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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