Apxr's Comments & Personal Observation
This is a great post that was originally made on the Parasite Forum.
APXR COMMENTS
http://curezone.com/forums/fm.asp?i=748747#i
One of the techniques looks for ova (eggs) rather than for the actual parasites, which most personnel tend to mistake for "fibers" when inspecting them directly under the scope, as I've observed, but I can't speak about every lab or m.d. of course.
In most cases where PERSONALLY I've found a great deal of parasites by visual inspection without any doubt about their presence and with photographs of them showing their structures unmistakably -including digestive tracts and such-, the labs have reported NO parasites AT ALL in, I'd say, 95 cases out of 100. I know better than to confront docs with this data, of course.
In a commercial clinical lab where I know personnel, I've been told by them that what they do to test for parasites is: they take a few grams of stool, they mix it thoroughly with Lugol's solution and let it rest for a couple of minutes with a slide resting on top of the uncovered container, waiting for ova to float up towards the slide. Then they take the slide and look at it under the microscope, and if ova are present and visible, they report "parasites", and then the 'level' of the infestation, according to the number of eggs found compared against some fixed count.
Of course, in this manner physical worms will NEVER be visible, or any other structure in the stool for that matter, how about that?