Assessing the Ability of Maternal Antibodies to Protect Broiler Chicks Against Colonization by Salmonella Heidelberg

Assessment of the Effectiveness of Pre-harvest Meat Safety Interventions to Control Foodborne Pathogens in Broilers: a Systematic Review

“…[15-34, 35•, 36-38] and Salmonella spp. [15,19,[39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56] were carried out in thirteen and eleven different countries, respectively. For both pathogens, most of the pre-harvest interventions were assessed in lab-based challenge trials (65% and 82%), while the remaining trials were field trials where no experimental infection was performed.…”

“…The second study investigated if a broiler breeders' vaccination protocol containing two live and two killed vaccines provided adequate protection in the broiler progeny, and if the level of maternal antibody would determine the protective status of broiler progeny. Results showed that broiler breeders' antibody titres wane over time, and therefore, broiler progeny is not protected from early Salmonella colonisation [49].…”

“…Furthermore, two studies reported different vaccination strategies for the control of Salmonella entericia subsp. enterica serovar Heidelberg [44,49]. The first study tested the efficacy of a genetically modified live vaccine, which was able to partially decrease the bacterial load of S. Heidelberg in the caecum and its prevalence in the liver/spleen after oral challenge but had limited duration of immunity [44].…”