magnifying glass focused on microflora in human small and large intestine. intestinal bacteria and viruses.

bacteria intestines magnifier organ digestive human vector intestinal germs health colon medical internal bad flora healthy infection intestine good digestion gastrointestinal illustration probiotics anatomy system eubacterium medicine coli microbe bacterium biology body disease microflora bacillus tract probiotic virus microorganism microbiology science bifidobacterium isolated lactobacillus enterobacteria flat inside search sick