"Figure 2.43: Ringworm presents as a raised ring, which is gray or brown on brown or black skin (a), and red on lighter skin (b). Centers for Disease Control and Prevention. Public Domain. Figure 2.44: A scanning electron micrograph shows many Giardia parasites in the trophozoite, or feeding stage, in a gerbil intestine. modification of work by Centers for Disease Control and Prevention. Public Domain. Figure 2.45: In the sexual/asexual life cycle of Eimeria, oocysts (inset) are shed in feces and may cause disease when ingested by a new host. “life cycle,” “micrograph”: modification of work by USDA. Public domain. Figure 2.46: Paramecium spp. have hair-like appendages called cilia for locomotion. (c) Rice University. OpenStax Microbiology. CC BY."