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139 bytes added ,  20:12, 19 August 2007
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*** Tissues selected from the dead body after necropsy.
 
*** Tissues selected from the dead body after necropsy.
 
*** Biopsy/excision materials from lesions in the living animal.
 
*** Biopsy/excision materials from lesions in the living animal.
5. Histochemistry - microscopic visualisation of enzymatic activity in tissues.
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* '''Histochemistry'''
6. Immunological methods - detection of specific antibody activity in tissues and fluids.
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** Microscopic visualisation of enzymatic activity in tissues.
When linked to a marking agent i.e. a fluorescent dye or other
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* '''Immunological methods'''
substance, it can localise in the tissue the antigen for that
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** Specific antibody activity can be detected in tissues and fluids.
particular antibody.
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*** Examination of serum can show prior exposure to a particular infectious agent (i.e. specifice antibodies).
Examination of serum can show prior exposure to a particular
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** Specific antigens can be detected in tissues.
infectious agent.
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*** When linked to a marking agent (e.g. a fluorescent dye), an antibody can localise its antigen in the tissue.
7. Electronmicroscopy - fine detail of the surfaces or internal structures of cells.
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* '''Electronmicroscopy'''
8. Bacteriology /Virology/Parasitology - isolation and identification of pathogenic
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** Electronmicrosopcy shows fine detail of the surfaces or internal structures of cells.
bacteria/viruses/parasites.
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* '''Bacteriology/ Virology/ Parasitology'''
9. Toxicology - analysis of tissues for particular poisons and toxins.
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** These techniques allow the isolation and identification of pathogenic bacteria, viruses and parasites.
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* '''Toxicology'''
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** Analysis of tissues for particular poisons and toxins.
    
==Degenerations and Infiltrations==
 
==Degenerations and Infiltrations==
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