treponema pallidum the pathogen of syphilis bacterias together with signs of male and female genders in the circle label

bacteria treponema vector medical bacterium biological design epidemic health illness illustration infection macro micro microbe microorganism microscopic pallidum pathogen protection scientific sex syphilis sexually transmitted spirochaete sickness genital syphilitic quarantine scattered genitals organ diagnosis sample structure bejel yaws spiral man woman gender symbol sticker icon label