COLONY FORMATION OF BLASTOCYSTIS-HOMINIS IN SOFT AGAR

This is the first description of a method for growing axenized Blastoc ystis hominis as colonies in petri dishes containing soft agar. Blasto cystis cells cultured in two types of agar appeared to show different colonial morphologies as well as differing colony yields. Microscopic examination of the colonies revealed many amoeboid and giant cells. Ma ny cells were also shown to possess thin filament-like structures that appeared to stretch across the central vacuole.