Figure 2From: Maternal immunization with vaccines containing recombinant NetB toxin partially protects progeny chickens from necrotic enteritisEgg yolk anti-NetB IgY levels. Fertilized eggs were collected from immunized hens at 30 weeks and specific antibodies derived from the egg yolk measured by ELISA. The error bars represent SEM. **p < 0.01, ***p < 0.001.Back to article page