This collection features four peer-reviewed reviews on developing immunity in poultry. The first chapter discusses the advances in genetic, genomic and functional genomic studies of immune and disease resistance in chickens. The chapter reviews multi-trait selection experiments and considers the potential trade-offs between production and immunocompetence in response to disease. The second chapter reviews the importance of the gut microbiome in optimising animal health and reducing susceptibility to major diseases affecting poultry production. The chapter examines intestinal immunity, as well as the microbiota interactions which occur within the poultry immune system. The third chapter addresses the nutritional strategies which can be implemented to boost immune function in poultry. The chapter considers the process of nutritional modulation and reviews the use of vitamins, minerals and amino acids to enhance, suppress and balance poultry immune systems. The final chapter provides an overview of the avian defence system and its role in tackling some of the major pathogens affecting global poultry production, such as coccidiosis. The chapter reviews the various elements of the host defence system and considers how supplements can modulate the immune system and its responses to specific challenges.

Incorporating research chapters from academic authors around the world, this book focuses on the most recent scientific advances in understanding phytate; both IP6 and its esters. It examines phytate degradation patterns in the gastrointestinal tract, and investigates the relevance of gut microbiome and endogenous phosphatases on phytate breakdown, as well as regulation and functions of inositol diphosphates IP3, IP4, and IP7, IP8. It also identifies recommendations for formulating for minerals and amino acids in the presence of phytate, including the effects of phytase on protein bioavailability, and the impact of digestible Ca and P in both swine and poultry. This leading science and research is coupled with real-world pragmatism, including a focus on what industry stakeholders are currently doing to counter dietary phytate, and an overview of the role of nutrition in respect of bone health, meat quality, welfare, and antibiotic free production. As such, the content is relevant for scientists, nutritionists and producers alike.