Diphtheria is considered to be one of the few diseases transmittable between cats/humans. This disease doesn't really exist (anymore) in most of the world, but is unfortunately prevalent (but thankfully not so common anymore) in some developing countries. The reason diphtheria is considered troublesome is initially it just appears like a common cold/cough.
I have tried searching the web quite a bit, but everything I find is about the symptoms of the disease in humans. I want to understand what the symptoms of diphtheria are, in cats.