title: Variation of type antigens of group-B streptococci. I. Variation of the X-antigen and of other type antigens in herds where the X-antigen occurs.
mesh_terms: D000818:Animals; D000942:Antigens, Bacterial / Q000235:genetics*; D002417:Cattle / Q000382:microbiology*; D000939:Epitopes / Q000276:immunology; D005260:Female; D014644:Genetic Variation; D008414:Mastitis, Bovine / Q000382:microbiology; D013292:Streptococcus agalactiae / Q000276:immunology*
chemical_list: D000942:Antigens, Bacterial; D000939:Epitopes