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LSI e-Catalogue 2012 Veterinary Diagnostic Kits Elisa, PCR and BVD (English) |
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e-Catalogue LSI 2012 des kits de diagnostic vétérinaire Elisa, PCR et BVD (FR) |
Brachyspira hyodysenteria, a motile, spiral-shaped bacterium, is the causative agent of porcine dysentery (also called haemorrhagic diarrhoea or haemorrhagic enteritis). It infects pigs but can also cause transient, asymptomatic infection of other animal species such as rats, mice, dogs and birds if they come into contact with pig faeces. The disease is found in all countries in which pig breeding is developed. It mainly strikes pigs in the fattening stage although sows and weaned piglets can also present symptoms. The most common route of contamination is the introduction of an infected animal into a unit but mice may also play an important role because they can contract the infection from a small inoculum (102 CFU) and then continue excreting the bacterium for six months. The main symptoms of the disease are diarrhoea, weight loss, delayed growth and, in the most severe forms, dehydration. Porcine dysentery has serious economic repercussions because of its mortality (up to 50% in a given unit) and, to an even greater extent, delayed growth (slaughter can be delayed by 28 days) and the cost of treatment. In addition, cured animals constitute a danger since they may still be excreting the bacterium.