Bovine Viral Diarrhea Merck Veterinary Manual

The calf shown below was presented with ataxia, intention tremors, and hypermetria; all signs were present since birth. The second image shows a normal bovine calf brain on the left and the brain from this calf on the right. Which one of the following choices is the most likely cause of the disorder in this calf? - Organophosphate toxicity - Border disease - Bovine viral diarrhea virus - Copper deficiency - Caudal occipital malformation syndrome You chose C, the correct answer! In utero infection with BVD is a common cause of cerebellar hypoplasia in cattle. Other causes are bluetongue, Akabane, or Wesselsbron viruses.

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Caudal occipital malformation syndrome is a disorder seen mainly in Cavalier King Charles Spaniels. The malformed occipital bone causes crowding at the caudal fossa and cerebellar herniation at the foramen magnum. Refs: Mayhew, Large Animal Neurology, 2 nd ed. 252-3 and the Merck Veterinary Manual online edition.Images courtesy Dr Jerry J Callis, Dr Brian WJ Mahy and the.

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