Human African trypanosomiasis, also known as sleeping sickness, is a vector-borne parasitic disease caused by Trypanosoma, which are protozoa transmitted to humans by tsetse flies (Glossina spp.).

Amebiasis is defined as disease caused by amoebas, one-celled parasites. They cause Amebic Dysentery and a variety of other diseases.

Babesiosis is and infection caused by hemoprotozoan parasites of the genus Babesia and transmitted by the bite of Ixodes ticks.

Blastocystosis is a medical condition caused by infection with Blastocystis, a single-celled parasite that infects the gastrointestinal tract of humans and animals.

Disease caused by the protozoan parasite (Trypanosoma cruzi) transmitted by bites of blood-feeding Assassin bugs (Hemiptera: Reduviidae, subfamily Triatominae). Occurs in northern South America, Central America, and Mexico.

Cyclosporiasis is caused by a one-celled parasite in the genus Cyclospora. It is a gastrointestinal disorder caused by contaminated food or water.

Flukes or trematodes are parasites that cause cause a variety of infections in humans. Flukes are classified as blood flukes, liver flukes, lung flukes, and intestinal flukes.

Giardiasis is caused by a one-celled parasite in the genus Giardia. It causes a gastrointestinal illness. Nicknames for the disease include Beaver Fever and the Rocky Mountain Trots.

A disease caused by any of a number of species of protozoa in the genus Leishmania. There are four major clinical types of this infection: cutaneous, diffuse cutaneous, mucocutaneous, and visceral.

Lymphatic filariasis is also known as elephantiasis. It is a disease of the tropics characterized by grotesque swelling of the limbs and male genitalia. The disease is caused by thread-like, parasitic filarial worms, Wuchereria bancrofti, Brugia malayi and B. timori. These worms lodge in the lymphatic system. They live for 4-6 years, producing millions of tiny larvae (microfilariae) that circulate in the blood.

Parasitic nematodes, also know as roundworms, cause diseases in a variety of organs. Their larva can cause disease by migrating through the body.

Onchocerciasis, also known as river blindness, is caused by the nematode Onchocerca volvulus and can result in dermatitis, subcutaneous nodules, lymphadenitis, and visual impairment, including blindness. The disease is transmitted by the bite of female Simulium flies (black flies) that bite by day and are found near rapidly flowing rivers and streams. It affects over 17 million people in 25 nations in Africa.

Pinworms are caused by the nematode parasite Enterobius vermicularis. It is mostly found in infants and young children. The main symptoms are severe itching in the anal area and behavioral changes due to the itching.

Schistosome cercarial dermatitis, caused by skin entry by larval flatworms, experienced after body contact with natural waters.

Tapeworms, also know as cestodes, cause disease when the adult worms inhabit the digestive tract or when their larva cause cysts in body organs.

Toxoplasmosis is caused by Toxoplasma gondii, a protozoan parasite. It can be transmitted to humans in several ways: by eating undercooked, contaminated meat or foods that have been cross-contaminated during storage or preparation; direct or indirect contact with an infected animal, particularly cats; congenital transmission from an infected mother to her unborn child; and, rarely, via contact with infected blood or transplanted organs. Healthy individuals who become infected may not have any symptoms. However, toxoplasmosis can result in serious illness and retinal lesions. Congenital transmission may cause miscarriage, stillbirth, or abnormalities, and later vision loss, mental disability, and seizures.