Hi hermom,
GABHS infection is extremely common in young school aged children so it's going to be virtually impossible to keep a child from having contact at all. The newer quick strep. tests are much more accurate than the old ones. There was a time here that our doc. would only use blood samples but that has changed.

As far as I know also, there would need to be evidence of several elevated titres for a doctor to consider PANDAS or even think about prophylactic antibiotics. Antibiotics kill bacteria so unless you feel that she's an asymptomatic carrier I'm not sure how much good an antibiotic is going to do right now.

Bear in mind also that many people who have tics or ocd will find that their symptoms exacerbate with illness or immediately after an illness. Some people find that when they have a fever though that their tics subside a little but are then followed with a flurry when the fever is gone.

If your daughter had positive titres recently with a blood test then they should be followed up. I think that needs to be done several times. I'm not really sure what she's had done although you mention that quick strep. tests always come back negative. "In the past she doesn't show up as strep on the quick swab test". What have her blood tests shown???

You mention about the Neurologist. If you're concerned then I would contact her/him about this and get as much up-to-date information.

http://intramural.nimh.nih.gov/pdn/web.htm