Dieldrin

Dieldrin is a persistent organochlorine insecticide formerly used in agriculture and public-health campaigns. Its toxicity, bioaccumulation, and long environmental lifetime led to extensive restrictions and bans.

GABA receptor: A family of receptors that mediate inhibitory signaling by gamma-aminobutyric acid in the nervous system. Dieldrin disrupts inhibitory signaling by blocking GABA-gated chloride channels.
Stockholm Convention: A global treaty adopted in 2001 to eliminate or restrict persistent organic pollutants. The convention lists dieldrin for elimination, subject to limited exemptions.
Termite control: Methods for preventing or reducing damage caused by termites in buildings and other structures. Dieldrin was widely applied around buildings to control termites before restrictions curtailed use.
DDT: A persistent organochlorine insecticide once used extensively in agriculture and disease-vector control. DDT was a more famous persistent pesticide, but its chemistry and ecological effects differ from dieldrin’s.
Organochlorine pesticides: A class of chlorine-containing pesticides, many of which persist in the environment and accumulate in organisms. Dieldrin belongs to this chemical class, whose persistence shaped its long-term impacts.
Persistent organic pollutant: A toxic chemical that resists degradation, travels through the environment, and can accumulate in organisms. Dieldrin exemplifies the persistence and long-range risks addressed by this category.
Malaria control: Public-health measures that reduce malaria transmission by targeting mosquitoes and their breeding environments. Dieldrin was used in some mosquito-control programs, though DDT became more prominent.
Endrin: A toxic organochlorine insecticide closely related to dieldrin in structure and use. Endrin is a related pesticide with distinct toxicity and regulatory history.
Bioaccumulation: The buildup of a chemical in an organism when uptake exceeds elimination. Dieldrin accumulates in fatty tissues, extending exposure beyond its original use.
Bald eagle: A large North American bird of prey affected by pesticide contamination and habitat loss. Dieldrin exposure contributed to reproductive harm in bald eagles and other wildlife.

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