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21 Cards in this Set
- Front
- Back
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Prions
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Protein/Proteinaceous Infectious Particles
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Prions
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Self-replicating, devoid of nucleic acid.
100x smaller than the smallest virus. |
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Prions
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Cause "slow infections" (months - decades - years) before symptoms.
Amyloid plaque found in CNS. |
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Scrapie
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Prion
Fatal brain disease in sheep. Dementia - spasms - coma - death |
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Creutzfeldt-Jakob Disease
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Prion
Worldwide Humans aged 50 to 70 years old. |
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Kuru
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Prion
Fore tribe in New Guinea Trembling - shivering - coma death |
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Viroids
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"Virus like"
Linear and Circular RNA. 10x smaller than smallest plant virus (Lack a protein coat) Cause a number of plant diseases. Infect: Chrysanthemums, potatoes, cucumbers, citrus trees, coconuts. |
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Viruses
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RNA or DNA (Single or double stranded)
infect many life forms. |
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Rickettsias and Chlamydias
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Unicellular
Prokaryotic Lack a true nucleus or membrane bound organelles. Obligate intracellular parasites. Reproduce only within a host cell. |
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Rickettsias and Chlamydias
Bacteria and Archea |
Lack a true nucleus or membrane bound organelles. (4)
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Rickettsias and Chlamydias
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Obligate intracellular parasites.
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Rickettsias and Chlamydias
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Reproduce only within a host cell
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Bacteria and Archaea
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Unicellular
Prokarotic Range from Antartic Ice to Steaming geysers No membrane-bound nucleus Most are saprophytic Live on dead and decaying organic matter |
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Bacteria and Archaea
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Range from Antartic Ice to Steaming geysers
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Bacteria and Archaea
Fungi |
Live on dead and decaying organic matter
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Algae
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Unicellular photosynthetic organisms
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Fungi
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Yeast, Molds, and mushrooms
Nonphotosynthetic Most are saprophytic |
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Protozoa
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Unicellular Animals
Eukaryotic Most are free-living Some are symbiotic (Living in close relationship with another organism) Some are parasites. |
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Helminths
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Roundworms and flatworms
Free-living and parasitic |
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Diphyllobothrium latum
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Eg. of Helminths
Fish tapeworm Can be up to 30 feet in length. |
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Microbiology
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The study of organisms too small to be seen clearly with the unaided human eye.
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