Introduction to Parasitology

Key Terms in Parasitology Host Obligate parasite Facultative parasite Protozoa Nematodes Helminthes Cestodes Trematodes Arthropods Infestation

Introduction to Parasitology Parasites that infect humans have various classifications, characteristics, and life cycles Protozoans are microscopic one-celled organisms that are categorized according to their method of movements Ciliates – the only parasitic ciliate that causes disease in humans in Balantidium coli Flagellates – three of the most common and medically significant include Giardia lamblia, Trypanosome sp. and Trichomonas vaginalis

Introduction to Parasitology Amoeba –include the pathogenic amoeba Entamoeba and Endolimax which cause dysentery in humans

Introduction to Parasitology Helminthes Cestodes (flatworms) Nematodes (roundworms) Trematodes (flukes)

Introduction to Parasitology Arthropods Host Parasites Insects – mosquitoes, lice, and fleas Arachnids – ticks and mites