I hope you will get it tested ASAP. There are a few places you can order Chytrid test kits from.

Amphibian Chytrid and Ranavirus Testing Kit | Josh's Frogs

dendrobati

If he has it, treatment is pretty straightforward, using Lamisil baths. http://www.frogforum.net/pacman-frog...tml#post135965
I would personally begin right away, as he might not live long enough for you to get the test kit, send it in, and get the results (though you should still test, just after you've begun treatment).

You need to get him into a hospital setup right away, and you will have to thoroughly disinfect it following every treatment. Nothing in it but water and maybe a ceramic hide is probably best, as you would have to discard anything organic after each treatment.

The fish tank in question should not be considered "clean" until everything organic in it has been discarded and it's been completely disinfected. Don't put any other frogs in it until that time. Whenever you do water changes for it, you should always put the waste water into a bleach solution before discarding it, so that you are not releasing the fungus into the environment and potentially infecting local frog populations. Anything you discard from the frog's hospital tank must be treated in the same way.

In the future, whenever you get a new frog, you should always quarantine it, for probably six weeks at minimum, and you should always test it for Chytrid. During quarantine, and before getting test results back, you should always treat the waste water as described above, though many advocate doing that with all frog waste water, as they can be carrying other pathogens that could be harmful if released into the environment.

I hope this isn't more information than what you were looking for, and hopefully you can still save the one little frog. Good luck, and please let us know what happens.