babesia caballi babesia caballi babesia caballi is a species belonging to alveolata and the family babesiidae. in horses, it causes the babesiosis disease, called "equine babesiosis". its length is 2.5-5 µm, while its width is 2 µm. it is usually oval-shaped. its vector and second feeders are ticks. in north america b. caballi is being spread by dermacentor nitens. babesia caballi babesia caballi in vitro culture scientific classification domain: eukaryota clade: diaphoretickes clade: tsar clade: sar clade: alveolata phylum: apicomplexa class: aconoidasida order: piroplasmida family: babesiidae genus: babesia species: b. caballi binomial name babesia caballi(nuttall & strickland, 1910) bibliography furmaga, stanisław (1983). choroby pasożytnicze zwierząt domowych. warsaw: państwowe wydawnictwo rolnicze i leśne. isbn 978-83-09-00671-8. griffiths, henry joseph (1978). a handbook of veterinary parasitology : domestic animals of north america. minneapolis: university of minnesota press. isbn 978-0-8166-0828-7.