Abstract: | After a comprehensive rernew of the literature on syphiliticaortitis, Longcope, (1) stated in 1913; ": . . . the presence of spiro:chetes in these lesions, as might be expected, cannot by any means beconstantly demonstrated with Levaaiti stain. . . . . . . That theseorganisms are ''Treponema pallidum seems almost certain thouS:h actual proof of such by culture from the arterial lesions, a most difficult task, or direct inoculation into animals, has not as yet been accomplished." |