black01 - Microbiology What is Microbiology? Microbiology...

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Microbiology
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What is Microbiology? 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.
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Scale of Microbes
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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
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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.
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Rob-Shaped Bacteria
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Spherical Bacteria
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Spiral-Shaped Bacteria Spirochete: Borrelia burgdorferi
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Types: Cyanobacteria Description : blue-green algae Types : photosynthetic aquatic procaryotes, green lake scum, cell walls Nutrient Type : photoautotrophs Durable state : ? Diseases : none
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Types: Algae Description : photosynthetic aquatic eucaryotes, cell walls, both unicellular and multicellular types Types : brown, red, green, diatoms, dinoflagellates, euglenoids Nutrient Type : photoautotrophs Durable state : ? 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]
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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.
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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.
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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 )
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This note was uploaded on 06/03/2011 for the course MCB 205 taught by Professor Abedon during the Spring '11 term at Ohio State.

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black01 - Microbiology What is Microbiology? Microbiology...

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