Paper 32. David Stiller, Wayne M. Frerichs. 1979. Experimental transmission of Babesia caballi to equids by different stages of the tropical horse tick, Anocentor nitens. Pages 263-268. In: J. G. Rodriguez (editor). Recent Advances in Acarology Volume II. Proceedings of the V International Congress of

Acarology, August 6-12 at Michigan State University, East Lansing, Michigan, New York: Academic Press, 569 pages.

Keywords: medical acarology, tick colony maintenance, tick feeding, disease vector, experimental tick groups, equine hosts, the horse tick transmits viruses transovarially, ground tick eggs harbored the virus. The tropical horse tick Anocentor nitens is the only known New World vector of the hemoprotozoan parasite Babesia caballi which causes equine piroplasmosis throughout most of the world.