anti-protist anti-protist anti-protist or antiprotistal refers to an anti-parasitic and anti-infective agent which is active against protists. unfortunately due to the long ingrained usage of the term antiprotozoal, the two terms are confused, when in fact protists are a supercategory. therefore, there are protists that are not protozoans. beyond "animal-like" (heterotrophic, including parasitic) protozoans, protists also include the "plant-like" (autotrophic) protophyta and the "fungi-like" saprophytic molds. in current biology, the concept of a "protist" and its three subdivisions has been replaced.