intestinal bacterial flora. good and bad bacterias.

abdomen bacillus bacteria bacterial bacterium bad bifidobacteria biological biology clostridium coli difficile digestion digestive disease enterococcus escherichia faecalis fermentation fibidobacteria flora gastrointestinal germ good gut human illustration infection infographics internal intestinal intestine lactobacili lactobacillus lampylobacter large medical microbe microbiology microflora microorganism organ overgrowth probiotic small system tract vector virus