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Table 4 Distribution of the serotypes in Beijing from 1994 to 2010 (by gender)

From: Changing trends and serotype distribution of Shigella species in Beijing from 1994 to 2010

Shigella species and serotypes No. (%) of isolates Total Chi-square test
Female Male p value
S. flexneri serotype 1a 59 (0.99) 112 (1.89) 171 p < 0.03
S. flexneri serotype 1b 6 (0.10) 8 (0.13) 14 p > 0.1
S. flexneri serotype 2a 1,152 (19.41) 2008 (33.84) 3,160 p < 0.001
S. flexneri serotype 2b 71 (1.20) 67 (1.13) 138 p < 0.003
S. flexneri serotype 3a 8 (0.13) 22 (0.37) 30 p > 0.05
S. flexneri serotype 3b 2 (0.03) 1 (0.02) 3 p > 0.1
S. flexneri serotype 4a 71 (1.20) 102 (1.72) 173 p > 0.05
S. flexneri serotype 4b 14 (0.24) 33 (0.56) 47 p > 0.05
S. flexneri serotype 4c 75 (1.26) 113 (1.90) 188 p > 0.05
S. flexneri serotype 5 3 (0.05) 27 (0.46) 30 p < 0.001
S. flexneri serotype 6 29 (0.49) 24 (0.40) 53 p < 0.04
S. flexneri serotype x 68 (1.15) 110 (1.85) 178 p > 0.05
S. flexneri serotype y 40 (0.67) 70 (1.18) 110 p > 0.05
S. sonnei 719 (12.12) 920 (15.50) 1,639 p < 0.0001
Total 2,317 (39.00) 3,617 (61.00) 5,934