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Table 2 Bursa lesion score, three or two chickens sampled each time at various ages.

From: Impact of coccidial infection on vaccine- and vvIBDV in lymphoid tissues of SPF chickens as detected by RT-PCR

Age In days

Group 1

Group 2

Group 3

Group 4

28

1,4,2

1,2,3

4,4,4

3,4,4

29

4,3,2

4,2,1

4,4,4

4,4,1

30

4,1,2

2,3,4

3,4,4

1,3,3

31

1,1,1

1,1,4

3,1,4

2,4,3

36

1,2,1

1,2,1

4,1,1

2,4,1

38

1,1,1

4,4,1

1,1,4

1,1,2

42

1,1,2

1,4,2

1,4,4

3,1,4

44

1,1

2,2,2

1,1

1,2

  1. When bursa lesions involved 1–25% of the follicles, a value of 1 was assigned, 26–50% of follicles a value of 2 was assigned, 51–75% of follicles a value of 3 was assigned, and 76–100% of follicles a value of 4 was assigned.
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Acta Veterinaria Scandinavica

ISSN: 1751-0147