Anthrax-killing Tsamsa Virus (image) University of California - Davis Caption The newly-isolated Tsamsa virus is a bacteriophage that infects and kills the anthrax bacterium and close relatives that cause food poisoning. It is one of the largest bacteriophages ever discovered. Credit Jochen Klumpp, ETH Zurich, Switzerland. Usage Restrictions May be used with credit. 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.