On April 12, media sources reported that Mr. Zhao from Panyu District in Guangzhou was urgently hospitalized due to acute abdominal pain and jaundice. Based on the initial diagnosis and Mr. Zhao’s history of consuming raw fish, doctors suspected a liver fluke infection that led to a blockage in his bile duct.
After a series of tests, doctors performed an endoscopic retrograde cholangiopancreatography (ERCP) on Mr. Zhao and successfully drained his bile duct through a nasal tube. Numerous live worms were observed in the extracted fluid.
Liver flukes, also known as Clonorchis sinensis, are widely found across China, typically inhabiting freshwater fish. Humans can become infected by consuming raw or undercooked fish contaminated with these parasites.
Adult liver flukes are visible to the naked eye and resemble sunflower seeds. They can infest the liver and bile ducts of humans and various animals, causing clonorchiasis, which is characterized by liver damage and bile duct inflammation.
Doctors warn that the cysts of liver flukes in raw fish sashimi are highly resistant, and common condiments such as soy sauce, mustard, and garlic are ineffective at killing them.
To prevent liver fluke infections, the following measures are recommended:
First, avoid consuming raw or undercooked fish and shellfish. Ensure that the seafood is cooked at temperatures between 90-100°C for at least 15 seconds to effectively kill the parasites.
Second, maintain kitchen hygiene by using separate utensils for raw and cooked foods to prevent cross-contamination. After handling raw fish, thoroughly clean knives and cutting boards, and avoid direct hand contact with cooked foods.
Lastly, people who frequently consume raw fish should regularly undergo liver fluke antibody and stool tests at hospitals. If abnormalities are detected, seek medical treatment promptly. Minor symptoms might be managed with antiparasitic medication under medical supervision, but severe cases like Mr. Zhao’s may require minimally invasive surgery to relieve the obstruction before further treatment can be administered.
