Effect of a Commercial Competitive Exclusion Product on the Colonization of Salmonella infantis in Day-Old Pheasant Chicks
One-day-of-age pheasant chicks were treated orally with the competitive exclusion product Broilact registered in three replicate trials. The following day the treated chicks and untreated control chicks were challenged likewise with approximately 103 colony-forming units (cfu) of Salmonella infantis...
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Veröffentlicht in: | Avian diseases 2003-10, Vol.47 (4), p.1448-1451 |
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Sprache: | eng |
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Zusammenfassung: | One-day-of-age pheasant chicks were treated orally with the competitive exclusion product Broilact registered in three replicate trials. The following day the treated chicks and untreated control chicks were challenged likewise with approximately 103 colony-forming units (cfu) of Salmonella infantis. Five days after challenge the cecal contents of the birds were examined quantitatively and by enrichment for S. infantis. In all three trials Broilact registered effectively reduced colonization of the challenge organism, the mean infection factor (IF) value (the logarithmic number of colony forming units of salmonella organisms per gram of cecal contents) for the treated groups being 2.9 and that for the salmonella control groups 8.4. Mortality during the 1 week rearing period was 5.0% in the Broilact registered treated groups and 8.5% in the salmonella control groups.Original Abstract: RESUMEN. Nota de Investigacion -Efecto de un producto comercial de exclusion competitive sobre la colonizacion de Salmonella infantis en faisanes de un dia de edad. Theta aisanes de un dia de edad se trataron oralmente con el producto de exclusion competitiva Broilact registered en tres experimentos repetidos. Al dia siguiente los pollitos tratados y los controles no tratados fueron desafiados con aproximadamente 103 unidades formadoras de colonia (UFC) de Salmonella infantis. Cinco dias despues del desafio los contenidos cecales de las aves fueron examinados cuantitativamente y mediante el enriquecimiento de S. infantis. En todos los tres experimentos el Broilact registered redujo efectivamente la colonizacion del organismo de desafio. El valor promedio del factor infeccioso (el logaritmo del numero de UFC de Salmonella por gramo de contenido cecal) fue de 2.9 para los grupos tratados y de 8.4 para los grupos controles. La mortalidad durante la semana del periodo de crianza fue del 5.0% en el grupo tratado con Broilact registered y de 8.5% en los grupos controles. double prime bbreviations: BHI = brain-heart infusion; CE = competitive exclusion; cfu = colony-forming units; IF = infection factor |
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ISSN: | 0005-2086 |
DOI: | 10.1043/0005-2086(2003)047(1448:EOACCE)2.0.CO;2 |