Episode 296 - Calf Scours Case Study: Diagnosing and Managing Rotavirus - UMN Extension's The Moos Room

Abstract

In this episode, Brad shares a recent case study from the University of Minnesota's dairy research center, where a group of spring-born calves experienced widespread scours. He walks through the onset of symptoms, including diarrhea, depression, and reduced milk intake, primarily in calves on an automatic feeder. Diagnostic testing confirmed rotavirus A as the culprit, ruling out other common pathogens like salmonella, cryptosporidium, and coronavirus. Brad explains the importance of prompt treatment with electrolytes and continued milk feeding, emphasizing that hydration—not antibiotics—is key to recovery from viral scours. He also discusses how CT values from lab results helped indicate viral load and severity. While no calves were lost, the outbreak highlighted the critical role of sanitation, consistency in protocols, and whole-system prevention strategies including vaccination and colostrum quality. Listeners will gain practical tips on treating and preventing scours, especially from rotavirus, and hear an honest account of real-world challenges in calf health management. Causes and prevention of dairy calf scours (https://extension.umn.edu/dairy-youngstock/dairy-calf-scours).