine is a poisonous substance, with the prolongation of the death time, the crab body accumulates more and more histamine, more and more poisonous, even if the crab is cooked, this toxin is not easy to be destroyed. And excessive ammonia nitrogen must be excreted from the kidneys, so eating dead hairy crabs is very bad for the kidneys. Symptoms such as vomiting, abdominal pain and diarrhea may occur in people who eat dead crabs.

2, even half-dead "foot crabs", should not be eaten. The infection rate and degree of infection of larval cysts of Schistosoma pneumoniae in live crabs is very high, and Schistosoma pneumoniae parasites in the lungs, stimulate or destroy lung tissue, can cause coughing, and even hemoptysis, and if the invasion of the brain, it will cause paralysis.

3, according to experts, the crab slightly heated to eat, schistosoma infection rate of 20%, eat pickled crab and drunken crab, schistosoma infection rate of up to 55%, and raw crab, schistosoma infection rate of up to 71%. The resistance of Schistosoma lungis cysts is very strong, and it is usually necessary to soak in 55℃ water for 30 minutes or pickle in 20% salt water for 48 hours to kill.

4, raw crab may trigger intestinal inflammation, edema and congestion and other symptoms. Therefore, eating steamed and cooked crabs is the most hygienic and safe. Steaming crabs should pay attention to, in the water after boiling at least another 20 minutes, cooked cooked through the crab meat germs may be killed. One thing is also very important to eat must be removed from the crab gills, crab heart, crab stomach, crab intestines four substances, because it contains bacteria, viruses, sludge, etc..