Insects and arachnids of medical importance for being hematophagous, at least in some species, include the sandfly, blackfly, tsetse fly, bedbug, assassin bug, mosquito, tick, louse, mite, midge, and flea.
Babesiosis, sometimes referred to as piroplasmosis, is a protozoan, tick-transmitted disease found worldwide in humans, wildlife and domesticated animals, including horses.