Difference between revisions of "Host invasion by microorganisms"
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| − | === | + | {{toplink |
| + | |backcolour = FFE4E1 | ||
| + | |linkpage =WikiBlood | ||
| + | |linktext =WIKIBLOOD | ||
| + | |maplink = Haematopoiesis and Blood Cells (Concept Map) - WikiBlood | ||
| + | |tablelink = Haematopoiesis and Blood Cells (Table) - WikiBlood | ||
| + | |sublink1 =Immunology - WikiBlood | ||
| + | |subtext1 =IMMUNOLOGY | ||
| + | |pagetype =Blood | ||
| + | }} | ||
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| + | =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 |
| − | * | + | *Bacteria |
| − | * | + | *Fungi |
| − | * | + | *Parasites- comprising protozoa and helminths |
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| − | |||
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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| − | = | + | =[[Viruses - WikiBlood|Viruses]]= |
| − | |||
| − | + | =[[Bacteria - WikiBlood|Bacteria]]= | |
| + | =[[Parasites - WikiBlood|Parasites]]= | ||
| − | + | =[[Fungi - Wikiblood|Fungi]]= | |
| − | < | + | =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> |
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Revision as of 12:41, 3 September 2008
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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.