I would treat enclosure with PAM and if concerned the snake with reptile relief.

Many wild BP's live their whole life with ticks. I talked to someone who dealt with imports and it is fairly common but not as serious as mites. Mites are not natural to BP's as they dont exisit in Africa so they can overwhelm the snake and cause more serious health problems.

Of course no one wants ticks in their collection but as Tim stated you could have them for years and not know or cause any serious threat. Granted tick isnt carriing some disease. You would have known by now if that was the case.

My vet once told me this is why you never want to house different species together because a parasite that is relitively harmeless to one species could devastate another. I had asked him years ago if I could house a beardie and tortoise together since thier husbandry is similar. He said for example coccidia is quite commomn in beardies but would ravage a tortoise (just as ticks are common on BP's).