title: Herd types of group-B streptococci. Their prevalence among herds in four Danish mastitis control areas and the relation of type to the spread within herds.
mesh_terms: D000818:Animals; D002417:Cattle; D003718:Denmark; D005260:Female; D008414:Mastitis, Bovine / Q000453:epidemiology* / Q000382:microbiology / Q000635:transmission; D013045:Species Specificity; D013292:Streptococcus agalactiae / Q000302:isolation & purification