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An introduction to parasitic protozoa: Form, function and life cycles

An introduction to parasitic protozoa: Form, function and life cycles. BIOL 413. Taxonomists currently recognize 7 phyla. Sarcomastigophora , which includes the subphyla Sarcodina and Kinetoplastida Labyrinthomorpha , Apicomplexa , Microspora , Ascetospora , Myxozoa , Ciliophora.

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An introduction to parasitic protozoa: Form, function and life cycles

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  1. An introduction to parasitic protozoa: Form, function and life cycles BIOL 413

  2. Taxonomists currently recognize 7 phyla • Sarcomastigophora, which includes the subphyla Sarcodina and Kinetoplastida • Labyrinthomorpha, • Apicomplexa, • Microspora, • Ascetospora, • Myxozoa, • Ciliophora

  3. Of these groups, 4 are considered most important sources of human or veterinary parasites • Sarcodina (Amoebas, e.g. Entamoebahistolytica) • Mastigophora(Flagellates, e.g. Trypanosomaspp., Leishmaniaspp., Trichomonasvaginalis) • Apicomplexa (possess an apical complex, e.g. Plasmodium spp., Eimeriaspp., Isosporaspp.) • Ciliophora(ciliated protists, e.g. Balantidium coli, Ichthyophthirusmultifiliis)

  4. Distinguishing characteristics. I.: Modes of locomotion

  5. Distinguishing characteristics. II.: Modes of reproduction

  6. Distinguishing characteristics. III. Modes of metabolism

  7. Examples. 1. Sarcodina

  8. Examples. II. Mastigophora) Trichomonas vaginalis Trypanosoma spp. in blood Giardia lamblia (L) trophozoite; (R) cysts

  9. Examples. III. Apicomplexa Plasmodium spp. life cycle Insect & human stages

  10. Examples. IV. Ciliophora Balantidium coli trophozoite Balantidium coli cyst Ichthyophthirus multifiliis

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