title: Protection of sheep by vaccination against artificial challenge with Leptospira interrogans serovar hardjo.
mesh_terms: D000818:Animals; D001428:Bacterial Vaccines; D005260:Female; D007921:Leptospira interrogans / Q000276:immunology; D012756:Sheep; D012757:Sheep Diseases / Q000517:prevention & control*; D014611:Vaccination; D014895:Weil Disease / Q000517:prevention & control / Q000662:veterinary*
chemical_list: D001428:Bacterial Vaccines