The Four Eukaryotic Microbial Categories: Protozoa, Fungi, Helminths and Algae Describe each of the eukaryotic microbial groups and their major features. Give 2 examples of pathogenic (disease causing) species for each. Protozoa: What is a protozoan cyst? Protozoa are classified by how they move. For each category, give at least one example of a human pathogen..