Spanish methanol poisoning outbreak

A mass poisoning in Spain caused by methanol-adulterated alcoholic drinks, killing dozens and leaving others blind.

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Methanol toxicity: Poisoning caused by methanol and its toxic metabolites, which can damage the optic nerves and cause metabolic acidosis. Methanol in the adulterated drinks produced the characteristic blindness and fatal illness.
Spain in the 1960s: The social, economic, and political setting of Spain during the 1960s under Francoist rule. The outbreak occurred amid rapid social change and uneven public-health protections.
Methanol blindness: Visual impairment or blindness caused by methanol poisoning, often through injury to the optic nerves. Many survivors suffered lasting visual damage from the poisoning.
Turkish methanol poisoning outbreaks: Outbreaks of illness and death in Turkey caused by methanol-adulterated alcoholic drinks. They provide a later national example of the same kind of beverage contamination.
Formaldehyde: A highly reactive chemical formed when alcohol dehydrogenase oxidizes methanol. It is the first toxic metabolite in the pathway from methanol to formic acid.
Francoist Spain: The authoritarian state led by Francisco Franco from the end of the Spanish Civil War until 1975. The poisoning unfolded under institutions and regulations shaped by Francoist rule.
Mass poisoning: An incident in which many people are poisoned by a shared exposure or contaminated source. The outbreak became a public-health emergency because a common product exposed many people.
Czech Republic methanol poisonings: A 2012 outbreak in the Czech Republic caused by methanol-contaminated spirits, with dozens of deaths and severe injuries. This outbreak likewise involved illicit spirits and widespread toxic exposure.
Formic acid: An organic acid formed during methanol metabolism that contributes to acidosis and optic nerve injury. Its accumulation helps explain the victims’ severe acidosis and visual damage.
Methyl alcohol fraud: The deliberate or negligent substitution of methanol for drinkable alcohol in products intended for consumption. Adulteration of alcoholic drinks was the direct source of the outbreak.