Frying small yellow croakers can kill Anisakis nematodes.

Anisakis has strong tolerance to the external environment. Research shows that Anisakis has certain resistance to alcohol, salt, radiation, etc., but its resistance to temperature is extremely weak. Generally, it can only survive for 3 hours at -20℃. It survives for 4 days at -10℃, 69min at 45℃, and only survives for a moment at 70℃.

Anisakis is a type of nematode whose adult worms parasitize the digestive tracts of marine mammals such as whales, dolphins, and seals, and whose larvae parasitize marine fish. It is distributed worldwide. Infection into the human body can cause visceral larvae migrans and cause anisakiasis.

The bodies of Anisakis parasitizing the human body are all third-stage larvae. The larvae are spindle-shaped, colorless and transparent, and the body length is 12.5~30mm. Humans are not a suitable host for Anisakis, but the larvae can parasitize various parts of the human digestive tract. Humans become infected by ingesting marine fish and marine molluscs containing live Anisakis larvae.

Symptoms of Anisakis disease:

After human beings are infected with larvae, mild cases only have gastrointestinal discomfort, and severe cases show sudden severe pain in the upper abdomen a few hours after eating. Nausea, vomiting, or symptoms such as lower abdominal pain, bloating, and diarrhea a few days later. Fiberoptic gastroscopy shows gastric mucosal edema, bleeding, erosion, and ulcers. In advanced patients, tumor-like objects can be seen on the gastrointestinal wall.

The pathological characteristics are abscesses or tumor-like masses centered on the submucosa, accompanied by a large number of eosinophilic infiltrates. In the tumors, worms or their fragments, cuticles or intestinal tubes can be seen. In addition to the gastrointestinal tract, worms can also form tumors in the abdominal cavity, urinary system, subcutaneous tissue, etc. The patient's onset is sudden and resembles a surgical acute abdomen, which often leads to clinical misdiagnosis. It needs to be differentially diagnosed with acute appendicitis, duodenal ulcer and other diseases.

Reference for the above content: Baidu Encyclopedia—Anisakis