Other Free Encyclopedias » Animal Life Resource » Jellyfish, Sponges, and Other Simple Animals » Flukes: Trematoda - Physical Characteristics, Behavior And Reproduction, Lancet Fluke (dicrocoelium Dendriticum): Species Accounts, Human Blood Fluke (schistosoma Mansoni): Species Accounts - GEOGRAPHIC RANGE, HABITAT, DIET, FLUKES AND PEOPLE, CONSERVATIO

Flukes: Trematoda - Human Blood Fluke (schistosoma Mansoni): Species Accounts

larvae live males veins

Physical characteristics: Female human blood flukes are thin, cylindrical, and one-half to 1 inch (1.3 to 2.5 centimeters) long. Males are a little bit shorter and thicker. Males have small spiny suckers on the mouth and belly and a wrinkled back dotted with small bumps. Females usually spend their lives attached to males. Both males and females are white.


Geographic range: Human blood flukes live in the warm regions of the world, especially South America, Africa, the Caribbean, and the Middle East.


Habitat: The larvae of human blood flukes live in freshwater snails. The adults live in veins in the abdomens of mammals such as rodents, dogs, cattle, baboons, and humans.


Diet: Human blood flukes feed on blood in the abdominal veins of their hosts.

Human blood flukes live in the warm regions of the world, especially South America, Africa, the Caribbean, and the Middle East. (© E. R. Degginger/Photo Researchers, Inc.)

Behavior and reproduction: The eggs of human blood flukes hatch in freshwater areas and develop into larvae, which follow chemical, light, and gravitational cues to find and then penetrate the soft tissues of snails. The larvae transform into another type of larvae and swim out of the snails. The larvae actively seek out the next host by targeting fatty acids in the skin. They then penetrate the skin of a secondary host, which may be a person or other mammal. Once in the host, the larvae become immature flukes, travel to the circulatory system, and travel to veins near the large intestine. Once in the veins, the flukes mature, mate, and lay eggs, many of which leave the host's body with feces. The cycle begins again when the eggs make their way into the freshwater habitat of the snail. Adult male human blood flukes usually live joined with the females, the female remaining in the male's spine-covered reproductive canal, a groove that runs along the lower surface of the body.


Human blood flukes and people: Infection with human blood flukes causes disease in humans. The condition causes abdominal pain, diarrhea, intestinal bleeding, tiredness, and a decrease in red blood cells, leaving the victim weak and vulnerable to other diseases.


Conservation status: Human blood flukes are not threatened or endangered. ∎

Flukes: Trematoda - No Common Name (fasciola Hepatica): Species Accounts [next] [back] Flukes: Trematoda - Lancet Fluke (dicrocoelium Dendriticum): Species Accounts

User Comments

Your email address will be altered so spam harvesting bots can't read it easily.
Hide my email completely instead?

Cancel or

Vote down Vote up

over 6 years ago

I'm also doing a report about these worms they sound unpleasent!

Vote down Vote up

over 6 years ago

i dont want blood flukes......

they sound nasty......

Im doing a report on them, they are bad

Vote down Vote up

almost 5 years ago

But do blood flukes cause Schistosomiasis exclusively? And what's the difference between blood flukes and trematode flatworms?

Vote down Vote up

over 3 years ago

I am an inventor and scientist in Tampa, Fl.See Luken. Got an idea: why not train blood flukes to attack and eat plack in the blood vessels. Could reduce or eliminate advanced plack in the arteries. Once the plack is gone than a course of say tetracycline to eliminate any infections from the exposed plack spots that were on the arturial walls for a month to allow healing. Ron Martino

Vote down Vote up

over 2 years ago

this is fuckingawesome man

Vote down Vote up

over 2 years ago

this is fuckingawesome man

Vote down Vote up

over 2 years ago

I have been researvhing and studying the effects of these foreign invaders for years, since 1993. I am an aspiring writer, digital and citizen journalist who is one of many featured in a movie that is in the making. I have reason to believe and do believe the purposeful injecting of these and other parasites into unsuspecting victims is being carried out in our U. S. mental and prison systems. Unjustified and intentional, such unconscionable acts as this,false arrests and false allegations that wreak havoc on the lives of the innocent and the defenseless are being exposed in Whistle-blower Production's "Lawless America." The injustices i.e. intention pain and suffering; caused by our alleged system of justice are now being exposed by the victims themselves www.lawlessAmerica.com for details on how you can participate in this unprecedented documentary. Who do you know that suffers from such abuse of the system in family court, divorce court and the wrongful foreclosures that have rocked the world. The use of such parasites on a parasite elected that perjures their oath of office each and every day would be most fitting. Victims speak from firsthand knowledge. We shall overcome... this too shall pass. If you have a story, we want it. www.lawlessAmerica.com

Vote down Vote up

about 1 year ago

I'm 13 and I'm trying to find out whats wrong with my mom cause she is really sick an has some sort of parasite that the doctor won't bother to look at, much less do anything about it and this and other sites about this have given hope and helped shed new light in our struggle to find whats wrong so thank u for writing about this. I CANT TELL U HOW HAPPY I AM!