liver flukes in humans
Sophia Aguilar
Updated on July 26, 2026
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.
Can you see liver flukes in poop?
Diagnosis of Fluke Liver Infections
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 are liver flukes diagnosed in humans?
The infection typically is diagnosed by examining stool (fecal) specimens under a microscope. The diagnosis is confirmed if Fasciola eggs are seen. More than one specimen may need to be examined to find the parasite. Certain types of blood tests also may be helpful for diagnosing Fasciola infection.
How do I know if I have liver flukes?
Untreated, infections may persist for up to 25–30 years, the lifespan of the parasite. Typical symptoms include indigestion, abdominal pain, diarrhea, or constipation. In severe cases, abdominal pain, nausea, and diarrhea can occur.
Do I have liver flukes?
Diagnosis of liver fluke infection is made through some of these tests: Blood tests. Doctors can identify liver fluke antibodies (proteins produced by the body to help fight any infection). In other cases, doctors may also check your white blood cell count.
What happens if you leave a parasite untreated?
Often they can go unnoticed, with few symptoms. But many times these infections cause serious illnesses, including seizures, blindness, heart failure, and even death.
How do you get rid of intestinal flukes?
Medical Care. Praziquantel 10-20 mg/kg as a single dose or 25 mg/kg 3 times a day is the recommended treatment for intestinal flukes (including F buski infection). It should be taken with liquids during a meal.
How do I know if I have an intestinal parasite?
Nausea or vomiting. Gas or bloating. Dysentery (loose stools containing blood and mucus) Rash or itching around the rectum or vulva.
Do parasites cause weight gain?
While some parasites don’t cause noticeable symptoms, some grow, reproduce or invade healthy functioning systems, making their hosts sick, resulting in parasitic infection. For instance, some parasites may consume your food and leave you hungry after meals, resulting in an inability to gain weight.
How big is a liver fluke?
The size of the parasite ranges from 8.0 to 15.0 mm long by 1.5 to 4.0 mm wide and 1.0 mm thick (2). Humans are infected when ingesting uncooked fresh water fish infested with metacercariae. The larvae excyst in the stomach, migrate to the ampulla of Vater, ascend into the bile ducts and live there for 20-30 years.
Are liver flukes contagious?
Liver flukes are parasites that can cause disease in humans and some animals. Liver flukes cannot be spread from person to person. Instead, people and animals get infected with liver flukes by eating contaminated fish or drinking contaminated water.
What do flukes look like?
The flukes (Trematoda) are a class of parasitic worms belonging to the phylum Platyhelminthes. The symmetrical body of a fluke is covered with a noncellular cuticle. Most are flattened and leaflike or ribbonlike, although some are stout and circular in cross section.
How do you get rid of fluke worms naturally?
Eat more raw garlic, pumpkin seeds, pomegranates, beets, and carrots, all of which have been used traditionally to kill parasites. In one study, researchers found that a mixture of honey and papaya seeds cleared stools of parasites in 23 out of 30 subjects. Drink a lot of water to help flush out your system.
What do liver flukes feed on?
Adult liver flukes feed on liver tissue while in the mammal host. The larvae stage known as redia feed on the digestive gland or liver while in the snail host. The free-living miracidium and metacercarium stages are non-feeding.
How do blood flukes affect the human body?
Untreated infections lead to enlarged liver, abdominal pain, anemia, blood in the urine or feces, trouble passing urine and an increased risk of bladder cancer. Schistosomiasis affects about 240 million people worldwide and is estimated to be responsible for over 200,000 deaths each year in sub-Sahara Africa.
What is the life cycle of liver fluke?
Following ingestion, the young flukes migrate to the liver, through which they tunnel, causing considerable tissue damage. The infection is patent about 10-12 weeks after the metacercariae are ingested. The whole cycle takes 18-20 weeks.
What are the characteristics of liver fluke?
The body of liver flukes is leaf-like and flattened. The body is covered with a tegument. They are hermaphrodites having complete sets of both male and female reproductive systems. They have simple digestive systems and primarily feed on blood.