Difference between revisions of "Brachyspira hyodysenteriae"

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* An anaerobic spirochaete.
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* Causes [[Swine Dysentery|swine dysentery]].
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**Infection is acquired via contaminated faeces
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''Brachyspira hyodysenteriae'' is an anaerobic ''[[spirochaetes]]''. It is the cause of [[Swine Dysentery|swine dysentery]].
**Disease spreads slowly through the herd
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**Dogs, rats, mice and flies may act as transport hosts
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Infection of ''Brachyspira hyodysenteriae'' is acquired via contaminated faeces. Dogs, rats, mice and flies may act as transport hosts.
**''B. hyodysenteriae'' survives several weeks in moist faeces
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''B. hyodysenteriae'' survives several weeks in moist faeces. Carrier pigs shed ''B. hyodysenteriae'' for up to 3 months, acting as a source of infection for healthy pigs.
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*Clinical signs
 
**''B. hyodysenteriae'' causes dysentry in weaned pigs 6-12 weeks old; pigs lose condition and become emaciated; appetite is decreased; large amount of mucous may be present in the faeces; low mortality; poor feed conversion ratio
 
*Diagnosis
 
**History, clinical signs and gross pathology
 
**Anaerobic culture on blood agar with added antibiotics for at least 3 days
 
**''B. hyodysenteriae'' causes complete haemolysis whereas other spirochaetes cause partial haemolysis
 
**Immunofluorescence, DNA probes and biochemical tests
 
**Serology using ELISA can be used on a herd basis
 
**PCR
 
 
[[Category:Brachyspira and Serpulina]][[Category:Pig]]
 
[[Category:Brachyspira and Serpulina]][[Category:Pig]]
[[Category:To_Do_-_Bacteria]]
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[[Category:To_Do_-_AimeeHicks]]

Revision as of 10:34, 20 July 2010



Brachyspira hyodysenteriae is an anaerobic spirochaetes. It is the cause of swine dysentery.

Infection of Brachyspira hyodysenteriae is acquired via contaminated faeces. Dogs, rats, mice and flies may act as transport hosts.

B. hyodysenteriae survives several weeks in moist faeces. Carrier pigs shed B. hyodysenteriae for up to 3 months, acting as a source of infection for healthy pigs.