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Table 4 Determination of the LD50 of P. multocida 0818 and the Δcrp mutant

From: Identification of the crp gene in avian Pasteurella multocida and evaluation of the effects of crp deletion on its phenotype, virulence and immunogenicity

Route

Strains

Challenge dose (CFU) and survival

LD50 (CFU)

103

104

105

106

107

108

109

Intranasal

P. multocida 0818

5/5

7/8

8/16

1/16

0/16

0/8

0/8

8.66 × 104

S416 (Δcrp)

-

8/8

7/8

11/16

7/16

1/16

0/8

7.4 × 106

  1. -, Not detected