Early symptoms of anisakiasis?

summary

Anisakiasis is a very strange disease for many of us. We can't get the relevant information from the medical name of anisakiasis. In fact, this disease is a more frequent parasitic disease in our daily life. This kind of anisakid nematode is mainly parasitic in fish. People in many coastal areas will cause this disease because they often eat fish products. We should pay more attention to this. We'll talk about the early symptoms of anisakiasis.

Early symptoms of anisakiasis?

The first is that the severity of symptoms is closely related to the number of infected insects, parasite location and duration. Anisakis larvae can parasitize in the throat, stomach and intestinal mucosa, but the stomach is the most common, about twice as much as the intestine. Anisakiasis of stomach was most reported in Japan (97.3%). The incubation period is generally 2-20 hours. According to the Japanese report, the shortest time from eating raw fish fillets to the onset of the disease is 30 minutes and the longest is 168 hours. 64% of the patients developed within 3-8 hours and 88% within 12 hours. The incubation period of anisakiasis is long, and it usually occurs 1-5 days after eating fish fillets.

Second, it can be divided into acute type and chronic type. The former is Arthus type allergic inflammation caused by reinfection; The latter is a limited allergic reaction caused by the first infection. More than 85% of the larvae live in the body and corner of the stomach. The clinical manifestations were epigastric pain or colic, recurrent attacks, often accompanied by nausea and vomiting; A few have lower abdominal pain. Occasional diarrhea. In 70% patients, occult blood in stool was positive, and eosinophils in peripheral blood increased significantly.

Thirdly, the ratio of male to female is about 1.8 ∶ 1. The patients aged 10-39 years old are the main ones. The lesions are located in duodenum, jejunum, ileum, cecum, appendix and rectum. Often in 1 to 5 days after eating raw fish, suddenly severe abdominal pain, nausea, vomiting, abdominal distension, low fever, followed by diarrhea, tarry mucus stool, tenderness in the right lower abdomen and umbilical area, sometimes accompanied by urticaria, etc. The patients were often operated on because of intestinal perforation, peritonitis or local intestinal necrosis. The diagnosis was made when the larvae were found in the diseased tissues.

matters needing attention

The above article makes a comprehensive introduction to the clinical manifestations of anisakiasis, which we don't know very well. These related knowledge will greatly help us to resist the occurrence of this disease and lay a solid scientific foundation for us to formulate effective prevention and treatment measures. Of course, in our daily life, we should also pay attention to food safety and hygiene, and pay attention to eating more cooked food and less raw food.