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Common Problem in Calves
Diarrhea is a common problem in newborn calves. Newborns have insufficient natural immunity to combat incursions of microorganisms that can invade the intestinal tract. E. coli and Salmonella spp., Clostridium perfringens Types A, B, C, and E are common bacterial causes of diarrhea. Clostridium perfringens Types A, B, C, and E can cause sudden death syndrome in calves with only occasional signs of diarrhea.
Cryptosporidium spp. protozoa are potential causes of diarrhea. Rotavirus and coronavirus are also common sources of mild to severe diarrhea. Each has the potential to kill a young calf. Acute forms can kill in as little as 12 hours. Most outbreaks involve more than one microorganism and are difficult to diagnosis.
In older calves and cows, Salmonella spp., Johne's disease or paratuberculosis, Bovine Virus Diarrhea (BVD), internal parasites, and coccodia can be causes of enteric diarrhea. Each case can be acute but it is more likely to be chronic.
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