Babesiidae

noun plural

Ba·​be·​si·​i·​dae ˌbab-ə-ˈzī-ə-ˌdē  -ˈzē- 

: a family of the order Haemosporidia comprising minute protozoan parasites of mammalian red blood cells that are transmitted from host to host by the bite of a tick intermediate host and cause some destructive diseases of domestic animals see babesia