trypanosome
noun
try·pano·some tri-ˈpa-nə-ˌsōm 
: any of a genus (Trypanosoma) of parasitic flagellate protozoans that infest the blood of various vertebrates including humans, are usually transmitted by the bite of an insect, and include some that cause serious diseases (such as sleeping sickness and Chagas disease)
Example Sentences
Recent Examples on the Web Animals that might harbor trypanosomes were hunted down. 
Carey Baraka, Quartz Africa, 26 Apr. 2020 The cause of the headaches, weakness and pain were trypanosomes, tiny parasites spread by the bite of the tsetste fly — a companion of the elephants. SFChronicle.com, 30 Oct. 2019 The cause of the headaches, weakness and pain were trypanosomes, tiny parasites spread by the bite of the tsetste fly — a companion of the elephants. Washington Post, 30 Oct. 2019
Carey Baraka, Quartz Africa, 26 Apr. 2020 The cause of the headaches, weakness and pain were trypanosomes, tiny parasites spread by the bite of the tsetste fly — a companion of the elephants. SFChronicle.com, 30 Oct. 2019 The cause of the headaches, weakness and pain were trypanosomes, tiny parasites spread by the bite of the tsetste fly — a companion of the elephants. Washington Post, 30 Oct. 2019 Word History
Etymology
New Latin Trypanosoma, from Greek trypanon auger + New Latin -soma -some — more at trepan
First Known Use
1903, in the meaning defined above
Medical Definition
trypanosome
noun
try·pano·some tri-ˈpan-ə-ˌsōm
: any flagellate of the genus Trypanosoma