[Origin of Nichols Treponema strain; preservation of its virulence for man after 40 years].
D006801:Humans; D008297:Male; D011309:Preservation, Biological; D013587:Syphilis; D014208:Treponema; D014210:Treponema pallidum; D014774:Virulence
SYPHILIS; TREPONEMA PALLIDUM
Rappel de l'origine de la souche tréponémique Nichols; conservation de sa virulence pour l'homme après 40 ans.