Sample is mucoid Stool infected with Entamoba coli, Giardia lamblia and an organism with galet with two free flagellate. This is important because I want to report it for the first time in my provenance.
In my experience, it is difficult to visualize flagella using iron hematoxylin. Simple Giemsa at pH 8.0 is usually beter for this purpose. Try to perform PCR to make your point, as also Bodo can have the morpholgy you mention!