Any of various parasitic flagellate protozoans of the genus Trypanosoma,transmitted to the vertebrate bloodstream,lymph,and spinal fluid by certain insects and often causing diseases such as sleeping sickness and nagana.

• 锥体虫锥体虫属中的一种寄生性带鞭毛原生动物；被某些昆虫带入脊椎动物的血液淋巴液和脊髓，可导致嗜眠性脑炎及非洲锥虫病等疾病