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Related Experiment Videos

Acute 2,4-dichlorophenoxyacetic acid intoxication in broiler chicks

M S Morgulis1, G H Oliveira, M L Dagli

  • 1Research Center for Veterinary Toxicology (CEPTOX), Department of Pathology, School of Veterinary Medicine, University of São Paulo, SP, Brazil.

Poultry Science
|June 20, 1998
PubMed
Summary

Acute exposure to the herbicide 2,4-dichlorophenoxyacetic acid (2,4-D) in chicks caused dose-dependent muscle and kidney damage. The lethal dose 50% (LD50) was determined to be 420 mg/kg body weight.

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Area of Science:

  • Veterinary Toxicology
  • Environmental Health
  • Agricultural Science

Background:

  • 2,4-dichlorophenoxyacetic acid (2,4-D) is a widely used herbicide.
  • Understanding its acute toxicity in avian species is crucial for environmental and agricultural safety.
  • Chicks serve as a relevant model for studying herbicide effects in poultry.

Purpose of the Study:

  • To determine the acute oral toxicity of 2,4-D in chicks.
  • To identify clinical, laboratory, and histopathological indicators of 2,4-D intoxication.
  • To establish the lethal dose 50% (LD50) for 2,4-D in this species.

Main Methods:

  • Chicks were orally administered varying doses of 2,4-D (100-600 mg/kg BW).
  • Toxicity was assessed through clinical observations, serum biochemistry (CK, AP, UA, CR, TP, AST, ALT), and histopathology.

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  • Herbicide levels in serum were analyzed using chromatography.
  • Main Results:

    • 2,4-D exposure decreased motor activity, induced muscle weakness, and reduced weight gain.
    • Elevated serum CK, AP, UA, CR, and TP levels were observed, indicating tissue damage.
    • Histopathology revealed hepatic, renal, and intestinal lesions, with primary damage to kidney and muscle tissues.

    Conclusions:

    • Acute 2,4-D intoxication in chicks primarily affects muscle and kidney tissues.
    • The observed toxic effects are dose- and time-dependent and reversible.
    • The oral LD50 of 2,4-D in chicks was determined to be 420 mg/kg BW.