Difference between revisions of "Oedema Disease"
Jump to navigation
Jump to search
(Created page with '* '''Catarrhal gastritis is an important characterisitic of this condition''' * Oedema disease is a sporadic condition that can become important on some …') |
|||
| (7 intermediate revisions by the same user not shown) | |||
| Line 1: | Line 1: | ||
| − | + | * '''[[Gastritis, Catarrhal|Catarrhal gastritis]] is an important characterisitic of this condition''' | |
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
* Oedema disease is a sporadic condition that can become important on some farms. | * Oedema disease is a sporadic condition that can become important on some farms. | ||
| Line 12: | Line 7: | ||
** 7-10 days after major change in diet e.g. weaning. | ** 7-10 days after major change in diet e.g. weaning. | ||
* Signs include | * Signs include | ||
| − | ** '''No''' [[Diarrhoea|diarrhoea]] | + | ** '''No''' [[Intestine Diarrhoea - Pathology|diarrhoea]] |
** Puffy eyelids | ** Puffy eyelids | ||
** High-pitched voice (oedema of larynx) | ** High-pitched voice (oedema of larynx) | ||
| Line 23: | Line 18: | ||
* Oedema disease is an enterotoxaemia associated with infection by enterotoxigenic [[Escherichia coli|''E.coli'']]. | * Oedema disease is an enterotoxaemia associated with infection by enterotoxigenic [[Escherichia coli|''E.coli'']]. | ||
| − | * Verotoxin/ shiga toxin- producing ''E. coli'' proliferate in the [[Small Intestine | + | * Verotoxin/ shiga toxin- producing ''E. coli'' proliferate in the [[Small Intestine - Anatomy & Physiology|small intestine]] |
** Especially O138, O139, and O141. | ** Especially O138, O139, and O141. | ||
** Organisms remain in the gut (are not invasive). | ** Organisms remain in the gut (are not invasive). | ||
| Line 33: | Line 28: | ||
====Pathology==== | ====Pathology==== | ||
| − | * An important characteristic of oedema disease is the occurrence of catarrhal gastritis and marked oedema in the [[ | + | * An important characteristic of oedema disease is the occurrence of catarrhal gastritis and marked oedema in the [[Forestomach - Anatomy & Physiology|stomach]] mucosa and wall. |
* Also oedema of various organs, particularly between coils of spiral [[Colon - Anatomy & Physiology|colon]]. | * Also oedema of various organs, particularly between coils of spiral [[Colon - Anatomy & Physiology|colon]]. | ||
| Line 40: | Line 35: | ||
* Clinical signs are characteristic. | * Clinical signs are characteristic. | ||
* Also by culture and typing of ''E. coli'' from gut | * Also by culture and typing of ''E. coli'' from gut | ||
| − | + | [[Category:Stomach_and_Abomasum_-_Inflammatory_Pathology]][[Category:Pig]] | |
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | [[Category:Stomach_and_Abomasum_-_Inflammatory_Pathology]][[Category: | ||
| − | |||
Revision as of 12:53, 29 May 2010
- Catarrhal gastritis is an important characterisitic of this condition
- Oedema disease is a sporadic condition that can become important on some farms.
Clinical
- Generally occurs in young pigs, though sometimes in older pigs
- 7-10 days after major change in diet e.g. weaning.
- Signs include
- No diarrhoea
- Puffy eyelids
- High-pitched voice (oedema of larynx)
- Sitting on haunched
- "Star-gazing" due to cerebral oedema (hallucinations?).
- Animals usually die.
- Disease develops very quickly so pigs do not have time to go off food.
Pathogenesis
- Oedema disease is an enterotoxaemia associated with infection by enterotoxigenic E.coli.
- Verotoxin/ shiga toxin- producing E. coli proliferate in the small intestine
- Especially O138, O139, and O141.
- Organisms remain in the gut (are not invasive).
- Labile shiga-like toxin II is absorbed into body, producing effects everywhere.
- Blood vessel walls are damaged and become very leaky, producing oedema everywhere.
- Histological blood vessel changes are subtle.
- Fibrinoid degeneration of media in small arteries.
Pathology
- An important characteristic of oedema disease is the occurrence of catarrhal gastritis and marked oedema in the stomach mucosa and wall.
- Also oedema of various organs, particularly between coils of spiral colon.
Diagnosis
- Clinical signs are characteristic.
- Also by culture and typing of E. coli from gut