Difference between revisions of "Brachyspira hyodysenteriae"

Revision as of 22:40, 14 May 2010

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

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 * An anaerobic spirochaete.
 * Causes [[Intestines Fibrinous/Haemorrhagic Enteritis - Pathology#Swine Dysentery|swine dysentery]].
+**''B. hyodysenteriae'' causes [[Intestines Fibrinous/Haemorrhagic Enteritis - Pathology#Swine Dysentery|swine dysentery]]
+**Infection is acquired via contaminated faeces
+**Disease spreads slowly through the herd
+**Dogs, rats, mice and flies may act as transport hosts
+**''B. hyodysenteriae'' survives several weeks in moist faeces
+*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