- Molecular subtyping of Treponema pallidum in an Arizona County with increasing syphilis morbidity: use of specimens from ulcers and blood. Sutton, M.Y., Liu, H., Steiner, B., Pillay, A., Mickey, T., Finelli, L., Morse, S., Markowitz, L.E., St Louis, M.E. J. Infect. Dis. (2001)