Figure 1 (image) Universitat Pompeu Fabra - Barcelona Share Print E-Mail Caption Counterintuitively, the researchers observed that when the two species of bacteria coexist, their response to the antibiotic is opposite to when they are alone. Credit Image author: Letícia Galera-Laporta. 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.