Infected mammary glands under microscope (IMAGE) Iowa State University Caption Microscope images of mammary gland tissue taken from a dairy cow infected with highly pathogenic avian influenza are magnified by 200 times on the left and 400 times on the right. On the left, cells infected with influenza are turquoise and flu receptors are magenta. On the right, infections are bright yellow and receptors are bright red. Credit Christopher Siepker and Tyler Harm/Iowa State University Usage Restrictions For use with articles about this research. License Original 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.