These pinworms are the bane of my existence! Two months nothing. Treating monthly now. Took pyrantel last week. Today passed 5 tiny hatchlings. These will never completely go away. Back to treating each week. Just when you think you're in the clear they come back! When I get income tax I'm going to try zapping. Maybe these are from pork. I started eating pork again.I always make sure its well done.