Skip to main content

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)...

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.

Hide All
1.Paul, J, Batchelor, B. Salmonella enteritidis phage type 4 and hens' eggs. Lancet 1988; ii: 1421.
2.Mawer, SL, Spain, GE, Rowe, B. Salmonella enteritidis phage type 4 and hens' eggs. Lancet 1989; i: 280–1.
3.Humphrey, TJ, Cruickshank, JG, Rowe, B. Salmonella enteritidis phage type 4 and hens' eggs. Lancet 1989; i: 281.
4.Humphrey, TJ, Baskerville, A, Mawer, SL, Rowe, B, Hopper, S. Salmonella enteritidis phage type 4 from the contents of intact eggs: a study involving naturally infected hens. Epidemiol Infect 1989; 103: 415–23.
5.Anonymous. Salmonella in eggs. PHLS evidence to Agriculture Committee. PHLS Microbiol Digest 1989 6: 19.
6.Humphrey, TJ, Greenwood, M, Gilbert, RJ, Rowe, B, Chapman, PA. The survival of salmonellas in shell eggs cooked under simulated domestic conditions. Epidemiol Infect 1989; 103: 3345.
7.Board, RG, Clay, CE, Lock, JL. The behaviour of Salmonella enteritidis in egg contents and raw egg products. J Appl Bacteriol 1989; 67: vii.
8.Coyle, EF, Palmer, SR, Ribeiro, CD et al. Salmonella enteritidis phage type 4 infection: association with hens' eggs. Lancet 1988; ii: 1295–7.
9.Cowden, JM, Lynch, D, Joseph, CA et al. Report of a national case control study of Salmonella enteritidis phage type 4 infection. Br Med J 1989; 299: 771–3.
10.Chart, H, Rowe, B, Baskerville, A, Humphrey, TJ. Serological response of chickens to Salmonella enteritidis infection. Epidemiol Infect 1990; 104: 6371.
11.Hopper, SA, Mawer, SL. Salmonella enteritidis in a commercial layer flock. Vet Rec 1988; 123: 351.
12.Lister, SA. Salmonella enteritidis in broilers and broiler breeders. Vet Rec 1988; 123: 350.
13.Humphrey, TJ. Public health implications of the infection of egg-laying hens with Salmonella enteritidis phase type 4. Worlds Poult Sci J 1990; 46: 513.
14.Dadrast, H, Hesketh, R, Taylor, DJ. Egg yolk antibody detection in identification of salmonella infected poultry. Vet Rec 1990; 126: 219.
15.Gast, RK, Beard, CW. Production of Salmonella enteritidis-contammated eggs by experimentally infected hens. Avian Dis 1990; 34: 438–46.
16.Romanoff, AL, Romanoff, AJ. The avian egg. New York: Wiley & Sons 1949; 672–7.
17.Scott, WM. Food poisoningdue to eggs. Br Med J 1930; 11: 56–8.
18.Rizk, SS, Ayres, JC, Craft, AA. Effect of holding condition on the development of salmonellae in artificially inoculated hens' eggs. Poult Sci 1966; 45: 825–9.
19.Garibaldi, JA, Lineweaver, H, Ijichi, K. Number of salmonellas in commercially broken eggs before pasteurisation. Avian Dis 1969; 13: 10961101.
20.Anonymous. Department of Health raw shell eggs. EL/88/P/136. London 1988.
Recommend this journal

Email your librarian or administrator to recommend adding this journal to your organisation's collection.

Epidemiology & Infection
  • ISSN: 0950-2688
  • EISSN: 1469-4409
  • URL: /core/journals/epidemiology-and-infection
Please enter your name
Please enter a valid email address
Who would you like to send this to? *


Altmetric attention score

Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed