Instead, they are digested in the colon by normal intestinal bacteria.

The excess oil causes normal bacteria on the skin to flourish, creating inflammation.

Some studies have identified mutations that occur, as these strains are derived from normal bacteria.

Antibiotics also can change the normal bacteria in your body.

In older children and adults the normal intestinal bacteria suppress development of C. botulinum.

To test this, they compared mutants that could not develop pili to normal bacteria.

You may get it when the body's immune system has an abnormal response to normal bacteria in your intestine.

This agent could be grown in chicken embryos and passed through a filter that excluded normal bacteria.

It may result from an abnormal response by the body's immune system to normal intestinal bacteria.

They think it might be caused by the immune system overreacting to normal bacteria in the digestive tract.