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9 Cards in this Set
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Subviral partical
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infectious agents smaller than viruses
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Viroid
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short single circular strands of RNA (250-400 nucleotides long) with no proteins or protective coat
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Where are viroids found
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in the host cell nucleus
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How do viroids reproduce?
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viroids are copied by a host DNA dependent RNA polymerase
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Prion
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a protein (208 amino acids) pathogen that infects without any nucleic acid (smaller than viroid)
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Prions are associated with ____ deseases in ____ and ____
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degenerative brain diseases in birds and mammals
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Prions are difficult to eradicate from the body because
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once in the host cell, a prion awill alter in shape and become insoluble leading to an accumulation as plaque (in the brain)
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Transmissible Spongiform Encephalopathies (TSE)
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prion class of diseases with usually fatal oucomes
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name several TSEs [2]
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BSE - bovine spongiform encephalopathy (mad cow)
CJD - Creutzfeldt-Jacob Disease in humans Scrapie - sheep loose coordination, irritable itch |
