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Exacerbative effect of vitamin A on malabsorption syndrome in chicks
Abstract:
The interaction between malabsorption syndrome (MAS) and dietary vitamins A and D was studied in broiler chicks reared in floor pens for 4 weeks. The chicks were naturally infected with MAS, whereas hatchmates fed the same diets but in a separate facility (battery brooder) did not exhibit signs of MAS and, therefore, were considered controls. MAS significantly reduced body weights, bone ash, serum calcium and phosphorus concentrations, and liver lipids and increased the incidence of skeletal abnormalities (tibial dyschondroplasia and rickets). Rather than ameliorating the effects of MAS, vitamin A caused a further reduction in body weight and bone ash. A possible nutrient interaction between vitamin A and vitamin D or vitamin E in birds with MAS may account for the exacerbative effect of vitamin A.
Insights
Malabsorption syndrome (MAS) in broiler chicks impairs growth and bone health. Vitamin A supplementation worsened these effects, suggesting a complex nutrient interaction in affected birds.
Area of Science:
- Avian nutrition
- Animal pathology
- Gastroenterology
Background:
- Malabsorption syndrome (MAS) negatively impacts broiler health and productivity.
- Vitamins A and D are crucial for poultry growth and bone development.
- Understanding nutrient interactions is vital for managing poultry diseases.
Purpose of the Study:
- To investigate the effects of dietary vitamins A and D on broiler chicks with MAS.
- To determine if vitamin A supplementation could mitigate MAS-induced health issues.
Main Methods:
- Broiler chicks were divided into MAS-affected and control groups.
- Diets were supplemented with vitamins A and D.
- Growth performance, bone parameters, and biochemical markers were assessed over 4 weeks.
Main Results:
- MAS significantly reduced body weight, bone ash, serum calcium and phosphorus, and liver lipids.
- MAS increased the incidence of tibial dyschondroplasia and rickets.
- Vitamin A supplementation exacerbated weight loss and reduced bone ash in MAS chicks.
Conclusions:
- MAS severely compromises broiler chick health and skeletal integrity.
- Vitamin A does not ameliorate MAS effects and may worsen outcomes.
- Potential nutrient interactions involving vitamins A, D, or E warrant further investigation in MAS-affected poultry.