Bacterial conjugation (IMAGE) University of Maryland Baltimore County Caption Bacterial cells (black outlines) contain plasmids (red) in addition to their main genome (green). A conjugative plasmid can transfer genetic material between cells as shown here, which can spread antibiotic resistance genes among species. In a new study in Antibiotics, researchers used a novel computational technique to investigate the origin and spread of antibiotic resistance genes. They found that genes on conjugative plasmids were most likely to spread, as were highly specialized resistance genes. Credit Zappy's Technology Solutions Usage Restrictions Credit must be given to the creator. License CC BY 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.