Tropical-cluster diseases are six conditions that are largely limited to territories in Africa and the tropical parts of South America. They are all caused by parasites that have complex life cycles, a period inside humans and a period inside insects; except Schistosomiasis which does not have a period in insects but in snails. The six conditions are (with their contribution to the total deaths within tropical-cluster diseases A in 2002):
Sleeping sickness [Trypanosomiasis] U022 Map 391, (30% of deaths).
American trypanosomiasis [Chagas' disease] U023 Map 392, (9% of deaths).
Bilharzia [Schistosomiasis] U024 Map 393, (28% of deaths).
Espundia and kalar-azar [Leishmaniasis] U025 Map 394, (32% of deaths).
Elephantiasis [Lymphatic filariasis] U026 Map 395, (0.3% of deaths).
River blindness [Onchocerciasis] U027 no map, (0.001% of deaths).
Tropical-cluster diseases caused 0.3% of all deaths worldwide in 2002, with an average of 25 deaths per million people.