Figure 6
![Figure 6](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1297-9716-42-10/MediaObjects/13567_2010_Article_10_Fig6_HTML.jpg)
Interferon mRNA expression in the cranial and caudal part of the lung after inoculation with LPAI (white bar) or HPAI (black bar) at different time points post inoculation (hpi). IFN-α, IFN-β and IFN-γ mRNA expression was shown as fold induction compared to uninfected birds ± SD. * p < 0.05 between infected and control chickens; line p < 0.05 between the LPAI and HPAI group of a specific time point pi.