Station 5

Lymph node from a sheep

Question 1: Describe the lesion.

The lymph node is moderately enlarged, and its normal architecture is effaced by an accumulation of abundant, slightly laminar, crumbly, pale white to tan material.

Question 2: What type of necrosis is illustrated here?

Caseous necrosis

Question 3: Name the most likely organism?

Corynebacterium pseudotuberculosis.

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