Brandi Wren (IMAGE) Purdue University Caption Brandi Wren, a visiting scholar at Purdue University, spent a year following vervet monkey troops through Loskop Dam Nature Preserve in South Africa to better understand interactions between social grooming and gastrointestinal parasites. Credit Purdue University photo/Brandi Wren 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.