In:
Epidemiology and Infection, Cambridge University Press (CUP), Vol. 129, No. 2 ( 2002-10), p. 287-293
Abstract:
We investigated an outbreak of 54 cases of Salmonella Typhimurium phage type 9 (STM9) with a specific antibiotic resistance pattern. We used sequential analytic studies: two retrospective cohort studies, a case-control study, and a modified case-control study. An outbreak of salmonellosis due to Salmonella Typhimurium PT9 SSu (resistant to streptomycin and sulphafurazole) was identified. Fifty-four cases had illness onset from November 1998 to March 1999. Notifications commenced following a restaurant birthday party in December 1998. An initial cohort and case control study found no association with consumption of custard cake. However, case follow-up identified another cohort of people who had attended a birthday party in February at which 8/27 people who consumed a continental custard cake were ill compared to 0/10 who did not ( P = 0.07). A revised case control study found illness was strongly associated with consumption of a particular continental custard cake (Mantel–Haenszel matched OR ∞, P = 0.00004). This report highlights the epidemiological value of using sequential study types, and persisting with the investigation of apparently sporadic food-borne outbreaks.
Type of Medium:
Online Resource
ISSN:
0950-2688
,
1469-4409
DOI:
10.1017/S0950268802007318
Language:
English
Publisher:
Cambridge University Press (CUP)
Publication Date:
2002
detail.hit.zdb_id:
1470211-3
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