title: Natural resistance to animal parasites.
mesh_terms: D000367:Age Factors; D000818:Animals; D001402:B-Lymphocytes / Q000276:immunology; D007113:Immunity, Innate; D007694:Killer Cells, Natural / Q000276:immunology; D008264:Macrophages / Q000276:immunology; D051379:Mice; D008815:Mice, Inbred Strains; D008819:Mice, Nude; D010271:Parasites / Q000276:immunology*; D010272:Parasitic Diseases / Q000276:immunology*; D012737:Sex Factors