spore-forming bacteria clostridium

clostridium tetani perfringens botulium difficile antibiotic resistant resistance nosocomial bacteria microbe biology medical microscopic bacterium science micro medicine human microbiology infection organism scientific macro illness sick microscope sickness disease cells experiment research closeup rodshaped tetanus gas gangrene wound anaerobic infections spores anaerobes fever microorganisms pathology biological illustration botulism clostridia