Medicine Reference Libraries

The Chinese liver fluke (Clonorchis sinensis) is a species of parasitic worm that is classified within the Platyhelminthes phylum. It can be found in Southeast Asia, Taiwan, Japan, and China and is present in nearly 30,000,000 humans today. It is thought to be one of the world’s most pervading parasites. The Chinese liver fluke requires two intermediate, or secondary, hosts and one...

The Southeast Asian liver fluke (Opisthorchis viverrini) is a parasite that is classified within the Platyhelminthes phylum. It is native to Vietnam, Cambodia, Thailand, and the Lao People's Democratic Republic. It occurs in higher numbers in northern areas of Thailand when compared to central areas of Thailand, and the disease the worm causes, known as opisthorchiasis, does not occur in...

Echinococcus multilocularis is a species of tapeworm that is classified within the Platyhelminthes phylum. It is one of a few worms that cause echinococcosis, a disease that affects many canid species including wolves, coyotes, foxes, jackals, domesticated dogs. Humans can also contract this disease. Adult members of this species can reach an average length of .2 inches, and like other species...

Trichinella spiralis, sometimes known as the pork worm, is a parasite within the Nematoda class. It can be found in pigs, rats, humans, and bears. This worm causes trichinosis in humans, most often from consuming undercooked pork. This species is the smallest within its class, reaching an average body length of .16 centimeters. Females are twice as large as males, displaying a sexual...

The giant roundworm (Ascaris lumbricoides) is a parasitic worm within the Nematoda phylum. This species can be found throughout the world, but occurs in higher numbers in tropical and subtropical areas. It causes the disease known as ascariasis in its human hosts and infects about one quarter of the entire world’s human population. It displays a sexual dimorphism, with females growing larger...

The eye-worm (Loa loa) is a species of roundworm within the Nematoda phylum. It can be found in India and Africa, among other areas. This species causes a disease known as Loa loa filariasis and is one of three species that can cause subcutaneous filariasis in humans. Females are larger than males, reaching an average body length of up to 2.7 inches, with males reaching an average body length...

The common liver fluke (Fasciola hepatica), also known as the sheep liver fluke, is a parasitic flatworm in the Trematoda class. This species can infect sheep, cattle, humans, and other animals across the world. This species is one of the largest of its kind, reaching an average body length of 1.1 inches, with a width of up to .5 inches. This species is shaped like a worm and is typically wider...

Schistosoma haematobium is a species of trematode flatworm, more commonly known as a fluke that can be found in Portugal, the Middle East, Africa, and India. This species is one a few fluke species that can give humans schistosomiasis, most commonly the kind known as urinary schistosomiasis. This species will swim around in water in its larval form known as cercariae. In this stage of life, it...

Thelazia callipaeda is a species of parasitic worm in the Nematoda phylum. It is one of the most common types of worm to infect the eyes of cats, dogs, and humans. This infection is known as thelaziasis or “eye worm” infestation. This species was discovered in 1910, in the eyes of a dog in China. In 2000, it was reported that 250 cases of eye worm infection had been documented in humans....

Wuchereria bancrofti is a species of roundworm in the Nematoda phylum. This species is spread through a mosquito vector, which means that it is transferred through mosquitos. This species infects over 120 million people in South America, Africa, and other tropical and subtropical areas. It is one of three species of parasitic worm that can cause lymphatic filariasis, which can lead to...