Most likely they are lice and can be eliminated with sevin dust. I know nothing about turkey's. That being said, I dont know if you have to dust the whole bird but I suppose you would...just like a chicken. Redust in 10 days to kill nits that have hatched since the first dusting. If you have other birds, I'd inspect them as well along with their nesting/roost areas and dust in the same manner. Lice are species specific and cannot survive off its host and will eventually die.
Whether you inform the NPIP tester or not, is your decision.
If I were in your shoes, I would call him and let him know what happened and what actions you are taking to eliminate the problem and plan to follow up with retreatments as necessary. Good luck.
