1. Introduction to Parasitology

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

4. 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

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

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

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