pneumococcal bacteria (IMAGE) University of California - Santa Cruz Caption Researchers developed an inducible CRISPR interference system to turn off individual genes in the bacteria that cause pneumococcal pneumonia. In the bacteria in these images, the system was used to control the expression of different fluorescent colors. Credit J. Kimmey Usage Restrictions For use only with news coverage of this research License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.