bacteria bacteroides fragilis

bacteroides eubiotic gramnegative gut ileum illustration jejunum duodenum large intestine major man education many medicine microbe microbiology nonmotile normal normobiocenosis obligate probiotic rectum medical science dysentery diarrhea microbiome fragilis bowel disbiosis bacterial overgrowth colitis microflora anaerobic colon flora treatment anaerobe bacteria biology antibiotic bacteriology 3d diagram poster background microscope