Diagnostic Exercise 1

Case 2 (a)

This slide is from a calf, perhaps eight days to two weeks or some such age.

• Make a set of observations and then interpret them.
• Having done that, try to reconstruct a likely pathogenesis for this lesion beginning with a healthy calf.
• Are there other external observations that you might make to help affirm a suspicion?
• What do you suppose this calf would look like clinically?

Key observation -- meninges are clouded. There is severely exudative meningitis: recognition of pathogenesis is essential to clinical management of the problem in a herd, flock, drove, or litter.