Eurytrema pancreaticum, a parasite of the pancreatic ducts of pigs, cattle, camels, and monkeys (and once reported in humans) is primarily found in the Orient and less frequently in South America.
This parasite has two intermediate hosts during its life cycle. The first intermediate host is a terrestrial snail and the second host is a grasshopper.
Fasciolopsis buski is a parasite that lives in the small intestines of humans and pigs with pigs serving as its reservoir host. It is one of the largest trematodes found in humans, measuring up to 80 mm in length. Fasciolopsis buski is commonly found in many countries of the Orient. Pigs serve as the reservoir host for most of the parasites that infect humans and domestic animals.
The life cycle of this parasite is similar to Fasciola hepatica (sheep liver fluke shown below). Worms of this organism produce up to 25,000 eggs per worm per day. These are passed in the host’s feces. The first intermediate host is a snail, and the emerging cercariae encyst on vegetation that is consumed by humans or pets.
Chronic infections with this parasite produces serious symptoms that can ultimately result in death. These symptoms include inflammation, ulceration, hemorrhage and abscesses of the small intestine. The disease is diagnosed from eggs recovered in the stool of the host.