| Popis: |
The aim of the current study was to evaluate effects of two alternative hatching systems (hatchery-feeding and on-farm hatching) compared to conventional hatching systems with respect to chick quality, welfare and health of a young breeder flock. To study the effect of treatments on the competence of the humoral immune response, blood titres after a live attenuated NCD vaccination was assessed. To study differences in disease resilience, the susceptibility to develop tracheal inflammation after infection with a life attenuated infectious bronchitis vaccine virus was assessed by trachea lesion scoring and expression of genes related to epithelial integrity and inflammatory responses. |
