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Syphilis (/ ˈ s ɪ f ə l ɪ s /) is a sexually transmitted infection caused by the bacterium Treponema pallidum subspecies pallidum. [1] The signs and symptoms depend on the stage it presents: primary, secondary, latent or tertiary.
A chancre (/ ˈ ʃ æ ŋ k ər / SHANG-kər) [1] is a painless genital ulcer most commonly formed during the primary stage of syphilis. [2] This infectious lesion forms around 21 days after the initial exposure to Treponema pallidum, the gram-negative spirochaete bacterium causing syphilis, but can range from 10 to 90 days. [2]
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Secondary syphilis. Syphilis is an STI caused by a bacterium. Untreated, it can lead to complications and death. [67] Clinical manifestations of syphilis include the ulceration of the uro-genital tract, mouth or rectum; if left untreated the symptoms worsen.
Syphilis prevalence dropped to an all-time low by 1955. A total of 6993 cases of primary and secondary syphilis were recorded in 1998, the lowest number since 1941. [86] In 2000 and 2001 in the United States, the national rate of reported primary and secondary syphilis cases was 2.1 cases per 100,000 population (6103 cases reported).
English: This graph entitled, Congenital Syphilis, Primary and Secondary Rates, by Year – United States, 1992-1998, revealed the parallel relationship in the rates of these illnesses over this six year period. The number of congenital syphilis case were measured as per every 100,000 live births, while the primary and secondary syphilis cases ...
The initial ulcer may be mistaken as a "hard" chancre, the typical sore of primary syphilis, as opposed to the "soft chancre" of chancroid. [citation needed] Approximately one-third of the infected individuals will develop enlargements of the inguinal lymph nodes, the nodes located in the fold between the leg and the lower abdomen. [citation ...
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