Please help! Hurt Cory cat!

[Lindsey577]

Hi everyone, I just went and checked on my fish, and my poor Cory catfish looks like he's missing the top of his mouth! Please tell me what to do.. I'm so worried... Here's a couple pictures. Sorry about the quality!

 

[jlbfish]

Looks like Columnaris (cotton mouth). Is it spreading quickly or slowly? Do any other of your fish show signs? Hopefully someone with some more experience will give you some more information. This is an article I was pointed to when I thought my fish had it.

Columnaris (Flexibacteria); Aquarium, Pond Treatment, Prevention; Fungus, Saprolegnia