bacteria bacteroides fragilis, the major component of normal microbiome of human intestine

anaerobe anaerobic antibiotic bacteria bacteriology bacteroides biology bowel capsule colitis colon colorful component diarrhea disbacteriosis disbiosis dysentery education eubiotic flora fragilis gramnegative gut ileum illustration intestine major man many massiliensis medical medicine microbe microbiology microbiome microflora nonmotile normal normobiocenosis obligate probiotic rectum science treatment