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Effect of Eimeria tenella Infection on Resistance to Salmonella typhimurium Colonization in Broiler Chicks Inoculated with Anaerobic Cecal Flora and Fed Dietary Lactose

M. H. Kogut, T. Fukata, G. Tellez, B. M. Hargis, D. E. Corrier and J. R. DeLoach
Avian Diseases
Vol. 38, No. 1 (Jan. - Mar., 1994), pp. 59-64
DOI: 10.2307/1591837
Stable URL: http://www.jstor.org/stable/1591837
Page Count: 6
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Effect of Eimeria tenella Infection on Resistance to Salmonella typhimurium Colonization in Broiler Chicks Inoculated with Anaerobic Cecal Flora and Fed Dietary Lactose
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Abstract

This study evaluated the effect of Eimeria tenella infection on Salmonella typhimurium colonization of broiler chicks following oral inoculation with anaerobic cecal flora either alone or with a treatment of 10% dietary lactose. The number of chicks colonized by S. typhimurium was significantly lower (P < 0.05) in groups inoculated with cecal flora with or without the dietary lactose treatment than in control groups. In addition, significantly fewer S. typhimurium organisms were isolated from the cecal contents of chicks inoculated with anaerobic cecal flora and treated with 10% dietary lactose than in the control chicks. Infection with E. tenella had no effect on the resistance of treated groups to S. typhimurium colonization of the ceca but did cause higher S. typhimurium colonization in the untreated control chicks. The results indicated that: A) anaerobic cecal flora given orally on the day of hatch to chicks with or without dietary lactose enhanced the resistance of the birds to Salmonella cecal colonization; and B) coccidial infection had no detrimental effect on this resistance to Salmonella colonization. /// Se evaluó el efecto de la infección por Eimeria tenella sobre la colonización por Salmonella typhimurium en pollos de engorde después de la inoculación oral con flora cecal anaeróbica sóla o con la adición de 10% de lactosa en la dieta. El número de pollos colonizados por S. typhimurium fue significantemente más bajo (P < 0.05) en los grupos inoculados únicamente con flora cecal y en los grupos que recibieron flora cecal con lactosa en la dieta, que en los grupos controles. Además, se aislaron significantemente menores cantidades de S. typhymurium del contenido cecal de los pollos inoculados con flora cecal anaeróbica y 10% de lactosa dietética, que de los pollos controles. La infección por E. tenella no tuvo efecto sobre la resistencia a la colonización del ciego por S. typhimurium dada por ninguno de los dos tratamientos, pero sí causó una colonización más alta por S. typhimurium en los pollos controles no tratados. Los resultados indicaron que: A) la flora cecal anaeróbica suministrada oralmente a pollitos de un día de edad sóla o con lactosa dietética aumentó la resistencia de las aves a la colonización cecal por Salmonella y B) la infección por coccidia no tuvo efecto negativo sobre la resistencia a la colonización por Salmonella.

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