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Vitamin A deficiency in turkey poults
P L Cortes1, A K Tiwary, B Puschner
1California Animal Health and Food Safety Laboratory System (CAHFS), University of California, Fresno Branch, 2789 South Orange Avenue, Fresno, CA 93725, USA.
Summary
Vitamin A deficiency caused stunted growth, incoordination, and increased mortality in turkey poults. This case highlights the critical role of adequate vitamin A for poultry health and development.
Area of Science:
- Veterinary Pathology
- Avian Medicine
- Nutritional Pathology
Background:
- Vitamin A deficiency is a significant concern in poultry production, potentially leading to severe health issues.
- Clinical signs and pathological findings associated with vitamin A deficiency can vary across avian species.
Purpose of the Study:
- To document and describe the first reported case of vitamin A deficiency in commercial turkey poults.
- To correlate gross and microscopic lesions with biochemical findings in affected poults.
Main Methods:
- Necropsy and histopathological examination of affected turkey poults.
- Analysis of feed for vitamin A content.
- Measurement of serum and liver vitamin A concentrations in affected birds.
Main Results:
- Affected poults exhibited stunted growth, ruffled feathers, incoordination, and depression.
- Grossly, pale white pseudomembranous material was observed in the oral cavity, esophagus, and crop.
- Histopathology revealed squamous metaplasia in various tissues, including the oral mucosa, esophagus, and bursa of Fabricius.
- Feed analysis showed undetectable vitamin A levels, and serum and liver concentrations were critically low.
Conclusions:
- The findings confirm a diagnosis of vitamin A deficiency in the commercial flock.
- This case provides a detailed account of the pathology associated with vitamin A deficiency in turkey poults, valuable for comparative pathology.
- Ensuring adequate dietary vitamin A is crucial for preventing deficiency-related diseases in commercial poultry.
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