Changes in eggshell structure and predisposition of broilers to health problems: is there a common pathophysiology?

Area of Science:

• Poultry Science
• Animal Health
• Hatchery Operations

Background:

• Eggshell structural quality is a critical factor in broiler production.
• Variations in eggshell matrix optical density may influence chick health and disease risk.

Purpose of the Study:

• To investigate the association between eggshell matrix optical density and broiler disease risk.
• To determine the impact of eggshell quality on hatching success, chick health, and production losses.

Main Methods:

• Examined 10,000 broiler breeder eggs, classifying them by high or low eggshell matrix density.
• Incubated eggs, hatched chicks, and monitored flock performance, morbidity, and mortality.
• Analyzed unhatched eggs for reproductive failure causes and compiled condemnation data post-processing.

Main Results:

• Low-density eggshell matrix eggs had significantly more unhatched eggs and fewer quality chicks.
• Eggs and embryos from the low-density group were three times more likely to be infected.
• Broilers from the low-density eggshell group experienced higher mortality, morbidity, and carcass condemnations.

Conclusions:

• Low eggshell matrix density is linked to increased reproductive failure and disease susceptibility in broilers.
• Metabolic changes in breeder hens affecting eggshell quality can predispose chicks to health issues.
• Improving eggshell structural quality is vital for reducing production losses and enhancing broiler health.