StephAnn -
For your family's chronic pinworm infections, recommend the Mebendazole (Vermox) Treatment Protocol: http://curezone.com/forums/fm.asp?i=1564827#i.
Pinworm life cycle info, photos, medical references, dosage instructions for adults & children, & tips for hygiene, laundry, & housecleaning are covered in detail.
Several of the pharma links in the protocol are outdated or offline. If you need to order this med, let me know & I'll send you a PM with an updated list of pharma sites.
Good luck in your parasite battle!
Keep us posted on your progress. We all benefit from feedback, & other forum members will gladly offer their experiences & suggestions.
Cheers - ICU