I know this has nothing to do with snakes or your collection but... a reputable herp vet told me that he had done a large study on Crested Geckos and at least 50% of all Cresteds in captivity are positive for pinworms.

He also told me that if your animals are asymptomatic that there is no reason to treat them. My theory is that a lot of reptiles in captivity have parasites in some manner and usually the animal may live its whole life without you knowing. When an animal gets stressed or is kept in filthy conditions where it is in contact with it's own feces the parasite load can cause a health problem.