How infectious is syphilis?

PC Schober, G Gabriel, P White, WF Felton… - Sexually Transmitted …, 1983 - sti.bmj.com
PC Schober, G Gabriel, P White, WF Felton, RN Thin
Sexually Transmitted Infections, 1983sti.bmj.com
In a study of the sexual contacts of patients with primary and secondary syphilis, 65 of 127
(51%) contacts at risk developed syphilis. There was no significant difference between
figures for homosexuals (48/98, 49%) and for heterosexuals (17/29, 58%). Our findings are
similar to those of the prepenicillin era, but the question, Why are so few contacts infected?
remains unanswered.
In a study of the sexual contacts of patients with primary and secondary syphilis, 65 of 127 (51%) contacts at risk developed syphilis. There was no significant difference between figures for homosexuals (48/98, 49%) and for heterosexuals (17/29, 58%). Our findings are similar to those of the prepenicillin era, but the question, Why are so few contacts infected? remains unanswered.
sti.bmj.com