Table 1 Virus isolation from poultry and environmental samples collected on four epidemiologically linked farms

From: Poultry farms as a source of avian influenza A (H7N9) virus reassortment and human infection

Site

Collection date

Sample species

Sample types

Sample number

FluA positive

Virus isolation

H7N9

H9N2

1

Feb 20–Feb 21

Ck

O

18

9

5

2

   

C

17

0

0

0

   

O/C

1

1

1

0

  

Gs

O

1

1

0

0

  

Tk

O

1

1

0

0

  

Env

F

25

1

0

0

   

W

8

3

0

1

   

Cs

13

7

0

0

2

Feb 24–Feb 25

Env

Swabs

7

4

0

0

   

Cs

4

0

0

0

   

F

4

0

0

0

3

Feb 22

Ck

O

6

0

0

0

   

C

6

0

0

0

  

Env

F

88

0

0

0

   

Cs

63

0

0

0

   

S

2

0

0

0

4

Feb 21

Ck

O

3

0

0

0

   

C

3

0

0

0

  

Env

F

5

0

0

0

   

Cs

4

0

0

0

Total

   

279

27

6

3

  1. Species: Ck (chicken), Gs (goose), Tk (turkey), Env (environment).
  2. Sample types: O (oropharyngeal), C (cloacal), F (chicken feces), W (drinking water), Cs (cage swabs), S (sewage).