I've compiled a little list of all the common infectious diseases in sheep. I've linked each disease to a relevant source relating to it, all you need to do is click on the link. I try to link you to the most reliable, scientifically sound websites! I hope it helps!
Infectious diseases in sheep
Caseous Lymphadenitis (CLA), Corynebacterium pseudotuberculosis
Foot and Mouth Disease (FMD) - exotic
For the little lists of infectious diseases in cattle, click her