Sorry to be graphic but I'm trying shock tactics as I'm so fed up and feel the need to raise awareness...
Up to 40% of children AT ANY ONE TIME are thought to have threadworms. Do you know if yours is one of the 40? Do you know the symptoms? Did you know the eggs that are spread via fingers and mouths are invisible and can be on loo flush handles, clothes, food, hands etc etc etc? You do not need to have played in soil, stroked an animal or touched anything 'wormy' to catch them. In fact you simply need to have been to a place where there are other children. Even the most scrupulous hand washing regime cannot always protect against the odd stray dirty finger in the mouth.
My kids have yet again been infected. I'm absolutely sick of the rigmarole of boil washing all the sheets, towels etc etc and dosing the family with drugs.
Parents and children all seem so aware about headlice - we're all quite happy to admit to that these days, aren't we? - yet mention thread worms and a deathly hush falls across the school playground. No info comes from schools about this although we get termly letters pleading with us to check for nits.
In case you don't know - main symptom is an extremely itchy anus particularly at bedtime. If you check you may actually see the little b#strds on loo paper, poo or anus itself. If one member of the family has them it is highly likely that they've been passed around so treat the others (including adults) even if there are no symptoms, change all the bedding, towels, pyjamas etc
Perhaps going round with a banner 'My kids have had threadworms' is a little OTT? but if just one person reads this thread and thinks 'could my ds/dd be infected?' checks and treats then perhaps it'll prevent a few more of your children having to go through the same thing.