Do you think Rav Belsky doesn’t know about these in full color parasites? Do you think none of our g’dolim and poskim, past and present, needed to read this book in order to know what to look for?
I know when I asked Rav Sheinberg he referred me to Rav Vai. This was years ago when Rav Sheinberg was holding in all of shas and poskim. Rav Revach who is as well an expert clearly says the same. These are the psakim of Rav Elyashiv as well. The shayla is not only halachic, it’s a matter of professional expertise.