Hello - you are not nuts! You should be proud of trying to take control of your health! Not to scare you, but you might have Tapeworms too. Most adult species of Tapeworms are only 1/2 inch long and can cause an itchy anus too. parasites in humans are perfectly normal - ALL animals host parasites and after all, aren't we humans just animals too? I invite you to come over to the Ask Humaworm Forum here on CureZone and just read the postings there. We deal mostly with types of parasites, how we get them, what the symptoms are, how to get rid of them and so forth and so on. I will tell you now - I sell a product, but I don't want that fact to scare you away from the forum - or from me for that matter! You just use whatever you are most comfortable with.
Read, read and read some more. I'll try to answer any questions about parasites that you may have. I don't know anything about Puristat, but if it is formulated to kill parasites then you are heading in the right direction. Colon cleansing will not kill parasites, but it sure does help knock them loose from the colon and move them on out!
If you prefer to email me then please do so - I will help you in any way I can.