Anisakiasis

Anisakiasis: Anisakis L3 larvae in GI tract; raw marine fish. Japan/West; acute: nausea/vomiting/severe abdominal pain/eosinophilia; chronic: eosinophilic gastric/intestinal granuloma; obstruction/perforation/peritonitis.

Common Symptoms

Intestinal perforation; granuloma; diarrhea; abdominal distension; epigastric pain; mucous stool; abdominal pain; low fever; nausea; belching

Causes and Pathogenesis

Anisakidae: 4 genera (Anisakis/Pseudoterranova/Contracaecum/Hysterothylacium). Adult in marine mammals; eggs in sea water; L1-L2 (230 µm) → copepod (1st IH) → fish/squid (2nd IH) → marine mammal. Human = accidental host; larvae die in 2-3 weeks. Resistant to NaCl (96-233 h), spirits, vinegar, garlic, soy sauce; -18°C 48 h / -20°C 2 h kills; 60°C kills. Pathology: Type I-IV (phlegmonous/abscess/abscess-granuloma/granuloma); eosinophilic abscess/granuloma; wall thickening 2-3×.

Treatment

Drug therapy, supportive therapy

Preventive Measures

No raw fish; cook thoroughly; freeze -20°C 24 h; import inspection.

Department to Visit

It is recommended to visit the Gastroenterology department; an appointment can be booked on this platform before the visit.

Warm reminder: The above information is for health science reference only and cannot replace professional medical diagnosis. If you have related symptoms, please seek medical attention at a regular hospital promptly.