Canadian Medical Guide > Organisms > Bacteria > Gram-Negative Bacteria > Anaplasmataceae Terms and Definitions

Anaplasmataceae

	Anaplasma - A genus of gram-negative bacteria whose organisms are obligate parasites of vertebrates. Species are transmitted by arthropod vectors with the host range limited to ruminants. Anaplasma marginale is the most pathogenic species and is the causative agent of severe bovine anaplasmosis.
	Ehrlichia - Small, often pleomorphic, coccoid to ellipsoidal organisms occurring intracytoplasmically in circulating LYMPHOCYTES. They are the etiologic agents of tick-borne diseases of humans, DOGS, CATTLE, SHEEP, GOATS, and HORSES.
	Neorickettsia - Genus of gram-negative, intracytoplasmic bacteria that are found primarily in VACUOLES of MONOCYTES in the BLOOD and MACROPHAGES of lymphoid or other tissues of DOGS; HORSES, and humans. (From Int. J. Syst. Evol. Microbiol. (2001) 51:2145-2165)

Anaplasmataceae Medical Definitions and Terms