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Table 2 Number (percentage) of influenza A virus rRT-PCR positive environmental samples by farm and sampling event before whole herd sow vaccination and implementing enhanced biosecurity practices

From: Evaluation of internal farm biosecurity measures combined with sow vaccination to prevent influenza A virus infection in groups of due-to-wean pigs

Experimental group

Farm

Sampling events

 

1 (%)

2 (%)

3 (%)

Total (%)

Treatment

A

6/6a (100)

6/6 (100)

1/4 (25)

13/16 (81.2)

Treatment

B

2/6 (33.3)

3/8 (37.5)

6/6 (100)

11/20 (55)

Treatment

C

0/6 (0)

0/8 (0)

2/10 (20)

2/24 (8.3)

Treatment

D

Not collected

2/6 (33.3)

3/8 (37.5)

5/14 (35.7)

Treatment

E

2/8 (25)

2/10 (20)

1/6 (16.7)

5/24 (20.8)

Control

F

4/6 (67.7)

4/6 (67.7)

6/6 (100)

14/18 (77.7)

  1. Environmental samples were tested individually. A specimen was considered positive when the rRT-PCR cycle threshold was < 37
  2. Sampling events refer to weeks 1, 2 and 3 of the study
  3. aNumber of positive samples / total number of samples tested (percentage)