So the difference between it and and ringworm is the smell. It is incredibly itchy and will spread to people quite readily. It looks very like the bacterial infection which is why they confuse the conditions. It is quite easy to treat. You don't have to bath them, which is what you used to have to do.
Bathing is a horrible thing to do to a fully grown wombat.
You can treat them with injectible pesticides now. So mange does occur in wombats but what we see described as mange in possums is in fact bacterial. Usually you have a discharge from the ears. We have seen foreign bodies down the ears of two kangaroos. So they can get conventional ear problems too.