B12 2 (IMAGE) Rice University Caption Rice University researchers (from left) Ryan Lee, Alexey Revtovich and Natasha Kirienko showed how a dietary deficit of vitamin B12 harms the health of nematodes at a cellular level, leading to an increased risk of infection by two potentially deadly pathogens. Credit Jeff Fitlow/Rice University Usage Restrictions None 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.