Hair Sheep (IMAGE) Stanford Medicine Caption The newest revolution in microbiology testing walks on four legs and says “baa”. It’s the hair sheep, a less-hirsute version of the familiar woolly barnyard resident. A new study from the Stanford University School of Medicine finds that not only are these ruminants low-maintenance and parasite-resistant, they’re also perfect blood donors for the microbiology tests necessary to diagnose infectious disease in the developing world. Credit Ellen Jo Baron Usage Restrictions None 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.