Microbial Frenemies (image) Rockefeller University Share Print E-Mail Caption Above, particles of the virus ΦNM1, applied at varying concentrations, killed cells in the Staphylococcus aureus "lawn," creating clear plaques. Researchers have shown Staph can detect whether a virus, such as ΦNM1, is destructive or potentially helpful. Credit Zach Veilleux/Rockefeller University Usage Restrictions None 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.