TABLE 02: Infectious Causes of Anemia

	Infectious Agent   Species Affected   Hemolytic   Marrow Affected Bacteria             Clostridium perfringens A   Cattle, sheep   Yes   No Clostridium haemolyticum   Cattle, sheep   Yes   No Leptospira interrogans   Cattle, pigs, sheep   Yes   No Haemobartonella spp   Cattle, cats   ±   No Viruses             Equine infectious anemia virus   Horses   ±   Rarely Feline leukemia virus   Cats   ±   Yes Feline immunodeficiency virus   Cats   No   Yes Rickettsia             Mycoplasma spp   Cattle, goats, llamas, pigs, sheep*   Yes (piglets only)   No Anaplasma spp   Cattle, goats, sheep   Yes   No Ehrlichia spp   Dogs   Yes   Yes Protozoa             Babesia spp   Cattle, cats, dogs, horses, sheep   Yes   No Theileria spp †   Cattle, goats, sheep   ±   No Cytauxzoon spp   Cats   No   Yes Trypanosoma spp   Cattle, horses, pigs   Yes   No Sarcocystis cruzi   Cattle   Yes   No
	*In adults, only clinically relevant in splenectomized or critically ill patients
	†Pathogenic species of Theileria occur in Africa, the Mediterranean, the Middle East, Asia, and Europe. Species found in North America are nonpathogenic.

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