Premunization with an attenuated Anaplasma marginale.
D000367:Age Factors; D000709:Anaplasma / Q000276:immunology*; D000712:Anaplasmosis / Q000276:immunology*; D000818:Animals; D001428:Bacterial Vaccines / Q000008:administration & dosage*; D002417:Cattle; D002418:Cattle Diseases / Q000276:immunology*; D014774:Virulence
D001428:Bacterial Vaccines