Human Pathogens – Flashcards
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Microbiology |
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| the brance of sciende that deals with micororganisms and their effect on other living organisms |
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| Organism |
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| an individual form of life like a plant, animal, bacterium, protist fungi |
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| Pathogens |
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| organisms ( or agents) that infect teh body causing disease. |
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| Pathogenicity |
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| the ability of a pathogen to cause disease |
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Virulence
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| the relative ability of a pathogen to cause disease. |
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| Opportunistic pathogens |
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| organisms ( often normal flora) that are not pathogenic under normal circumstances, but can cause disease under certain circumstances, such as a wound, being in the wrong place at the or changing in immune status. |
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| Postulates |
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| guidlines to conclude that a particular organism causes a specific disease |
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| Who established cause of Infectious disease through postulates ? |
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| Robert Kock = Koch's Postulates; |
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| Zoonosis; |
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| microorganisms that infect both animals and humans; |
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| What is the worldwide # 1 killer among infectious diseases?; |
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| HIV/AIDS; |
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| What is the number 2 killer world wide among infectious diseases? |
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| Tuberculosis; |
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| What 2 domains are pathogens in? |
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| Bacteria and Eucarya; |
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| Within Eukarya pathogens are found where? |
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| in fungi and protozoans; |
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| How do prokaryotes differ from eukaryotes?; |
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| prokaryotes have no internal membranes; |
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| Viruses; |
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very small obligate intracellular parasites, consisting of nucleic acid (DNA or RNA) and protein; ; so small can no be dected by light microscope.; ; must have host machinery to replicate. inactive outside of host.; - all forms of life can be infected by viruses; |
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| Viroids; |
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consist of a single short piece of RNA . contain no protective protein coat . ; smaller and simpler than virus DNA , still require host cell for replication.; ; many cause plant diseases; |
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| Prions; |
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infectious proteins, contain no nucleic acid.; ; responsible for at least seven neruodegenerative diseases.; |
