Reference : Bacterial Intestinal Flora Associated with Enterotoxaemia in Belgian Blue Calves
Scientific journals : Article
Life sciences : Microbiology
Life sciences : Veterinary medicine & animal health
http://hdl.handle.net/2268/544
Bacterial Intestinal Flora Associated with Enterotoxaemia in Belgian Blue Calves
English
Manteca, Christophe [Université de Liège - ULg - ULG > Maladies infectieuses et parasitaires > Bactériologie et Pathologies des maladies bactériennes > >]
Daube, Georges mailto [Université de Liège - ULg > Département de sciences des denrées alimentaires > Microbiologie des denrées alimentaires >]
Pirson, Vincianne [Université de Liège - ULg - ULG > Maladies infectieuses et parasitaires > Bactériologie et Pathologie des Maladies bactériennes > >]
Limbourg, Bernard [Fédération de Lutte contre les Maladies du bétail de Ciney > > > > > >]
Kaeckenbeeck, Albert [Université de Liège - ULg > > Relations académiques et scientifiques (Méd. vétérinaire) >]
Mainil, Jacques mailto [Université de Liège - ULg > Département des maladies infectieuses et parasitaires > Bactériologie et pathologie des maladies bactériennes > >]
2001
Veterinary Microbiology
81
1
1-12
Yes (verified by ORBi)
International
0378-1135
[en] Enterotoxaemia ; Calves ; Clostridium perfringens ; E. coli ; Salmonella
[en] The enterotoxaemia syndrome in Belgian Blue calves is characterised by a high case fatality rate, sudden death, lesions of haemorrhagic enteritis of the small intestine and, quite often an absence of other clinical signs but its cause has not been yet identified. As a first step in this identification, the aerobic and anaerobic intestinal flora of a population of 78 calves, originating from farms located in southern Belgium and that died in circumstances defined as "calf enterotoxaemia" (study population) and of 64 calves that died in other circumstances (control population) were studied qualitatively and quantitatively. The colonies were identified after subcultures with appropriate API sugar sets. Anaerobically Clostridium perfringens was isolated in higher numbers (mean values of 10(7)-10(7.5) colony forming units (CFU) versus 10(4)-10(5) CFU per ml of intestinal content) and from more animals (79 versus 19%) in the study population than in the control population, although individual results from both populations could overlap. Other clostridial species, i.e. mainly urease-negative C. sordellii and C. bifermentans, were isolated in high numbers (>10(6) CFU per ml of intestinal content) from a few animals in the study population only. All but one of the 705 C. perfringens isolates from both populations belonged to the A toxin type and none of the urease-negative C. sordellii was toxigenic. Gram-negative anaerobes were not isolated in high numbers from any of the samples. Aerobically beta-haemolytic E. coli were significantly more frequent among the study population, but were isolated from only 25% of the animals. Salmonella Typhimurium was isolated from only two animals in the study population. Less than 1% of the E. coli isolated were verotoxigenic and one-third were necrotoxigenic. At this stage only non-enterotoxigenic type A C. perfringens are thus statistically associated with the enterotoxaemia syndrome in Belgian Blue calves and fulfil the first of the Koch's postulates.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/544

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