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Introduction

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Introduction

Introduction


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  • Ha ha, my lecture! :-) You're welcome! Sincerely, Stephen T. Abedon, Ph.D.!
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  • 1. Microbiology www.freelivedoctor.com
  • 2.
    • Microbiology is the Science that studies Microorganisms.
    • Microorganisms, roughly, are those living things that are too small to be seen with the naked eye.
    • Microorganisms cannot be distinguished Phylogenetically from “Macroorganisms”
    • For example, many fungi are microorganisms, as well as all bacteria, all viruses, and most protists.
    • Microbiology is more a collection of techniques:
    • Aseptic technique
    • Pure culture technique
    • Microscopic observation of whole organisms
    • A microbiologist usually first isolates a specific microorganism from a population and then cultures it.
    www.freelivedoctor.com
  • 3. Scale of Microbes www.freelivedoctor.com
  • 4. Types of Microorganisms
    • Bacteria
    • a.k.a., eubacteria (“true” bacteria)
    • a.k.a., domain Bacteria
    • Archaeabacteria
    • a.k.a., domain Archaea
    • Single-celled members of domain Eukarya.
    • Protozoa
    • Microscopic Algae
    • Microscopic Fungi
    • Viruses
    www.freelivedoctor.com
  • 5. Types: Bacteria Description : eubacteria, archaeabacteria, Gram-negative, Gram-positive, acid fast, cyanobacteria Types : procaryotes, absorbers, wet conditions, animal decomposers, cell walls, unicellular Nutrient Type : chemoheterotrophs, photoheterotrophs, chemoautotrophs, photoautotrophs Durable state : endospores (some) Diseases : tetanus, botulism, gonorrhea, chlamydia, tuberculosis, etc., etc., etc. www.freelivedoctor.com
  • 6. Rob-Shaped Bacteria www.freelivedoctor.com
  • 7. Spherical Bacteria www.freelivedoctor.com
  • 8. Spiral-Shaped Bacteria www.freelivedoctor.com
  • 9. Types: Cyanobacteria Description : blue-green algae Types : photosynthetic aquatic procaryotes, green lake scum, cell walls Nutrient Type : photoautotrophs Durable state : ? Diseases : none www.freelivedoctor.com
  • 10. Types: Algae Description : photosynthetic aquatic eucaryotes, cell walls, both unicellular and multicellular types Types : brown, red, green, diatoms, dinoflagellates, euglenoids Nutrient Type : photoautotrophs Diseases : Some poisonings associated with unicellular types: Alexandrium causes Paralytic Shellfish Poisoning (PSP), Dinophysis causes Diarrhetic Shellfish Poisoning (DSP), Pseudo-nitzschia multiseries causes Amnesic Shellfish Poisoning (ASP) [some would describe some as protists] www.freelivedoctor.com
  • 11. Types: Fungi Description : yeasts (unicellular fungi), molds (filamentous fungi) Types : eucaryotes, absorbers, dry conditions, plant decomposers, cell walls, ~100 human pathogens Nutrient Type : chemoheterotrophs Durable state : spores Diseases : mycoses: candida, ringworm (pictured), athlete's foot, jock itch, etc. www.freelivedoctor.com
  • 12. Types: Helminths Description : Flatworms (platyhelminths), roundworms (nematodes) Types : metazoan (multicellular animal) parasites, engulfers and absorbers Nutrient Type : chemoheterotrophs Durable state : ? Diseases : trichinosis, hook worm, tape worm (pictured are scolex-heads of), etc. www.freelivedoctor.com
  • 13. Types: Protozoa (Protists) Description : Unicellular and slime molds, flagellates, ciliates Types : eucaryotes, parasites, engulfers and absorbers, wet conditions, no cell wall, ~30 human pathogens Nutrient Type : chemoheterotrophs (some classifications include some photoautotrophs as well) Durable state : cysts (some) Diseases : malaria, giardiasis, amoebic dysentery, etc. (shown are harmless--to us--protist components of pond water: Amoeba , Blepharisma , Paramecium , Peranema , & Stentor ) www.freelivedoctor.com
  • 14. Types: Viruses Description : Not cells but enveloped or non-enveloped Types : acellular, obligate intracellular parasites Nutrient Type : not applicable Durable state : virion particles, some can encase in durable state of host Diseases : common cold, flu, HIV, herpes, chicken pox, etc. www.freelivedoctor.com