TB Infection in Normal and Mutated Zebrafish (image) University of Washington Share Print E-Mail Caption These zebrafish larvae are infected with fluorescently labeled bacteria related to those that cause tuberculosios in humans. The wildtype (normal) fish has optimal inflammation and is able to control infection. In contrast, its siblings have been altered to produce either low or high levels of key mediators of inflammation. Either too little or too much production of these mediators results in difficulty in controlling the infection. Credit Francisco Roca Usage Restrictions For use only by news media, educational institutions and museums covering this finding. Share Print E-Mail 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.