TIM VERNON / SCIENCE PHOTO LIBRARY TIM VERNON / SCIENCE PHOTO LIBRARY
Syphilis infection. Computer illustration of Treponema pallidum bacteria in the human body. T. pallidum is the pathogen responsible for the dangerous sexually transmitted infection syphilis. The last of three stages of syphilis is the most severe and can cause damage to the heart, blood vessels, brain and spinal cord. Treatment with penicillin antibiotics is effective if administered during the early stages.
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