title: Response of gnotobiotic pigs to immunization and challenge with Hemophilus pleuropneumoniae.
mesh_terms: D000818:Animals; D005856:Germ-Free Life; D006190:Haemophilus / Q000276:immunology; D006192:Haemophilus Infections / Q000276:immunology*; D007114:Immunization; D013552:Swine