A stage of venereal syphilis characterized by the appearance of a chancre is known as

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Treponema pallidum causes venereal (transmitted through sexual contact) syphilis. The clinical presentation of venereal syphilis is varied and complex, often mimicking many other diseases. This disease is divided into stages: incubating, primary, secondary, early latent, latent, and tertiary. Primary syphilis is characterized by the appearance of a chancre (a painless ulcer) usually at the site of inoculation, most commonly the genitalia. Within 3 to 6 weeks, the chancre heals. Dissemination of the organism occurs during this primary stage.

A Stage of Venereal Syphilis Characterized by the Appearance of a Chancre