I think for those drugs to be implicated, you would need to exhibit some level of neuropathy while taking the drug, not some remote time later. In particular, this is true for antibiotics. With the Azulfidine, it appears that it is a rare side effect, occurring early in treatment, but there is documentation of it occurring with long term treatment. Still, I saw no reports of an association of neuropathy after stopping the drug.
In my case, I am a believer in the neuropathies I have to be a direct result of the inflammatory arthritis and bony joint changes I have developed over time. Reducing the inflammation with my medications has actually slowed the progress of this and I currently have no lasting nerve damage, just irritation from nerve root compression.
I don't know about the steroid connection, but would not be surprised, since it is implicated in all sorts of body system breakdowns with prolonged use.
Jan