These bacteria may egg on colon cancer

Streptococcus gallolyticus spurred tumor growth in lab dishes and in mice

Streptococcus gallolyticus

GROWTH SPUR  An intestinal bacterium called Streptococcus gallolyticus (white, growing in a petri dish) has previously been linked to colon cancer. Now researchers are getting clues about how the bacterium promotes tumor growth.

© Daniela Beckmann

A bad bacterium may make colon cancer worse.