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2 October 2012 Surveillance of Salmonella Enteritidis in Layer Houses: A Retrospective Comparison of the Food and Drug Administration's Egg Safety Rule (2010–2011) and the California Egg Quality Assurance Program (2007–2011)
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Abstract

Between July 2007 and December 2011, 2660 environmental drag swab samples were collected in total from California layer flocks on behalf of the California Egg Quality Assurance Program (CEQAP), the egg safety rule (21 CFR Parts 16 and 118) of the Food and Drug Administration (FDA), or both. The samples were processed by the California Animal Health and Food Safety Lab, and positive or negative results for Salmonella enterica serovar Enteritidis (SE) were recorded. This study retrospectively compares the differences between the FDA and CEQAP programs with respect to their SE environmental sampling surveillance results. To accomplish this comparison, two different CEQAP (new and old) data sets representing different SE environmental surveillance approaches in the life of the flock were compared against each other and against the FDA's SE environmental testing plan. Significant differences were noted between the CEQAP and FDA programs with respect to the prevalence of SE in the farm environment. Analyses of the prevalence of SE at different stages in the flock's life cycle (chick papers, preproduction, midproduction, postmolt, and premarket) found the highest prevalence of SE in premarket (11.9%), followed by postmolt (3.5%) and midproduction (3.4%), and there was a tie between chick papers and preproduction (2.1%). To assess the main effects of the presence of SE in the farm environment, backwards binary logistic regression was used. Of six independent variables examined (age of flock, year, season, owner, CEQAP membership, and analysis of pooled samples vs.. individual swabs), only age of flock, owner, and year were determined to be significant factors in the final model. Although CEQAP membership and pooling vs. individuals swabs were not included in the final model, Pearson chi-square tests did show significantly higher odds of SE for non-CEQAP member farms and higher odds of SE in pooled samples vs.. individual swabs.

Vigilancia de Salmonella Enteritidis en casetas de aves de postura: Comparación retrospectiva de la reglamentación de la Administración de Alimentos y Medicamentos en la seguridad del huevo (2010–2011) y del Programa de Aseguramiento de la Calidad del Huevo en California (2007–2011).

Entre julio del 2007 y diciembre del 2011, se recolectaron 2660 muestras de hisopos de arrastre ambientales de parvadas completas de gallinas ponedoras de California bajo el Programa de Aseguramiento de la Calidad del Huevo en California (con las siglas en inglés CEQAP), bajo las reglamentaciones en seguridad del huevo (Código de Regulaciones Federales número 21, partes 16 y 118) de la Administración de Alimentos y Medicamentos (con las siglas en inglés FDA), o bajo ambos. Las muestras fueron procesadas en el Laboratorio de Salud Animal y Seguridad Alimentaria de California y se registraron los resultados positivos o negativos para Salmonella enterica serovar Enteritidis (SE). Este estudio retrospectivo comparó las diferencias entre los programas de la FDA y del CEQAP con respecto a sus resultados de muestreos ambientales de vigilancia. Para llevar a cabo esta comparación, dos conjuntos diferentes de datos del CEQAP (nuevos y antiguos) que representaban diferentes enfoques de muestreos de vigilancia ambiental para Salmonella enterica serovar Enteritidis durante toda la vida de la parvada se compararon entre sí y con el plan de muestreo ambiental para S. enterica serovar Enteritidis de la FDA. Se observaron diferencias significativas entre los programas de la CEQAP y de la FDA con respecto a la prevalencia de esta bacteria en el ambiente de la granja. Mediante los análisis de la prevalencia para S. enterica serovar Enteritidis en las diferentes

American Association of Avian Pathologists
Maurice Pitesky, Bruce Charlton, Mark Bland, and Dan Rolfe "Surveillance of Salmonella Enteritidis in Layer Houses: A Retrospective Comparison of the Food and Drug Administration's Egg Safety Rule (2010–2011) and the California Egg Quality Assurance Program (2007–2011)," Avian Diseases 57(1), 51-56, (2 October 2012). https://doi.org/10.1637/10281-061312-Reg.1
Received: 15 June 2012; Accepted: 1 October 2012; Published: 2 October 2012
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