What type of worm is clonorchis sinensis?
Clonorchis sinensis, the Chinese liver fluke, is a liver fluke belonging to the class Trematoda, phylum Platyhelminthes. It infects fish-eating mammals, including humans. In humans, it infects the common bile duct and gall bladder, feeding on bile.
Where do the intestines end in flukes?
After ingestion, the metacercariae excyst in the duodenum and attach to the intestinal wall, where they develop into adult flukes (20-75 mm X 8-20 mm) in approximately 3 months and attach to the intestinal wall of the mammalian hosts.
What disease does clonorchis sinensis cause?
Clonorchiasis is an infectious disease caused by the Chinese liver fluke (Clonorchis sinensis) and two related species. Clonorchiasis is a known risk factor for the development of cholangiocarcinoma, a neoplasm of the biliary system.
What are the symptoms of intestinal flukes?
With heavy infections Fasciolopsis flukes can cause intestinal obstruction, abdominal pain, nausea, vomiting, and fever. Allergic reactions and swelling of the face and legs can also occur — and anemia may be present.
What form of clonorchis sinensis is infective for humans?
The trematode Clonorchis sinensis (Chinese or oriental liver fluke) is an important foodborne pathogen and cause of liver disease in Asia. This appears to be the only species in the genus involved in human infection.
How is clonorchis sinensis transmitted?
How does one become infected with Clonorchis? The eggs of Clonorchis are ingested by freshwater snails. After the eggs hatch, infected snails release microscopic larvae that then enter freshwater fish. People become infected by eating infected raw or undercooked fish containing the larvae.
What are flukes in poop?
A liver fluke is a parasitic worm. Infections in humans usually occur after eating contaminated raw or undercooked freshwater fish or watercress. After liver flukes have been ingested, they travel from your intestines to your bile ducts in your liver where they then live and grow.
What do flukes do to humans?
Liver flukes infect the liver, gallbladder, and bile duct in humans. While most infected persons do not show any symptoms, infections that last a long time can result in severe symptoms and serious illness. Untreated, infections may persist for up to 25–30 years, the lifespan of the parasite.
How does clonorchis sinensis affect humans?
Parasites – Clonorchis Liver flukes infect the liver, gallbladder, and bile duct in humans. While most infected persons do not show any symptoms, infections that last a long time can result in severe symptoms and serious illness. Untreated, infections may persist for up to 25–30 years, the lifespan of the parasite.
How is clonorchis diagnosed?
Ova and parasite (O&P) stool examinations for liver fluke eggs is the only available way to diagnose Clonorchis infection. More than one stool sample may be needed to identify the eggs.
Can you see flukes in stool?
Doctors diagnose Clonorchis, Opisthorchis, or Fasciola infections when they see fluke eggs in a person’s stool (feces) or in the contents of the person’s intestines. However, finding eggs in stool may be difficult.
How is clonorchis sinensis most likely transmitted to humans?
The eggs of Clonorchis are ingested by freshwater snails. After the eggs hatch, infected snails release microscopic larvae that then enter freshwater fish. People become infected by eating infected raw or undercooked fish containing the larvae.
What kind of disease does Clonorchis sinensis cause?
The trematode Clonorchis sinensis (Chinese or oriental liver fluke) is an important foodborne pathogen and cause of liver disease in Asia. This appears to be the only species in the genus involved in human infection. Clonorchis sinensis eggs are discharged in the biliary ducts and in the stool in an embryonated state .
Where are the eggs of Clonorchis sinensis discharged?
Clonorchis sinensis eggs are discharged in the biliary ducts and in the stool in an embryonated state . Eggs are ingested by a suitable snail intermediate host .
How is the cercariae of C.sinensis different from other flukes?
The mature cercariae bore out of the snail body into the freshwater environment. However, they are nonfeeding and must find a fish host within 2–3 days, otherwise they die. The cercariae of C. sinensis are different from those of other flukes in that they do not swim.
How does Clonorchis get into the human body?
Clonorchis is a liver fluke parasite that humans can get by eating raw or undercooked fish, crabs, or crayfish from areas where the parasite is found. Found across parts of Asia, Clonorchis is also known as the Chinese or oriental liver fluke. Liver flukes infect the liver, gallbladder, and bile duct in humans.