title: Comparative response to premunization using attenuated Anaplasma marginale virulent A. marginale and A. centrale in different age groups.
mesh_terms: D000367:Age Factors; D000709:Anaplasma / Q000276:immunology* / Q000302:isolation & purification; D000712:Anaplasmosis / Q000276:immunology* / Q000382:microbiology; D000818:Animals; D001428:Bacterial Vaccines / Q000008:administration & dosage; D001769:Blood / Q000382:microbiology; D002417:Cattle; D002418:Cattle Diseases / Q000276:immunology* / Q000382:microbiology; D003168:Complement Fixation Tests; D006400:Hematocrit; D007279:Injections, Subcutaneous; D013156:Splenectomy; D014613:Vaccines, Attenuated / Q000008:administration & dosage; D014774:Virulence
chemical_list: D001428:Bacterial Vaccines; D014613:Vaccines, Attenuated