Staph (IMAGE) University of California - San Diego Caption The <em>Staphylococcus aureus</em> pan-genome -- a survey of 64 strains -- is made up of a "core" genome and a "dispensable" genome. Credit NIAID 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.