Viral RNA load and immune response in BAGV-inoculated grey partridges. A Viral genome load in blood, swabs (oropharyngeal, cloacal) and immature feathers. The course of the viral RNA load in each type of sample, measured by real-time RT-PCR, is represented at different dpi. The discontinuous line indicates viral RNA load in oral swabs; the dotted line the viral RNA load in cloacal swabs; the double line and open circles the viral RNA load in feathers; the continuous line the viral RNA load in blood. Error bars represent the standard deviation of the data. B Antibody response to BAGV in serum. Mean log titres of BAGV-NtAb (detected by VNT) measured on different dpi. Error bars represent the standard deviation of the data.