Group of chicken
Challenge dose (CFU)
Challenge strain (serotype)
Survival after challenge
1
4.5 × 10
3
P-1059 (A:3)
5/5
2
BHI broth
P-1059 (A:3)
0/5
3
3.7 × 10
3
X-73 (A:1)
4/5
4
BHI broth
X-73 (A:1)
0/5
Table 6:
Protection confirmed in chickens by immunization of live
P. multocida
Δ
hexB
against challenge with
P. multocida
strains.
