Table 1 Prevalence of avian influenza virus in different types of samples from surveillance system

Poultry samples

2778

124 (4.46)

6 (0.22)

21 (0.76)

36 (1.30)

57 (2.05)

 Feces

2734

110 (4.02)

6 (0.22)

19 (0.69)

28 (1.03)

49 (1.79)

 Anal swabs

14

2 (14.29)

0 (0)

0 (0)

0 (0)

0 (0)

 Throat swabs

16

6 (37.5)

0 (0)

0 (0)

6 (37.5)

6 (37.5)

 Feather swabs

14

6 (42.86)

0 (0)

2 (14.29)

2 (14.29)

2 (14.29)

Environment samples

1760

89 (5.06)

3 (0.17)

47 (2.67)

24 (1.36)

58 (3.30)

 Cage swabs

814

43 (5.28)

3 (0.37)

18 (2.21)

13 (1.60)

23 (2.83)

 Environmental surface swabs

50

9 (18.00)

0 (0)

5 (10.00)

4 (8.00)

9 (18.00)

 Drinking water samples

648

14 (2.16)

0 (0)

7 (1.08)

5 (0.77)

7 (1.08)

 Sewage samples

98

9 (9.18)

0 (0)

6 (6.12)

2 (2.04)

8 (8.16)

 Crib swabs

122

0 (0)

0 (0)

0 (0)

0 (0)

0 (0)

 Chopping board swabs

28

14 (50.00)

0 (0)

11(39.29)

0 (0)

11(39.29)

  Total

4538

213 (4.69)

9 (0.20)

68 (1.50)

60 (1.32)

115 (2.53)

  χ²

–

0.8474

–

26.7553

0.0379

6.7464

  P-value

–

0.3573

1.000^a

< 0.0001

0.8457

0.0094