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Table 3 The LD50 of strains APEC94 and APEC94Δlsr(Cm)

From: Lsr operon is associated with AI-2 transfer and pathogenicity in avian pathogenic Escherichia coli

APEC strainsChallenge dosageNo. of ducksMortalityLiving No.Mortality rate (%)LD50 (CFU)
APEC941098801008.66 × 105
10887187.5
10787187.5
10684450
10582625
APEC94Δlsr(Cm)10987187.52.55 × 108
10882625
10781712.5
1068080
1058080