Urgent: Fish looking very ugly!

[Jet]

Got home today and noticed some of my cardinal tetras have a white worm thingie wrapped around their mouths... it doesn't move and is identical to the white worms you feed to fish/fry. Its looks like its under the cardinal tetras skins, rather then actually externally attached.

Now i haven't had a diease like this ever before! and i have no idea what to treat it with... can someone possibly recommend what it is or what to medicate with.

There is albino BN in the tank and gupp[ies and platies but they appear 100% fine... which makes me rule out any potential water related problems.

[Jet]

Ops should be in the emergency room, can someone please relocate.

[sammigold]

Any photos? I know it can be hard as they are such small fish but It doesnt sound like anything I've ever seen, although when you mention mouths and cardinals to me I automatically think of columnaris, which can make them look like their mouth is being eaten away.
Here is a link to columnaris hopefully it may help.
http://freshaquarium.about.com/cs/disease/p/columnaris.htm

hth