title: Difficulty in protecting lambs against Pasteurella haemolytica biotype A with antiserum.
mesh_terms: D000818:Animals; D000831:Animals, Newborn / Q000276:immunology; D001428:Bacterial Vaccines; D007106:Immune Sera / Q000494:pharmacology*; D051379:Mice; D010325:Pasteurella / Q000276:immunology*; D010326:Pasteurella Infections / Q000517:prevention & control / Q000662:veterinary*; D010538:Peritonitis / Q000517:prevention & control / Q000662:veterinary; D011014:Pneumonia / Q000517:prevention & control / Q000662:veterinary; D018805:Sepsis / Q000517:prevention & control / Q000662:veterinary; D012756:Sheep / Q000276:immunology; D012757:Sheep Diseases / Q000517:prevention & control*; D014611:Vaccination / Q000662:veterinary*
chemical_list: D001428:Bacterial Vaccines; D007106:Immune Sera