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Trypanosomiasis or trypanosomosis is the name of several diseases in vertebrates caused by parasitic protozoan trypanosomes of the genus Trypanosoma. In humans this includes African trypanosomiasis and Chagas disease. A number of other diseases occur in other animals.
T. brucei, which causes sleeping sickness in humans and nagana in cattle; T. cruzi, which causes Chagas disease in humans; Trypanosoma culicavium, which infects birds and mosquitoes; T. congolense, which causes nagana in ruminant livestock, horses and a wide range of wildlife; T. equinum, in South American horses, transmitted via Tabanidae,
Chagas disease, also known as American trypanosomiasis, is a tropical parasitic disease caused by Trypanosoma cruzi. It is spread mostly by insects in the subfamily Triatominae, known as "kissing bugs". The symptoms change throughout the infection.
The three major human diseases caused by trypanosomatids are; African trypanosomiasis (sleeping sickness, caused by Trypanosoma brucei and transmitted by tsetse flies [3]), South American trypanosomiasis (Chagas disease, caused by T. cruzi and transmitted by triatomine bugs), and leishmaniasis (a set of trypanosomal diseases caused by various species of Leishmania transmitted by sandflies [4]).
The first is a parasite of non-human mammals and causes nagana, while the latter two are zoonotic infecting both humans and animals and cause African trypanosomiasis. T. brucei is transmitted between mammal hosts by an insect vector belonging to different species of tsetse fly (Glossina). Transmission occurs by biting during the insect's blood ...
African trypanosomiasis is an insect-borne parasitic infection of humans and other animals. [ 3 ] Human African trypanosomiasis (HAT), also known as African sleeping sickness or simply sleeping sickness , is caused by the species Trypanosoma brucei . [ 3 ]
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Trypanosomiasis in humans progresses with the development of the trypanosome into a trypomastigote in the blood and into an amastigote in tissues. As the infection progresses, the number of infected cells increases, as well as the number of amastigotes per infected cell (APC). If the average of APC is one or close to one, the infection has just ...