It may not be TB, it COULD be a genetic flaw that is causing this, I suppose there are other diseases, also, that could do it but i don't know what they are. If it were me, though, i would treat it as if it WERE TB even if i didn't know. Be very careful when changing the water (if possible, wear gloves) and make sure you don't have any cuts or scratches on your hands as that is the only way fish TB can actually infect people.
also don't cross contaminate your other tanks as it's very catching among fish and there is no cure.
otherwise, fish with bent spines may need special care such as lower water levels and the like, but they can still have good quality life. Just keep an eye out fr further signs of illness.
best of luck