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Host invasion by microorganisms (view source)
Revision as of 09:28, 24 May 2012
, 09:28, 24 May 2012→Introduction
===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:
*Viruses
*[[Viruses]]
*Bacteria
*[[Bacteria]]
*Fungi
*[[Fungi]]
*Parasites- comprising protozoa and helminths
*[[Parasites]]- comprising [[protozoa]] and [[helminths]]
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 />
<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
*'''Orofecal''':typically enteric infections
*'''Orofecal''':typically enteric infections
{{Learning
|flashcards = [[Host Invasion by Microorganisms Flashcards|Host Invasion Flashcards]]
}}
===References===
===References===
*http://www.cellsalive.com
*http://www.cellsalive.com
{{review}}
<br><br>
[[Rebecca Pocock]]
{{Jim Bee 2007}}
[[Category:Immunology]]