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Chapters
0:00 Introduction
0:42 Causes of Syphilis
1:40 Symptoms of Syphilis
3:21 Diagnosis of Syphilis
3:37 Treatment of Syphilis
Syphilis is a sexually transmitted infection caused by the bacterium Treponema pallidum subspecies pallidum.[3] The signs and symptoms of syphilis vary depending in which of the four stages it presents (primary, secondary, latent, and tertiary).[1] The primary stage classically presents with a single chancre (a firm, painless, non-itchy skin ulceration usually between 1 cm and 2 cm in diameter) though there may be multiple sores.[1] In secondary syphilis, a diffuse rash occurs, which frequently involves the palms of the hands and soles of the feet.[1] There may also be sores in the mouth or vagina.[1] In latent syphilis, which can last for years, there are few or no symptoms.[1] In tertiary syphilis, there are gummas (soft, non-cancerous growths), neurological problems, or heart symptoms.[2] Syphilis has been known as "the great imitator" as it may cause symptoms similar to many other diseases.[1][2]
Syphilis is most commonly spread through sexual activity.[1] It may also be transmitted from mother to baby during pregnancy or at birth, resulting in congenital syphilis.[1][6] Other diseases caused by Treponema bacteria include yaws (T. pallidum subspecies pertenue), pinta (T. carateum), and nonvenereal endemic syphilis (T. pallidum subspecies endemicum).[2] These three diseases are not typically sexually transmitted.[7] Diagnosis is usually made by using blood tests; the bacteria can also be detected using dark field microscopy.[1] The Centers for Disease Control and Prevention (U.S.) recommend all pregnant women be tested.[1]
The risk of sexual transmission of syphilis can be reduced by using a latex or polyurethane condom.[1] Syphilis can be effectively treated with antibiotics.[3] The preferred antibiotic for most cases is benzathine benzylpenicillin injected into a muscle.[3] In those who have a severe penicillin allergy, doxycycline or tetracycline may be used.[3] In those with neurosyphilis, intravenous benzylpenicillin or ceftriaxone is recommended.[3] During treatment people may develop fever, headache, and muscle pains, a reaction known as Jarisch-Herxheimer.[3]