KATERYNA KON / SCIENCE PHOTO LIBRARY KATERYNA KON / SCIENCE PHOTO LIBRARY
Computer illustration of the human digestive system and a close-up view of bacteria found or infecting intestine. Some bacteria, such as Lactobacillus and Bifidobacterium, have beneficial functions and are part of normal microbiota. Others, such as Helicobacter pylori and Shigella, cause disease.
Model release not required. Property release not required.