You may want to ask some questions on our PANDAS forum Kevin
http://www.latitudes.org/forums/index.php?showforum=17
Here is an excellent website for info http://www.pandasnetwork.org
as well as this one, started by the mom of the girl who got a lot of media attention for her long lasting "sneezing tic" which turned out to be strep related http://www.pandasresourcenetwork.org
With TS, sometimes tics can reappear with no clear rhyme or reason....but usually if one digs deep, there is a trigger somewhere.
With PANDAS kids, even exposure to strep can trigger symptoms.
So, especially when tics re-emerge after some type of illness, always worth investigating that avenue!