It can, it depends on what is causing it. The vet would swab and pinpoint the cause in order to prescribe the correct medication. Sometimes, frogs are beyond the point of saving, but it doesn't sound like this guy is, so long as you get help for him soon.
Here is the website of the vet that I would recommend if you're in the area - http://brookfallsveterinary.com/ - They would be honest with you if there is nothing you can do.