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Eukaryotic microorganisms

Plantae. Animalia. Fungi. Protista. Monera. Eukaryotic microorganisms. Fungal anatomy: Thalli. hyphae. mycelium. Fungal anatomy: Fruiting bodies. Sporangiospores (sac). Chlamydospores (walled in). Conidiospores (no sac). Important yeasts: Saccharomyces cerevisiae. Thallus

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Eukaryotic microorganisms

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  1. Plantae Animalia Fungi Protista Monera Eukaryotic microorganisms

  2. Fungal anatomy: Thalli hyphae mycelium

  3. Fungal anatomy:Fruiting bodies • Sporangiospores (sac) • Chlamydospores (walled in) • Conidiospores (no sac)

  4. Important yeasts: Saccharomyces cerevisiae • Thallus • Fruiting body: • blastoconidia

  5. Diaper rash “Thrush” Important yeasts:Candida albicans Bauman Fig. 22.10

  6. Important molds: Rhizopus spp. Leboff & Pierce, Figs. 10-4

  7. Important molds: Aspergillus spp.

  8. Important molds: Penicillium spp. conidiophores

  9. Major Groups of “True” Parasites • Protozoans • Single-celled eukaryotes • Malaria, Giardia, Trichomonas vaginalis • Helminths (The Worms) • Multicellular animals • Flukes, Tapeworms, Roundworms • Ectoparasites • Multicellular animals • Live outside the host • Ticks, Lice, Fleas

  10. Protozoan Parasites • Single-celled eukaryotes • Can invade: • Tissues- Trypanosomes, Toxoplasma, Plasmodium • Intestinal lumen- Entamoeba histolytica, cryptosporidium

  11. Protozoans general life cycles Trophozoite(active, feeding) Adverse environment Release of active cellular form Excystment Encystment Cyst formation Moisture, nutrients Cyst(dormant, resting)

  12. Trophozoite Cyst Entamoeba histolytica

  13. Entamoeba histolytica • Epidemiology: Worldwide distribution- Mexico, India, West and South Africa, South America • 10% of the world’s population is infected • Most are asymptomatic (carriers) • 50-100,000 deaths per year • Vector: Flys carry cysts from human feces to human food or water or humans self-infect after touching fecally contaminated items, can be sexually transmitted

  14. Entamoeba histolytica • Reservoir: Humans are the only hosts • Pathologies: • Mild to severe intestinal discomfort • Dysentary (bloody diarrhea) • Can invade and destroy the liver • Treated with Metronidazole (flagyl)

  15. Trypanosoma brucei African sleeping sickness

  16. Trypanosoma cruzi • Epidemiology: • Mexico to S. America • 16-18 million people are infected (45,000 die per year) • Vector: Reduviid bug (aka. kissing bug)

  17. Trypanosoma cruzi(Chagas Disease) • Reservoir: rodents, armadillos, dogs, cats • Pathologies: • Inflammation at bite • Swelling of the eyes • Fever, malaise • Enlarged Heart • Heart Failure

  18. Plasmodium spp. malaria schizont Infected RBC

  19. MALARIA • Kills 1-2 million/year • Loss of productivity • Vaccines slow • Mosquito abatement • Swamps

  20. Plasmodium Life Cycle

  21. Co-Incidence

  22. Toxoplasma gondii Toxoplasmosis Bow-shaped cells

  23. Giardia lamblia a.k.a. Giardia intestinalis giardiasis

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