Currently, no efficient and sustainable control measures exist that reduce cecal Campylobacter numbers in broiler chickens. During the research project "CAMPOUL", we delivered proof of concept that passive immunization of broiler chicks by oral administration of egg yolk antibodies against Campylobacter jejuni, protects the birds against C. jejuni colonization. The current project proposal aims at studying efficacy and feasibility of applying passive immunization against C. jejuni and C. coli in the broiler industry. Moreover, we will determine to which extent broiler chicks can be successfully immunized against Campylobacter infection.