Syphilis Transmission and Contagiousness

Introduction to Contagiousness

• The Centers for Disease Control and Prevention (CDC) recommends that the rash of secondary syphilis is contagious through direct contact with mucocutaneous lesions, but not through casual ordinary contact 1, 2

Transmission and Contagiousness

• The transmission of Treponema pallidum occurs only when syphilitic mucocutaneous lesions are present, according to the CDC 1, 2
• The CDC states that these contagious manifestations are rare after the first year of infection 1, 2

Context and Recommendations

• The CDC recommends that only contact with mucocutaneous lesions is infectious, meaning casual contact (handshakes, sharing utensils, ordinary social contact) is not a mode of transmission 1, 2
• The CDC advises that individuals sexually exposed to a patient with primary, secondary, or early latent syphilis within the previous 90 days should be treated presumptively, even if seronegative 1, 2

Precautions and Implications

• The CDC recommends that standard precautions are sufficient during clinical examination, and the risk of transmission through casual contact (without direct contact with lesions) is negligible 1, 2
• The CDC suggests that sexual partners require evaluation and presumptive treatment, not ordinary social contacts 1, 2