Syphilis is a sexually transmitted infection caused by the bacterium Treponema pallidum subspecies pallidum. The signs and symptoms of syphilis vary depending in which of the four stages it presents . The primary stage classically presents with a single chancre , but there may be multiple sores. In secondary syphilis a diffuse rash occurs, which frequently involves the palms of the hands and soles of the feet. There may also be sores in the mouth or vagina. In latent syphilis, which can last for years, there are few or no symptoms. In tertiary syphilis there are gummas , neurological, or heart symptoms. Syphilis has been known as "the great imitator" as it may cause symptoms similar to many other diseases. Syphilis is most commonly spread through sexual activity. It may also be transmitted from mother to baby during pregnancy or at birth, resulting in congenital syphilis. Other human diseases caused by related Treponema pallidum subspecies include yaws , pinta , and bejel . Diagnosis...
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Shortcuts to chapters:
00:02:48 Signs and symptoms
00:03:06 Primary
00:04:16 Secondary
00:05:30 Latent
00:05:57 Tertiary
00:07:40 Congenital
00:08:17 Bacteriology
00:08:59 Transmission
00:10:09 Diagnosis
00:10:32 Blood tests
00:11:34 Direct testing
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