Toxocara canis infection lowers IQ independent of socioeconomic and racial factors

Evidence

It found that children without the infection scored considerably higher on both intelligence-test scales, even after correcting for a laundry list of potentially confounding factors, like “socioeconomic status, ethnicity, gender, rural residence, cytomegalovirus infection, and blood levels of lead, all of which have been implicated in affecting intelligence test scores.”65 — Harriet A. Washington, A Terrible Thing to Waste, 980

Categorization

• corroborated: 2 independent passages support this claim — Harriet A. Washington, A Terrible Thing to Waste, 980
• XREF: connects to: Eugenic ideology suppressed research into infectious causes of low IQ — Harriet A. Washington, A Terrible Thing to Waste, 916; Rapid IQ gains from reduced disease burden rule out genetic explanations — Harriet A. Washington, A Terrible Thing to Waste, 945; Iodine deficiency is a major unrecognized cause of lowered intelligence — Harriet A. Washington, A Terrible Thing to Waste, 21 (+10 more)

Related

• Disease-reduction interventions like vaccination and clean water could raise national IQ scores #expands (0.70) — The Flynn Effect and IQ Disparities Among Races, Ethnicities, and Nations: Are There Common Links?

Broader Connections

• Iodine deficiency is the leading global cause of mental retardation #corroborates (0.68) — The Cognitive Effects of Micronutrient Deficiency: Evidence from Salt Iodization in the United States
• Iodine deficiency is a major unrecognized cause of lowered intelligence #corroborates (0.65) — Harriet A. Washington, A Terrible Thing to Waste, 21
• Adding iodine to salt in 1924 raised average U.S. IQ scores #exemplifies (0.60) — Did iodized salt raise the IQ of 50 million Americans by 15 points?