Harmless bacterium edges out intestinal germ
Clostridium scindens inhibits closely related microbe C. difficile
![Clostridium difficile](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/10/kb_CDiff_free.jpg?fit=860%2C460&ssl=1)
BACTERIA VS. BACTERIA Mice exposed to Clostridium difficile (shown) are protected by a related microbe, C. scindens.
Janice Haney Carr/CDC