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Volume 16, Number 1—January 2010

Research

Norovirus Gastroenteritis Outbreak with a Secretor-independent Susceptibility Pattern, Sweden

Johan Nordgren, Elin Kindberg, Per-Eric Lindgren, Andreas Matussek, and Lennart SvenssonComments to Author 
Author affiliations: University of Linköping, Linköping, Sweden (J. Nordgren, E. Kindberg, P.-E. Lindgren, L. Svensson); National Board of Forensic Medicine, Linköping (E. Kindberg); County Hospital Ryhov, Jönköping, Sweden (P.-E. Lindgren, A. Matussek); Capio St Görans Hospital, Stockholm, Sweden (A. Matussek)

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Table 2

Influence of secretor status, FUT2 polymorphism, and histo-blood group antigens on risk for norovirus GI.3 symptomatic infection, Sweden*

Secretor status OR (95% CI) p value
Secretor, n = 68 0.71 (0.23–2.18) 0.57
Nonsecretor, n = 15
1.41 (0.46-4.36)
0.57
FUT2 428 polymorphism
G/G (secretor), n = 35 0.67 (0.27–1.65) 0.50
G/A (secretor), n = 33 1.20 (0.49–2.95) 0.82
A/A (nonsecretor), n = 15
1.41 (0.46–4.36)
0.57
Histo-blood group antigens
Blood type,† n = 68
A, n = 32 1.56 (0.58–4.16) 0.46
B, n = 12 0.27 (0.05–1.33) 0.11
O, n = 23 1.39 (0.50–3.89) 0.60
AB, n = 1 Not applicable‡ 1.0
Lewis, n = 83
Lea+b–, n = 12 2.42 (0.70–8.42) 0.21
Lea-b+, n = 61 0.73 (0.27–1.95) 0.61
Lea–b–, n = 10 0.61 (0.15–2.57) 0.73

*FUT, fucosyltransferase; OR, odds ratio; CI, confidence interval.
†Compared between secretors. ABO blood group could only be determined for the 68 secretor-positive persons.
‡No carrier of blood type AB was symptomatically infected with norovirus.

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