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Frequency of Isolation of Salmonella from Protective Foot Covers Worn in Broiler Houses as Compared to Drag-Swab Sampling

D. J. Caldwell, B. M. Hargis, D. E. Corrier and J. R. DeLoach
Avian Diseases
Vol. 42, No. 2 (Apr. - Jun., 1998), pp. 381-384
DOI: 10.2307/1592489
Stable URL: http://www.jstor.org/stable/1592489
Page Count: 4
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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.
Frequency of Isolation of Salmonella from Protective Foot Covers Worn in Broiler Houses as Compared to Drag-Swab Sampling
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Abstract

In this study we tested the hypothesis that the frequency of Salmonella isolation from protective foot covers worn in individual broiler production houses would compare favorably to isolation rates obtained from conventional drag-swab methods. Salmonella was detected with equal frequency from protective foot covers and drag-swab assemblies on nine individual broiler farms over three separate sampling periods. Salmonella was detected in 13 of a total 27 individual samplings by culturing the protective foot covers, whereas positive detections occurred in 16 of a total 27 samplings when using the drag-swab method. Of the total number of houses identified as positive, these frequencies were unaltered when evaluated against the flock status of each farm at the time of sampling. Both methods were equally as likely to detect Salmonella when houses were either vacant (awaiting the placement of the next flock) or occupied (currently housing chickens of any age). In addition to highlighting the development of a potential new Salmonella monitoring technique, this study reinforces our current understanding regarding the importance of stringent biosecurity practices on poultry farms. /// En este estudio se examinó la hipótesis de que la frecuencia de aislamientos de Salmonella a partir de las cubiertas para calzado usadas en granjas de pollo de engorde podría compararse favorablemente con los porcentajes de aislamiento obtenidos usando el método de hisopos de barrido. Se detectó Salmonella con igual frecuencia en las cubiertas para calzado y en los hisopos de barrido en nueve granjas de pollos de engorde muestreadas durante tres veces. Se detectó Salmonella en 13 de un total de 27 muestreos cuando se utilizaron las cubiertas para calzado, mientras que el número de muestras positivas usando el método de hisopos de barrido fue de 16. Del número total de galpones identificados como positivos, estas frecuencias no se alteraron cuando se evaluaron frente al estado de cada lote de la granja en el momento del muestreo. Ambos métodos fueron iguales para detectar Salmonella cuando los galpones estaban vacíos (esperando el siguiente lote) u ocupados. Además de demonstrar el desarrollo de una nueva técnica para detectar Salmonella, este estudio refuerza los conocimientos actuales relacionados con la importancia de mantener estrictas prácticas de bioseguridad en las granjas de aves.

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