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Similarly, nearly 20,000 primary and secondary syphilis cases were reported in 2014, a hike of 15.1 percent since 2013, while 458 cases of congenital syphilis were discovered and reported – a 27.5 percent increase over the prior year.
According to the CDC, most reported chlamydia and gonorrhea infections occur in people between the ages of 15 and 24 years old.
Charlotte Roberts, archaeologist at the University of Durham and author of the book "The Archaeology of Disease." DNA testing of samples from mummies and skeletons can conclusively identify disease.
And even without the evidence of a body, genes in existing samples of TB and leprosy bacteria suggest prehistoric origin.
Signs and symptoms that might indicate an STI include: Sexual activity plays a role in spreading many other infectious agents, although it's possible to be infected without sexual contact.
Examples include the hepatitis A, B and C viruses, shigella, and Giardia intestinalis.
It's possible to contract sexually transmitted diseases from people who seem perfectly healthy, and who may not even be aware of the infection.
Syphilis infection can also place a person at increased risk for acquiring or transmitting HIV infection.
Available surveillance data indicate that an average of half of MSM who have syphilis are also infected with HIV.
Anyone who is sexually active risks exposure to a sexually transmitted infection to some degree.
Factors that may increase that risk include: Certain STIs — such as gonorrhea, chlamydia, HIV and syphilis — can be passed from an infected mother to her child during pregnancy or delivery.