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Table 2 Cross-protection experiment

From: Disruption of the M949_RS01915 gene changed the bacterial lipopolysaccharide pattern, pathogenicity and gene expression of Riemerella anatipestifer

Groups

Challenge strains

Total no. of ducks

Protection rate (protected no./total no.)a

1

(RA1067 vaccine)

WJ4

8

7/8

Yb2

8

6/8

HXb2

8

7/8

2

(CH3 vaccine)

WJ4

8

7/8

Yb2

8

2/8

HXb2

8

5/8

3

(Saline in adjuvant)

WJ4

8

0

Yb2

8

0

HXb2

8

0

  1. a Challenge dose was 10 LD50 for each strain.