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Volume 8, Number 4—April 2002

Dispatch

Salmonella enterica Serotype Enteritidis Phage Type 4b Outbreak Associated with Bean Sprouts

Yvonne THP van Duynhoven*Comments to Author , Marc-Alain Widdowson*, Carolien M. de Jager*, Teresa Fernandes*, Sabine Neppelenbroek*, Winette van den Brandhof*, Wim J.B. Wannet*, Jan A. van Kooij†, Henk J.M. Rietveld‡, and Wilfrid van Pelt*
Author affiliations: *National Institute of Public Health and the Environment, Bilthoven, the Netherlands; †Inspectorate for Health Protection and Veterinary Public Health, the Hague, the Netherlands; ‡Inspectorate for Health Protection and Veterinary Public Health, Region East, Zutphen, the Netherlands;

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Table

Matched univariate analysis (24 pairs) of the association between Salmonella enterica serotype Enteritidis phage type 4b infection and various food items, the Netherlands, November–December, 2000

Food item Exposed case, unexposed control
No. of pairs Unexposed case, exposed control
No. of pairs Matched ORa (CI)b % Cases exposed
Chicken 8 2 3.0 (0.8-38.7) 71
Beef 2 5 0.4 (0.04-2.4) 71
Fish 6 3 2.0 (0.4-12.4) 54
Eggs 4 2 2.0 (0.3-22.1) 79
Tomato 9 3 3.0 (0.8-17.2) 71
Lettuce 5 8 0.6 (0.2-2.2) 50
Alfalfa sprouts 1 0 Undefined 4
Cabbage 5 5 1.0 (0.2-4.4) 38
Bean sprouts 13 1 13.0 (2.0-552.5) 58
Cucumber 6 4 1.5 (0.4-7.2) 63
Paprika 6 4 1.5 (0.4-7.2) 54
Peppers 4 0 Undefined 17
Onion 9 3 3.0 (0.8-17.2) 67
Carrots 6 8 0.8 (0.2-2.5) 46
Parsley 6 2 3.0 (0.5-30.4) 38
Celery 7 2 3.5 (0.7-34.5) 29

aMaximum Likelihood Estimate of odds ratio (OR).
bExact 95% confident limits for Maximum Likelihood Estimate of OR.

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