microflora bacteria escherichia coli and bacterias s

anatomy digestion human illness internal intestine pathology presentation research scientific stomach tract diarrhea medical science sickness medicine health micro microbiology bacterial biology microscope laboratory disease illustration microbes element computer graphic symbol fever microorganism cell macro poster small bacterium infection realistic background coil virus epidemic gastroenteritis organism mycobacterium pyelonephritis sepsis shigella microflora bacteria escherichia coli bacterias shapes e coli gram-negative rod-shaped part intestinal normal flora causative agent inflammations different locations