I have noticed similar seed-like objects in stool that is looser and sticker. I have done 3 parasite purges all producing evidence of white helminths. The first was 3-day pineapple only diet, second was 3-day Nitazoxanide (available in Mexico) and thirdly 3-day Mebendazole. Subsequent to all there was some migration of helminths and a (stressful!)penetration of genital skin - I just saw a tail sticking out? The last purge produced some small oblong objects passed by themselves that seemed to sprout white tails? after 2-24 hours in a pillbottle in a dark cupbooard.
BUT - Stool specimen after first 2 purges was negative & I think the Dr. thinks I'm imagining things!