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Table 3 Log10 numbers of genome copies of BRSV per swab in calves of inoculated group (IG, calf I1 and I2) and exposed group (EG, calf E1–E6) from first day of exposure of IG to EG to the last day where nasal swabs positive for viral RNA were detected with ddPCR (D27)

From: Bovine respiratory syncytial virus in experimentally exposed and rechallenged calves; viral shedding related to clinical signs and the potential for transmission

Day post- exposure EG

Log10 genome copies BRSV/swab in IG and EG calves

I1

I2

E1

E2

E3

E4

E5

E6

0

3.0

–

–

–

–

–

–

–

1

5.2

–

–

–

–

–

2.5

–

2

7.5

7.5

–

–

–

2.8

–

3.3

3

7.9

–

6.0

–

2.2

4.7

4.3

3.5

4

8.0

7.4

2.7

–

4.3

–

3.8

4.0

5

8.6

7.3

3.1

3.3

2.5

3.6

6.4

4.2

6

7.7

7.3

3.7

4.8

2.9

5.3

7.6

6.3

8

4.6

4.3

4.9

5.6

3.4

7.5

8.1

8.0

9

5.1

4.8

7.4

6.8

7.3

8.5

8.7

8.1

11

4.4

4.1

7.8

7.8

8.2

7.4

6.4

6.8

13

4.0

4.1

6.9

6.9

5.9

3.9

4.9

4.7

15

3.1

3.4

3.5

3.7

3.4

3.6

5.6

3.0

17

–

3.1

–

4.6

–

–

4.8

4.2

19

–

–

–

–

–

3.2

3.8

–

21

–

–

–

–

–

4.6

–

5.0

25

–

–

–

–

3.3

–

–

–

27

–

–

–

–

–

3.3

2.5

–