<i>Escherichia coli</i> (IMAGE) Instituto Gulbenkian de Ciencia Caption These are Escherichia coli colonies growing on a petri dish. Credit Sílvia Mendonça Usage Restrictions As complement to news reports related to this press release 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.