Since stool lab tests are virtually useless and costly, you could try another method. I just remembered something from last year by a poster (unfortunately, I don’t remember who), that could prove to your doctor that you have parasites. Instead of fishing through the toilet searching for lochness monsters, you can do this simple experiment! I have not personally done this nor do I have an interests because I’ve seen enough. The poster though was very convincing.
Supplies: 1 q-tip, 2 very small ziplock bags or vial, and 1 label.
According to the posters, he/she took a generous q-tip swap from the rectum after elimination and placed it in a ziplock bag. Sometime within 2 weeks there were hatchlings. There was absolutely no doubt that there was a problem, according to the person.
Since doctors want proof of everything (and I’m sure you do too), you could do the following. Make sure that you label the bag with the date and time, and your name. Get enough stool on the q-tip in case your doctor wants to send the results out to a lab, to check whether or not it is human stool (we know how suspicious they are), and to find out what type of parasites they are. Also double or triple ziplock the original bag, or vial. If the results come back negative from the lab… well, what else can be said about our fantastic labs!