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Consecutive salmonella outbreaks traced to the same bakery

Published online by Cambridge University Press:  15 May 2009

M. R. Evans ,
J. P. Tromans ,
E. L. S. Dexter ,
C. D. Ribeiro  and
D. Gardner
M. R. Evans
Affiliation:
Department of Public Health Medicine, South Glamorgan Health Authority, Abton House, Wedal Road, Cardiff CF4 3QX
J. P. Tromans
Affiliation:
PHLS Communicable Disease Surveillance Centre (Welsh Unit), Abton House, Wedal Road, Cardiff CF4 3QX
E. L. S. Dexter
Affiliation:
PHLS Communicable Disease Surveillance Centre (Welsh Unit), Abton House, Wedal Road, Cardiff CF4 3QX
C. D. Ribeiro
Affiliation:
Cardiff Public Health Laboratory, University Hospital of Wales, Heath Park, Cardiff CF4 4XW
D. Gardner
Affiliation:
Cardiff Environmental Services, Wood Street, Cardiff CFI INQ
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Summary

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Two consecutive community outbreaks of Salmonella enteritidis phage type 4 (PT4) traced to the same bakery occurred in Cardiff, Wales during August–September 1992. In the first outbreak, illness was associated with eating custard slices (odds ratio 23·8, 95% confidence interval 6·5–94·4, P < 0·0001), and in the second, with eating fresh cream cakes (odds ratio 15·8, 95% confidence interval 1·6–374, P = 0·004). Environmental investigations implicated cross-contamination during preparation of the cold-custard mix as the cause of the first outbreak, and inadequate cleaning and disinfection of nozzles used for piping cream in the second outbreak. S. enteritidis PT4 was isolated from fresh cream sponge cake retained by a case and from two fresh cream cakes and four environmental swabs obtained at the bakery. This incident illustrates the hazard of widespread environmental contamination with salmonella and the need for thorough environmental cleansing of any premises implicated in an outbreak of food poisoning.

Type
Research Article
Information
Epidemiology & Infection , Volume 116 , Issue 2 , April 1996 , pp. 161 - 167
Copyright
Copyright © Cambridge University Press 1996

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