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Table 2 Median annual incidence of infections caused by S. sonnei or S. flexneri by illness severity among adults aged 18 years — Foodborne Diseases Active Surveillance Network, 2002–2014

From: Disparities in severe shigellosis among adults — Foodborne diseases active surveillance network, 2002–2014

  Incidence per 100,000 (IQRa)
Severe shigellosis Shigellosis
All 0.56 (0.49–0.70) 2.17 (1.83–2.33)
Sex
 Male 0.63 (0.53–0.89) 2.22 (1.98–2.75)
 Female 0.50 (0.41–0.59) 1.89 (1.78–2.28)
Age group, years
 18–49 0.67 (0.60–0.88) 2.77 (2.27–3.06)
 ≥ 50 0.39 (0.33–0.45) 1.22 (0.96–1.34)
Race
 Black 1.42 (1.13–1.91) 3.58 (3.45–4.95)
 White 0.44 (0.37–0.51) 1.80 (1.66–2.09)
 Other Not assessedb Not assessedb
Species
S. flexneri 0.19 (0.16–0.23) 0.60 (0.56–0.64)
S. sonnei 0.39 (0.31–0.43) 1.57 (1.24–1.73)
  1. aInterquartile range; bUnable to assess because of limited sample size