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Intratracheal Infection of Chickens with Salmonella enteritidis and the Effect of Feed and Water Deprivation

Masayuki Nakamura, Noriyuki Nagamine, Toshio Takahashi, Mari Norimatsu, Shoko Suzuki and Shizuo Sato
Avian Diseases
Vol. 39, No. 4 (Oct. - Dec., 1995), pp. 853-858
DOI: 10.2307/1592423
Stable URL: http://www.jstor.org/stable/1592423
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.
Intratracheal Infection of Chickens with Salmonella enteritidis and the Effect of Feed and Water Deprivation
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Abstract

The tissue distribution of Salmonella enteritidis in intratracheally inoculated chickens and the effect of deprivation of food and water on tissue distributions of the bacteria have been investigated. Seven-week-old specific-pathogen-free chickens were inoculated intratracheally with 102, 105, or 108 cells and orally with 105 cells. The intratracheally inoculated organisms entered the blood stream immediately after inoculation and produced generalized infection. Infection by the intratracheal route resulted in colonization of S. enteritidis in the cecum that was similar to infection by the oral route. The tissue distribution of S. enteritidis was markedly affected when chickens were deprived of food and water for a short time, demonstrating an increased susceptibility of chickens to S. enteritidis infection. This suggests that stresses such as food and water deprivation are one of of the causes of the rapid dissemination of S. enteritidis among chickens in poultry houses. /// Se investigó la distribución de Salmonella enteritidis en los tejidos de pollos infectados por vía intratraqueal y el efecto de la suspensión del agua y alimento. Se inocularon pollos libres de patógenos de 7 semanas de edad por vía intratraqueal a dosis de 102, 105 y 108, y por la vía oral con dosis de 105 bacterias. Los organismos que se inocularon por vía intratraqueal entraron a la circulación sanguínea inmediatamente después de la inoculación y produjeron una infección generalizada. Esta vía de administración causó la colonización del microorganismo en los ciegos en forma similar a la administración por vía oral. La distribución de S. enteritidis en los tejidos fue marcadamente afectada por la suspensión del agua y alimento durante un corto período, mostrando un incremento de la susceptibilidad de los pollos frente a la infección. Estos resultados sugieren que el estrés causado por la suspensión de agua y alimento constituye una causa importante para la difusión de la S. enteritidis entre las aves en los galpones.

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