HIV Drug Resistance Test (IMAGE) Duke University Medical Center Caption The test identifies which drug-resistant strains of HIV are harbored in a patient's bloodstream. Viruses that have evolved resistance to HIV drugs are tagged to appear green, while those that have not are tagged to appear red. Credit Duke University Medical Center News Office Usage Restrictions Credit Duke University Medical Center News Office 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.