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United States Department of Agriculture

Agricultural Research Service

Research Project: CONTROLLING EGG CONTAMINATION WITH SALMONELLA ENTERICA BY UNDERSTANDING ITS EVOLUTION AND PATHOBIOLOGY

Location: Egg Safety and Quality

Title: The Relationship between the Numbers of Salmonella Enteritidis, S. Heidelberg, or S. Hadar Colonizing Reproductive Tissues of Experimentally Infected Laying Hens and Deposition inside Eggs

Authors
item Gast, Richard
item Guraya, Rupinder
item Guard, Jean
item Holt, Peter

Submitted to: American Association of Avian Pathologists
Publication Type: Abstract Only
Publication Acceptance Date: March 1, 2010
Publication Date: July 15, 2010
Citation: Gast, R.K., Guraya, R., Guard, J.Y., Holt, P.S. 2010. The Relationship between the Numbers of Salmonella Enteritidis, S. Heidelberg, or S. Hadar Colonizing Reproductive Tissues of Experimentally Infected Laying Hens and Deposition inside Eggs. American Association of Avian Pathologists. Paper No. 9203.

Technical Abstract: Salmonella deposition inside eggs results from reproductive tract colonization in laying hens. In the present study, groups of hens were orally infected with S. Enteritidis, S. Heidelberg, or S. Hadar. No significant differences were observed between strains in either the frequency or numbers of Salmonella in ovaries or oviducts at 5 days postinoculation. However, significantly more internally contaminated eggs were laid by hens infected with S. Enteritidis (3.6%) than with either S. Heidelberg (0.5%) or S. Hadar (0%) through 25 days postinoculation. Egg contamination differences were apparently not due to differences in the numbers of Salmonella colonizing reproductive organs.

Last Modified: 4/16/2014