The most prudent option is to have your instructors) trained completely and systematically so that: your instructors conduct safe, meaningful training compatible with agency policy; they understand what they are doing and why; trainees understand what they are doing and tend to use their training.
Definition of protist. :  any of a diverse taxonomic group and especially a kingdom (Protista synonym Protoctista) of eukaryotic organisms that are unicellular and sometimes colonial or less often multicellular and that typically include the protozoans, most algae, and often some fungi (such as slime molds)
Etymology: Gk, protos + zoon, animal. a unicellular protist that ingests food. Protozoa include free-living forms, such as amebas and paramecia, as well as parasites. Approximately 30 protozoa are pathogenic to humans, including Plasmodium, which causes malaria, and Trypanosoma, which causes sleeping sickness.