Even though Amelia's quarantine is technically completed, they won't be in the same cage for a few more months (They aren't quite close enough in size). I am going to be taking her to the vet soon to make sure she is clean, but I'm not quite sure what tests need to be done. We have only taken our other glider to the vet once, so I'm not exactly an expert on the subject.
Be sure to ask how many gliders your vet has seen/treated and if they would be open to consulting another glider knowledgeable vet if the occasion were to come up.