Mr. Zhao, who lives in Panyu District, Guangzhou, was rushed to the hospital with sudden, severe abdominal pain and yellowing of his eyes. Subsequently, after the doctor's consultation and examination, it was found that he was infected with liver flukes due to his long-term consumption of sashimi, which caused a series of symptoms after the liver flukes blocked the bile ducts.
The doctor performed nasobiliary drainage for Mr. Zhao, and dozens of melon-seed-like "live worms" were drained, some of which were even moving. After this battle, Mr. Zhao said that he would never eat undercooked seafood and river fresh food in the future.
Coincidentally, a patient in Changsha also had symptoms such as low-grade fever, abdominal pain, and diarrhea due to his love of eating yusheng, and was finally diagnosed with liver fluke disease after visiting the hospital.
Clonorchis sinensis, a liver fluke, is an adult worm that lives in the human hepatobiliary duct, and its presence leads to the appearance of liver fluke. Guangdong, Guangxi, Heilongjiang and other places are the main endemic areas of liver fluke disease in China, although sporadic cases have been reported in many other provinces. The World Health Organization's International Agency for Research on Cancer (IARC) has classified liver flukes as a Group I carcinogen, indicating that they pose a serious threat to human health.
In mainland China, there are 112 species of freshwater fish hosts, the most common of which include grass carp, herring, carp, silver carp, bighead carp, dace, crucian carp and wheat earfish. In addition, freshwater shrimp are also one of the hosts of liver flukes, such as the slender-footed rice shrimp and the Chinese long-arm shrimp.
When a person eats unhygienic or undercooked raw fish and shrimp, the cysts of liver flukes can silently enter the body. Later, stimulated by digestive juices, the larvae in the cysts will come out of the cyst and enter the common bile duct and intrahepatic bile duct. It develops into an adult worm after about a month and may survive in the human body for decades. The excreta of liver flukes contains carcinogens, which increase the risk of cholangiocarcinoma.
The severity of clinical symptoms of liver flukes is related to the number of infections. If the number of infections is small, most of them are epigastric discomfort, poor appetite, greasy aversion, indigestion, abdominal pain, diarrhea, and vague pain in the liver area. Severe infections may include weight loss, edema, upper gastrointestinal bleeding, anemia, and even hepatic encephalopathy, cirrhosis, and liver cancer.
Some doctors reminded that the soy sauce, mustard, ginger, onion and garlic used when eating raw fish cannot kill cysts, because the cysts carried by sashimi have strong resistance. In addition, if knives, cutting boards, or pots are used to treat meat dishes that have been contaminated with fish and shrimp with liver fluke cysts, these meat dishes may also be contaminated.
Therefore, to prevent liver flukes, it is important to pay attention to:
1. Do not eat uncooked river fresh and seafood, and aquatic products should be thoroughly heated and cooked before eating.
2. The utensils for handling raw and cooked ingredients should be separated, and hand hygiene should be paid attention to, and the cooked food should not be touched with your hands after handling fish and shrimp.
3. If there is a history of eating fish and abnormal symptoms, you should seek medical attention in time and carry out deworming treatment as soon as possible.
In addition to parasites, eating raw seafood can also be infected with bacteria and viruses. Seafood carries a variety of bacteria and viruses, such as Vibrio parahaemolyticus, bacterial enteritis, viral enteritis and so on after human infection. In addition, some seafood contains toxins, such as shellfish, which may be poisoned when eaten raw, causing headaches, muscle pain, visual or hearing abnormalities, speech difficulties, etc.
epilogue
Everyone should pay attention to food hygiene and safety on weekdays, and also pay attention to personal hygiene to reduce the risk of disease.
Resources:
[1] Dozens of "live worms" were drained out at one time! A neighborhood in Panyu was infected with "liver flukes" because of their love of eating yusheng
[2] He was diagnosed with liver fluke after developing low-grade fever and diarrhea, how to avoid infection in his daily diet?
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