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Volume 9, Number 4—April 2003

Dispatch

First Incursion of Salmonella enterica Serotype Typhimurium DT160 into New Zealand

Craig N. Thornley*Comments to Author , Greg C. Simmons†, Megan L. Callaghan†, Carolyn M. Nicol*, Michael G. Baker*, Kylie S. Gilmore*, and Nicholas K.G. Garrett‡
Author affiliations: *Institute of Environmental Science & Research Limited, Kenepuru Science Centre, Porirua, New Zealand; †Auckland Regional Public Health Service, Auckland District Health Board, Auckland, New Zealand; ‡Mt. Albert Science Centre, Auckland, New Zealand

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Table

Frequency of selected exposures among case-patients and controls, Salmonella Typhimurium DT160 outbreak, New Zealand, 2001a

Exposure
No. (%)
Matched OR 95% CI p value
Case-patients
n = 119 Controls
n = 235
Direct handling of a dead wild birds
13 (10.9)
3 (1.3)
12.28
2.76 to 54.63
0.001
Exposure to person with D&V in household in 3 d before illness in case-patient
7 (5.9)
3 (1.3)
4.67
1.21 to 18.05
0.03
Exposure to person with D&V in any setting in 3 d before illness in case-patient
14 (11.8)
8 (3.4)
3.81
1.53 to 9.49
0.004
Exposure to person with D&V in household in 28 d before illness in case-patient
11 (9.2)
8 (3.4)
3.11
1.13 to 8.54
0.03
Exposure to person with D&V in any setting in 28 d before illness in case-patient
28 (23.5)
20 (8.5)
3.05
1.64 to 5.69
<0.001
Consumption of food at a large gathering
24 (20.2)
23 (9.8)
2.44
1.27 to 4.68
0.007
Consumption of any fast food
69 (58.0)
111 (47.2)
1.69
1.04 to 2.75
0.04
Drinking of roof-collected rainwater
12 (10.1)
19 (8.1)
2.35
0.55 to 10.05
0.25
Consumption of raw eggs 5 (4.2) 3 (1.3) 3.33 0.80 to 13.95 0.10

aDT, definitive type; D&V, diarrhea and vomiting; OR, odds ratio; CI, confidence interval.

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