Bacterial DNA â a circular chromosome plus plasmids. The DNA of most bacteria is contained in a single circular molecule, called the bacterial chromosome. The chromosome, along with several proteins and RNA molecules, forms an irregularly shaped structure called the nucleoid.
What are the effects? If left untreated, syphilis can eventually cause damage to the brain, nerves, eyes, heart, blood vessels, liver, bones, and joints. In extreme cases it can cause difficulty coordinating muscle movements, paralysis, numbness, gradual blindness, mental illness, and even death. If you have syphilis and are pregnant, it can cause serious birth defects and stillbirth.
1 The pain and rash occur near an eye. If left untreated, this infection can lead to permanent eye damage. 2  You're 70 or older, because age significantly increases your risk of complications.  You or someone in your family has a weakened immune system (due to cancer, medications or chronic illness).