| Babesia felis | Species found in domestic and wild members of the cat family, chiefly in Africa and India, causing babesiosis less severe than that caused by Babesia canis. (05 Mar 2000) |
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| Babesia gibsoni | Species that infects dogs, wolves, and jackals, chiefly in India, Sri Lanka, and China, and is smaller than Babesia canis; only slightly pathogenic for the natural host, the jackal, but highly pathogenic in the dog. (05 Mar 2000) |
| Babesia microti | A malaria-like protozoan naturally parasitizing certain rodents (Peromyscus and Microtus spp.) in North America; a number of human cases have been reported from Nantucket and Martha's Vineyard islands and nearby coastal New England. The local tick vector is Ixodes dammini, whose numbers and infection levels have greatly increased in recent years with the increase in the deer population, which serves as an abundant blood source for I. Dammini. See: Borrelia burgdorferi. (05 Mar 2000) |
| Babesia motasi | Species that causes acute or chronic disease of sheep and goats in southern Europe, Africa, the Middle East, the area formerly known as the U.S.S.R., and other areas; transmitted by ticks of the genera Rhipicephalus, Haemaphysalis, and Dermacentor. (05 Mar 2000) |
| Babesia trautmanni | Species that causes mild or fatal babesiosis in pigs in southern Europe, the area formerly known as the U.S.S.R., and Africa; the vector is Rhipicephalus sanguineus. (05 Mar 2000) |