title: Immunologic evidence for horizontal transmission of MTV.
mesh_terms: D000818:Animals; D003601:Cytotoxicity Tests, Immunologic; D004912:Erythrocytes / Q000276:immunology; D005260:Female; D008214:Lymphocytes / Q000276:immunology; D008325:Mammary Neoplasms, Experimental / Q000276:immunology / Q000635:transmission*; D008324:Mammary Tumor Virus, Mouse / Q000276:immunology*; D051379:Mice; D008807:Mice, Inbred BALB C; D011247:Pregnancy; D013154:Spleen / Q000166:cytology