|thispagemap = Host invasion by microorganisms (Concept Map) - WikiBlood
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|linkpage =Immunology
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|linktext =IMMUNOLOGY
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|pagetype =Blood
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===Introduction===
===Introduction===
One of the main causes of disease is infection by microorganisms, with four types so far identified:
One of the main causes of disease is infection by microorganisms, with four types so far identified:
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*Viruses
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*[[Viruses]]
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*Bacteria
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*[[Bacteria]]
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*Fungi
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*[[Fungi]]
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*Parasites- comprising protozoa and helminths
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*[[Parasites]]- comprising [[protozoa]] and [[helminths]]
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A fifth controversial type are Pirons, which are infectious proteins that are believed to be the cause of bovine spongiform encephalopathy (BSE) and the human variant Creutzfeldt–Jakob disease (vCJD).<br />
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<br />
All exist as either:
All exist as either:
*Primary pathogens ('''obligate'''): presence always corresponds with disease
*Primary pathogens ('''obligate'''): presence always corresponds with disease
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*'''Orofecal''':typically enteric infections
*'''Orofecal''':typically enteric infections
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===[[:Category:Viruses|Viruses]]===
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{{Learning
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|flashcards = [[Host Invasion by Microorganisms Flashcards|Host Invasion Flashcards]]
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===[[:Category:Bacteria|Bacteria]]===
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}}
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===[[:Category:Parasites|Parasites]]===
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===[[:Category:Fungi|Fungi]]===
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==[[Host invasion by microorganisms flashcards- Wikiblood|Host Invasion Flashcards]]==