Difference between revisions of "Host invasion by microorganisms"

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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:
*[[Viruses]]
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*Viruses
*[[Bacteria]]
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*Bacteria
*[[Fungi]]
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*Fungi
*[[Parasites]]- comprising [[protozoa]] and [[helminths]]
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*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
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*'''Orofecal''':typically enteric infections
 
*'''Orofecal''':typically enteric infections
  
{{Learning
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===[[Viruses - WikiBlood|Viruses]]===
|flashcards = [[Host Invasion by Microorganisms Flashcards|Host Invasion Flashcards]]
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}}
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===[[Bacteria - WikiBlood|Bacteria]]===
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===[[Parasites - WikiBlood|Parasites]]===
  
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===[[Fungi - Wikiblood|Fungi]]===
 
===References===
 
===References===
 
*<div id="Janeway">{{citation|initiallast = Murphy|initialfirst = K|2last = Travers|2first = P|finallast = Walport|finalfirst = M|year = 2008|title = Janeway's Immunobiology|ed = 7th |city = New York|pub = Garland Science Publishing}}</div>
 
*<div id="Janeway">{{citation|initiallast = Murphy|initialfirst = K|2last = Travers|2first = P|finallast = Walport|finalfirst = M|year = 2008|title = Janeway's Immunobiology|ed = 7th |city = New York|pub = Garland Science Publishing}}</div>
 
*http://www.cellsalive.com
 
 
 
{{review}}
 
<br><br>
 
{{Jim Bee 2007}}
 
[[Category:Immunology]]
 

Revision as of 16:58, 5 September 2008

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IMMUNOLOGY


Introduction

One of the main causes of disease is infection by microorganisms, with four types so far identified:

  • Viruses
  • Bacteria
  • Fungi
  • Parasites- comprising protozoa and helminths

All exist as either:

  • Primary pathogens (obligate): presence always corresponds with disease
  • Secondary (opportunistic): prerequisites must be fulfilled before disease occurs

Microorganisms can enter the body by three routes:

  • Contact: typically seen in dermatological infections
  • Aerosol: typically respiratory infections
  • Orofecal:typically enteric infections

Viruses

Bacteria

Parasites

Fungi

References

  • Murphy, K., Travers, P. and Walport, M. (2008) Janeway's Immunobiology. 7th ed. New York: Garland Science Publishing.