What are the diseases that killed the Tasmanian tiger?

Answer 1

Diseases did not kill the Tasmanian tiger. Man did. Human beings hunted them to extinction.

While it's true that humans had a devastating impact on the Thylacine, during the early Twentieth Century wild populations were ravaged by a disease similar to Canine Distemper, this also eventually found its way to many the captive specimens in the world's zoos, wiping out the specimens in both London and Washington. It was as much this as the human toll that led to the species decline.