Ringworm - not a worm, not often a ring- Just a bad name really!
Diseases have been around for a long time, longer even than microscopes and genetic testing. This has resulted in a number of names for illnesses that are not very helpful, some can be even misleading.
Misleading Names
‘Cat flu’, for example, is actually a number of different viruses and bacteria (none of them influenzas) that can cause similar symptoms in cats.
‘Kennel Cough’ is much the same in dogs and not many dogs that get it have actually been in kennels.