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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.
Man with syphilis in German East Africa, c. early 1900s. Syphilis, a sexually transmitted infection, is a major danger to public health, particularly in developing countries, including those in sub-Saharan Africa. The disease, whose origin is contested amongst researchers, arrived in Africa no later than the 16th century. Since then, it has ...
Bejel, or endemic syphilis, is a chronic skin and tissue disease caused by infection by the endemicum subspecies of the spirochete Treponema pallidum. Bejel is one of the "endemic treponematoses" ( endemic infections caused by spiral-shaped bacteria called treponemes ), a group that also includes yaws and pinta .
By 1956, congenital syphilis had been almost eliminated, and female cases of acquired syphilis had been reduced to a hundredth of their level just 10 years previously. [ 90 ] In 1978 in England and Wales, homosexual men accounted for 58% of syphilis cases in (and 76% of cases in London), but by 1994–1996 this figure was 25%, possibly driven ...
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]
Tabes dorsalis is caused by demyelination by advanced syphilis infection (tertiary syphilis) when the primary infection by the causative spirochete bacterium, Treponema pallidum, is left untreated for an extended period of time (past the point of blood infection by the organism). [3]
Neurosyphilis is the infection of the central nervous system by Treponema pallidum, the bacterium that causes the sexually transmitted infection syphilis.In the era of modern antibiotics, the majority of neurosyphilis cases have been reported in HIV-infected patients.
Meningeal syphilis (as known as syphilitic aseptic meningitis or meningeal neurosyphilis) is a chronic form of syphilis infection that affects the central nervous system. Treponema pallidum , a spirochate bacterium, is the main cause of syphilis, which spreads drastically throughout the body and can infect all its systems if not treated ...