noun phaseÂ·out \ËfÄz-ËauÌt\. : the act of stopping something gradually over a period of time in a planned series of steps or phases.
C. Incubation period: Usually 3 weeks, ranges from 10 days to 3 months for primary symptoms. D. Period of communicability: Moist mucocutaneous lesions of primary and secondary syphilis are infectious. However, it is difficult to differentiate between the infectious stage and the noninfectious early latent stage.
Primary syphilis is the stage of infection which occurs 3 to 90 days (a median of 3 weeks) after infection. It is most commonly characterized by a single, painless chancre or ulcer that develops at the site of inoculation ( Figure 1) (119). The chancre typically has a smooth base with raised and firm borders.