As you sated in your original post, this is probably a one time thing. If you have removed the tick, and inspected your snake for others, and found none, then I would say you are in the clear. It is a pretty rare occurance from my experience. We have been keeping Ball Pythons since 2003, and currently have (including hatchlings from this year) over 400 Ball Pythons, including about 10-15 LTC (a few of which are more than likely WC). In that number, we also have about 40 CH females that we bought as babies in 2003, 2004 and 2005. With all of that siad, I have found a grand total of 2 ticks in my collection, and both of those were found on females this year after laying eggs.