silhouette of a human with skin flora,microorganisms which naturally colonize the human skin

allergen animal bacillus bacterial bacteriology biological biology body colonize colony dermatological dermatology disease diverse epidemic flora floramicroorganisms fungal germ growing growth harmful human hygiene illustration immune layer life living microbe microbiology microorganism microscope microscopic naturally organism pore protective rendering resident rod silhouette skin smell species sweat symbiotic tissue unhygienic unicellular variety virus washing which