A flock from a turkey farm is presented with a mysterious illness. Several dead birds are notable, mostly younger animals.

Sick turkeys are listless, with drooping wings, unkempt feathers, yellow droppings. Sick older birds are emaciated.

Necropsy shows a yellowish green, caseous exudate in the ceca, cecal ulcerations and thickening of the cecal wall.

A typical liver looks like the image below.

What is the diagnosis?

Click here to see image

Click here to see image