Fig. 8From: Expression of chicken interleukin-2 by a highly virulent strain of Newcastle disease virus leads to decreased systemic viral load but does not significantly affect mortality in chickensTitration of rZJ1-IL2 and rZJ1-GFP in oral (panel a) and cloacal (panel b) secretions of infected birds. *indicates significant difference between rZJ1-GFP- versus rZJ1-IL2-infected groups (p < 0.05). Bars represent standard deviation, n = 5Back to article page