I should have made it more clear as to how I was bitten. She was curled up in a ball, barking and screaming and had no control over her movements. I was bitten when I reached down to see if her harness or collar was causing this to happen. Because she was in a constant and steady painful barking mode, her mouth was snapping open and closed rapidly. From what I have read and from what I have been told by our vets, it is not uncommon for a dog to bite during a seizure. It was my mistake to put my hand near her face and mouth. If I had just waited, she would have come out of the seizure and I would not have been bitten.
Whoever witnesses a seizure should also be aware of their own safety as it is not unusual for dogs to bite while seizing. Do not attempt to put anything in the dog's mouth during a seizure.