Introduction

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Introduction

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Introduction

  1. 1. Microbiology www.freelivedoctor.com
  2. 2. <ul><li>Microbiology is the Science that studies Microorganisms. </li></ul><ul><li>Microorganisms, roughly, are those living things that are too small to be seen with the naked eye. </li></ul><ul><li>Microorganisms cannot be distinguished Phylogenetically from “Macroorganisms” </li></ul><ul><li>For example, many fungi are microorganisms, as well as all bacteria, all viruses, and most protists. </li></ul><ul><li>Microbiology is more a collection of techniques: </li></ul><ul><li>Aseptic technique </li></ul><ul><li>Pure culture technique </li></ul><ul><li>Microscopic observation of whole organisms </li></ul><ul><li>A microbiologist usually first isolates a specific microorganism from a population and then cultures it. </li></ul>www.freelivedoctor.com
  3. 3. Scale of Microbes www.freelivedoctor.com
  4. 4. Types of Microorganisms <ul><li>Bacteria </li></ul><ul><li>a.k.a., eubacteria (“true” bacteria) </li></ul><ul><li>a.k.a., domain Bacteria </li></ul><ul><li>Archaeabacteria </li></ul><ul><li>a.k.a., domain Archaea </li></ul><ul><li>Single-celled members of domain Eukarya. </li></ul><ul><li>Protozoa </li></ul><ul><li>Microscopic Algae </li></ul><ul><li>Microscopic Fungi </li></ul><ul><li>Viruses </li></ul>www.freelivedoctor.com
  5. 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. 6. Rob-Shaped Bacteria www.freelivedoctor.com
  7. 7. Spherical Bacteria www.freelivedoctor.com
  8. 8. Spiral-Shaped Bacteria www.freelivedoctor.com
  9. 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. 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. 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. 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. 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. 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

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