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MOLB Chapter 1
The Microbial World and You
Term | Definition |
---|---|
Archea | Prokaryotic, single celled, extremophils, no peptidoglycan, no known pathogens |
Bacteria | Prokaryotic, single celled, shaped-cocci, bacilli, spiral, cell wall contains peptidoglycan, reproduce by binary fission, have flagella |
Fungi | Eukaryotic, single or multicellular, cell wall contains chitin, not photosynthetic |
Protozoa | Eukaryotic, single celled, freeliving/parasitic, moves with flagella/pseudopods/cilia |
Algae | Eukaryotic, single/multicellular, photosynthetic, cell wall contains cellulose |
Viruses | living/nonliving, only contains protein/nucleic acid (DNA or RNA) |
Multicellular Animal Parasites | Eukaryotic, parts of lifecycle are microscopic |
Cell Theory | 1. All things are made up of cells 2. All cells come from preexisting cells |
Spontaneous Generation | living things arise from non living matter by a vital force |
Redi 1668 | 2 jars of meat one covered, one uncovered uncovered contained maggots and flies covered did not contain maggots or flies disregarded because of the lack of air containing vital force repeated with mesh cover instead leading to the same results |
Needham 1745 | heated nutrient broth, once cooled contained microorganisms |
Spallanzani 1765 | nutrient broth heated after it was covered did not develop microbial growth |
Pasteur 1861 | developed swan-necked flasks to allow air to enter but kept microorganisms from entering the broth |
Biogenesis | living cells only arise only from preexisting living cells |
Koch's Postulates | A sequence of experimental steps for directly relating a specific microbe to a specific disease 1. Isolate microbe from a sick individual 2. Identify microbe 3. Inoculate healthy individual with microbe 4. Re-isolate/re-identify the microbe |
Jenner 1796 | Discovered vaccination by inoculating someone with the cowpox virus making them immune to smallpox |
Vaccination | introduction of a microorganism that has lost the ability to cause disease to induce immunity against subsequent infections |