There are several different types of flukes. Each reside in a different part of the human host and affects the human body differently
flukes would be found in the intestinal tract or lungs
Flukes are contracted by ingestion of eggs or encysted (encased) larva from contaminated water, raw water plants (water chestnuts, water bamboo shoots, etc.), or raw or inadequately cooked fish or snails.
There are many types of flukes for different animals. In humans, we can be infected with a couple of types of liver flukes, a lung fluke, and blood flukes.
Aquatic snails and Flukes live in the water. Generally warm, shallow water that gets a lot of sun, but has shade as well.
Since you did not specify the species I'm going to guess you mean Cestodes (tapeworms) and digeneans (flukes). They can be found in rivers which have been polluted with feces or sewer sludge. Often found in farm land which was treated with raw sewage. They can be transferred from animal to humans when the human eats uncooked infected meat. They can also infect humans who wash or bath in infected waters.
Humans
The liver fluke's phylum is the Platyhelminthes. The liver fluke is a parasitic flatworm that can live in the liver of animals and humans. The Chinese liver fluke can infect a human's liver and can cause symptoms like weight loss and diarrhea.
Liver flukes can be caused by eating undercooked pork products. Undercooked pork contains a bacteria that can cause liver flukes.
nounPathology.an infection caused by parasitic flukes of the genus Schistosoma, occurring commonly in eastern Asia and in tropical regions and transmitted to humans through feces-contaminated fresh water or snails: symptoms commonly include pain, anemia, and malfunction of the infected organ.
Humans got infected by fleas(who carried the virus) who traveled on rats. Because of poor health conditions the fleas contacted humans and when they bit the humans their infected blood infected the human host.
Ticks are infected when their host is infected. The infected ticks then spread the disease to humans.
Humans are considered accidental hosts and become infected with Leptospira interrogans by contact with urine from infected animals.
What are blood flukes?
the liver fluke worm lives in the liver and the bile ducts of domestic animals and humans