title: Preparation of T. pallidum extracts from infected rabbit testes.
mesh_terms: D000818:Animals; D002498:Centrifugation; D005374:Filtration; D008297:Male; D011817:Rabbits; D013737:Testis / Q000382:microbiology*; D014210:Treponema pallidum / Q000302:isolation & purification*; D014774:Virulence