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Numbers of Salmonella enteritidis in the contents of naturally contaminated hens' eggs

  • T. J. Humphrey (a1), A. Whitehead (a1), A. H. L. Gawler (a1), A. Henley (a1) and B. Rowe (a2)
  • DOI: http://dx.doi.org/10.1017/S0950268800067546
  • Published online: 19 October 2009
Abstract
SUMMARY

Over 5700 hens eggs from 15 flocks naturally infected with Salmonella enteritidis were examined individually for the presence of the organism in either egg contents or on shells. Thirty-two eggs (0·6%) were positive in the contents. In the majority, levels of contamination were low. Three eggs, however, were found to contain many thousands of cells. In eggs where it was possible to identify the site of contamination, the albumen was more frequently positive than the yolk. Storage at room temperature had no significant effect on the prevalence of salmonella-positive eggs but those held for more than 21 days were more likely (P < 0·01) to be heavily contaminated. In batches of eggs where both shells and contents were examined, 1·1% were positive on the former site and 0·9% in the latter.

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6.TJ Humphrey , M Greenwood , RJ Gilbert , B Rowe , PA Chapman . The survival of salmonellas in shell eggs cooked under simulated domestic conditions. Epidemiol Infect 1989; 103: 3345.

9.JM Cowden , D Lynch , CA Joseph Report of a national case control study of Salmonella enteritidis phage type 4 infection. Br Med J 1989; 299: 771–3.

11.SA Hopper , SL Mawer . Salmonella enteritidis in a commercial layer flock. Vet Rec 1988; 123: 351.

12.SA Lister . Salmonella enteritidis in broilers and broiler breeders. Vet Rec 1988; 123: 350.

15.RK Gast , CW Beard . Production of Salmonella enteritidis-contammated eggs by experimentally infected hens. Avian Dis 1990; 34: 438–46.

18.SS Rizk , JC Ayres , AA Craft . Effect of holding condition on the development of salmonellae in artificially inoculated hens' eggs. Poult Sci 1966; 45: 825–9.

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Epidemiology & Infection
  • ISSN: 0950-2688
  • EISSN: 1469-4409
  • URL: /core/journals/epidemiology-and-infection
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