Epidemiology and Infection

Research Article

An investigation into an outbreak of Salmonella enteritidis phagetype 4 infection and the consumption of custard slices and trifles

G. H. Barnesa1 and A. T. Edwardsa1

a1 Calderdale Health Authority, Royal Halifax Infirmary, Free School Lane, Halifax, West Yorkshire HX1 2YP


Epidemiological investigation into an outbreak of food poisoning in 17 patients caused by Salmonella enteritidis phage-type 4 demonstrated a highly significant association with consumption of custard, retailed in custard slices and trifles from a bakery on one day. The bakery had changed their recipe for custard 2 weeks earlier to include fresh shell eggs and had not followed earlier national advice on cooking eggs for human consumption. The case-control study supports earlier work associating Salmonella enteritidis phage-type 4 infection with consumption of uncooked or lightly cooked shell eggs.

(Accepted July 02 1992)