good and bad bacteria. poster about probiotics

bacillus bacteria bacteriology bacterium bacteroides bad bifidobacteria bifidobacterium bifidus body coli colon enteric enterobacteria escherichia flora germ good gut harmful health healthy helicobacter human illustration intestinal intestine intestines lactic lactobacillus lactococcus medical medicine microbiome microbiota microorganism microorganisms microscope poster probiotic probiotics propionibacterium pylori salmonella small staphylococcus streptococcus thermophilus vector visceral