Line 33: |
Line 33: |
| *Exposure of flock will serve to immunise | | *Exposure of flock will serve to immunise |
| *No effective vaccines exist | | *No effective vaccines exist |
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| + | * Caused by a [[Coronaviridae|coronavirus]]. |
| + | * Known as Epidemic diarrhoea or TGE. |
| + | * Produces an explosive diarrhoeic disease, which spreads through the farm rapidly. |
| + | * Epidemiologically, the disease is easy to recognise, since all ages of pigs scour. |
| + | ** This is the means of diagnosis. |
| + | * Consequences of disease differ with the age of the animal. |
| + | ** In very young animals, mortality may be up to 100%. |
| + | ** In animals 1-3 weeks old, mortality is around 50%. |
| + | ** Over 3 weeks of aged, mortality is 25%. |
| + | ** Older pigs tend to recover from the disease. |
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| + | =====Pathology===== |
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| + | * Villi are shortened and more rounded, with a degree of fusion. |
| + | * Epithelial cells over the villi are flattened. |
| + | * The lamnia propria is congested and oedemetous. |
| + | * These changes are in contrast to coliform infections, which show much more normal villi. |
| + | ** Many gram-negative bacteria can be seen adhering to the villi wall if a gram stain is used. |
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| [[Category:Coronaviridae]][[Category:Pig]] | | [[Category:Coronaviridae]][[Category:Pig]] |