infection of the heart and related blood vessels by the syphilis bacteria

anatomy artery biology epidemic health helix illness inside microbiology microscope pathogen red research science treponema pallidum vein three dimensional cardiovascular system blood cell biological micro organism flagellum internal organ heart shape transmission sexually transmitted disease magnification scientific experiment vessel scattered healthcare medicine infectious spiral bacterium sex reproduction sickness spirochaetales spirochetal spirochetes std syphilis microorganism rendering bacteria cells erythrocyte flagella human infection medical microbe microscopic pathogenic sexual spiral-shaped