This disease's causative agent is subtyped by determining the number of repeats in the arp gene.
This disease's causative agent is subtyped by determining the number of repeats in the arp gene. One test for it mixes patient blood with cardiolipin. Its later stages are marked by pupils that accommodate but don't react named for Argyll and Robertson. Its causative agent shares morphology with Leptospira and shares a genus with the causative agents of bejel, yaws, and pinta. Its tertiary stage can be marked by aortic dissections and (*) insanity. Paul Erlich developed the "magic bullet" Salvarsan to treat this disease. Painless chancres are hallmarks of its primary stage, which was also studied in an ethically dubious experiment in Tuskeegee, Alabama. For 10 points, name this sexually transmitted disease caused by the spirochete Treponema pallidum.
This disease's causative agent is subtyped by determining the number of repeats in the arp gene.
syphilis [accept neurosyphilis throughout; accept Treponema pallidum until mention; prompt on "Treponema" until mention]