Spirochete bacteria {syphilis}| can cause nerve-cell damage after entering blood from genitals. Bacteria make chancres 9 to 90 days after contact, cause rashes several weeks to six months later, and then can be latent for 10 to 20 years followed by blindness, heart trouble, and brain damage. Congenital syphilis can cause brain damage. People cannot become immune to syphilis. Syphilis reached Europe in 1495. Wassermann test detects syphilis. Penicillin kills syphilis bacteria.
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Date Modified: 2022.0224