Difference between revisions of "Host invasion by microorganisms"
Jump to navigation
Jump to search
| Line 3: | Line 3: | ||
|linkpage =WikiBlood | |linkpage =WikiBlood | ||
|linktext =WIKIBLOOD | |linktext =WIKIBLOOD | ||
| − | |maplink = | + | |maplink = Host invasion by microorganisms (Concept Map) - WikiBlood |
| − | |||
|sublink1 =Immunology - WikiBlood | |sublink1 =Immunology - WikiBlood | ||
|subtext1 =IMMUNOLOGY | |subtext1 =IMMUNOLOGY | ||
Revision as of 19:20, 3 September 2008
|
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.