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A rapid bioassay system for lead using young Japanese quail
Journal of Environmental Pathology and Toxicology
|January 1, 1979
Summary
This study developed a rapid bioassay for lead toxicity in young Japanese quail. Even low dietary lead levels (14.8 ppm) inhibited enzyme activity and increased lead in tissues, indicating sensitivity.
Area of Science:
- Environmental Toxicology
- Animal Science
- Biochemistry
Background:
- Lead exposure is a significant environmental concern affecting wildlife and potentially humans.
- Assessing lead toxicity requires reliable and sensitive bioassays.
Purpose of the Study:
- To establish a rapid bioassay for lead toxicity using young Japanese quail.
- To determine the effects of varying dietary lead concentrations on quail physiology and tissue lead accumulation.
Main Methods:
- Young Japanese quail were fed purified diets with lead acetate concentrations ranging from 14.8 to 1223 ppm for two weeks.
- Tissue samples (duodenum, kidneys, liver, tibias) were analyzed for lead content.
- Biochemical markers including free erythrocyte protoporphyrin and red blood cell delta-aminolevulinic acid dehydratase (RBC-ALAD) activity were measured.
Main Results:
- Dietary lead at 563 and 1223 ppm decreased body weight and increased free erythrocyte protoporphyrin.
- RBC-ALAD activity was inhibited at lead levels as low as 14.8 ppm.
- Tibia lead concentration showed the most distinct group means and linear response to dietary lead.
Conclusions:
- The developed bioassay is sensitive to low dietary lead levels.
- Japanese quail can serve as a model organism for rapid lead toxicity assessment.
- The tibia is a reliable indicator tissue for lead bioaccumulation in this model.