title: Persistence of Brucella abortus infection in six herds of cattle under brucellosis eradication.
mesh_terms: D000034:Abortion, Veterinary / Q000382:microbiology / Q000517:prevention & control; D000818:Animals; D000907:Antibodies, Bacterial / Q000032:analysis; D002003:Brucella abortus / Q000302:isolation & purification; D002007:Brucellosis, Bovine / Q000276:immunology / Q000382:microbiology / Q000517:prevention & control*; D002417:Cattle; D003168:Complement Fixation Tests; D003612:Dairying; D005260:Female; D007074:Immunoglobulin G / Q000276:immunology; D007075:Immunoglobulin M / Q000276:immunology; D007743:Labor, Obstetric; D008892:Milk / Q000382:microbiology; D011247:Pregnancy
chemical_list: D000907:Antibodies, Bacterial; D007074:Immunoglobulin G; D007075:Immunoglobulin M