Crithidia fasciculata

Crithidia fasciculata are a species of parasitic protists, often found in insects, and are often used as a model organism is research that may then be applied to Trypanosoma brucei.

Unlike many other protists, C. fasciculata contain just one large mitochondria, and require a very high quality nutrient broth (containing added heme and follic acid) to grow.