In the article they suggest that a reduced redox potential might be responsble for the growth of BH ( maybe we need to use something to change the redox to normal so the bug won't grow??).
Regarding the huyluronidase that some worms and Blastocystis.hominis use here the article:
Also there are other articles that talk about the protease as a pathogenic factor in Blastocystis hominis and other protozoa.
A lot of folks talk about MSM as a good supplement against protozoa and I believe that it is so because MSM is one important block of the mucosal barrier as well as joint.
In this article, the arsenic salts resulted in 100% eradication of Blastocystis.hominis. It also talks about B.hominis killed one man ( he lost all his liquide by dehydration):