You are worried your hamster is sick from the Aspergillus Fungus does Baytrill help with that?

No. Sorry, but Baytril (enrofloxacin) is an antibiotic and won't have any action against Aspergillus (a fungus).

If the hamster is showing symptoms and the fungus is the cause, it is probably too late already.

But you would need a veterianry assessment to be sure of what you are dealing with.

Prevention is the key -- avoiding high humidity in the cage environment. Often related to excessive urine buildup or spoiled food in the cage / tunnels.