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The identification of Salmonella enteritidis-infected poultry flocks associated with an outbreak of human salmonellosis

Published online by Cambridge University Press:  15 May 2009

A. W. van de Giessen
Affiliation:
Laboratory for Water and Food Microbiology
J. B. Dufrenne
Affiliation:
Laboratory for Water and Food Microbiology
W. S. Ritmeester
Affiliation:
Laboratory for Water and Food Microbiology
P. A. T. A. Berkers
Affiliation:
Laboratory for Water and Food Microbiology
W. J. van Leeuwen
Affiliation:
Laboratory for Bacteriology, National Institute of Public Health and Environmental Protection, 3720 BA Bilthoven, The Netherlands
S. H. W. Notermans
Affiliation:
Laboratory for Water and Food Microbiology
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Summary

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In the summer of 1991 a human outbreak of Salmonella enteritidis infection occurred following a barbecue in which about 100 persons were involved. Eggs, supplied by one or more of 10 different layer farms, were the most probable source of the infection. To identify the S. enteritidis-positive flocks, an immunoassay was used to detect salmonella serogroup D-specific antibodies in the yolk of hens eggs. Antibody titres in the eggs from two layer farms, farm A and B, clearly exceeded the titres found in randomly collected eggs. Further investigations on farm A and B yielded high antibody titres in the eggs from flocks A1, A2 and B2, and low titres in the eggs from flock B1. S. enteritidis was isolated from the faecal samples of flocks A1, A2 and B2, whereas no salmonella was detected in the faecal samples of flock B1. The flocks present on both farms originated from the same breeder flock.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1992

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