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Related Experiment Videos

Fluorosis in the laying hen.

B Van Toledo, G F Combs

    Poultry Science
    |August 1, 1984
    PubMed
    Summary

    High eggshell strength (HES) hens are more sensitive to dietary fluoride toxicity than low eggshell strength (LES) hens. Fluoride negatively impacts HES hen performance and progeny growth more significantly, suggesting bone volume influences fluoride sensitivity.

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    Area of Science:

    • Animal Science
    • Toxicology
    • Poultry Nutrition

    Background:

    • Dietary fluoride is a common contaminant affecting poultry.
    • Eggshell strength varies between genetic strains, potentially influencing responses to toxicants.

    Purpose of the Study:

    • To investigate the differential sensitivity of high eggshell strength (HES) and low eggshell strength (LES) Leghorn hen strains to sodium fluoride toxicity.
    • To evaluate the impact of dietary fluoride on performance, eggshell quality, bone parameters, and progeny growth.

    Main Methods:

    • 150 Single Comb White Leghorn hens from HES and LES strains were fed diets with 0-1200 ppm sodium fluoride for 8 weeks.
    • Evaluated feed consumption, egg production, eggshell characteristics (strength, weight, thickness), bone and plasma mineral content, and progeny growth.

    Main Results:

    • HES hens exhibited greater sensitivity to fluoride, showing larger decreases in feed intake, egg production, and eggshell quality compared to LES hens.
    • Fluoride increased bone magnesium and plasma phosphorus (HES strain) but did not alter bone strength or plasma calcium/magnesium.
    • High fluoride levels reduced HES progeny growth, while LES progeny were unaffected.

    Conclusions:

    • Genetic selection for eggshell strength influences sensitivity to fluoride toxicity in laying hens.
    • The greater bone volume in the LES strain may contribute to its reduced sensitivity by sequestering more fluoride, mitigating systemic effects.

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