clostridium difficile bad gutbacteria microflora of intestine

analysis bacillus background bacteria bacterial bacteriology bacterium bad biological biology biotechnology blue care cell cells clostridium difficile disease epidemic germ germs graphic gutbacteria health healthy human icon ill illustration infection infectious intestine isolated laboratory medical medicine micro microbe microbes microbial microbiology microflora microorganism microorganisms microscopic organism parasite pathogen sanitary sickness sign symbol test vector white