Intoxication in a Colombian mercury mine: Aranzazu, 1948-1975

Area of Science:

• Occupational Health
• Environmental Toxicology
• History of Medicine

Background:

• The La Esperanza mercury mine in Aranzazu, Colombia, faced significant challenges due to geological instability and outdated mining technology.
• These conditions led to a high incidence of mercury poisoning among workers, with symptoms including tremors, bleeding gums, and dental issues.

Purpose of the Study:

• To analyze the occupational activities, mercury poisoning incidents, and medical treatments administered to workers at the La Esperanza mine between 1948 and 1975.
• To document the emergence of occupational toxicology in Colombia, linked to this significant occupational health disaster.

Main Methods:

• Historical analysis of worker activities and health records.
• Review of documented poisoning symptoms and medical interventions.
• Examination of the La Esperanza mine's pioneering treatment protocols.

Main Results:

• Difficult mining conditions and inappropriate technology resulted in widespread mercury poisoning.
• The mine pioneered the use of dimercaprol and penicillamine for treating poisoned workers in Colombia.
• The La Esperanza mine incident is recognized as a major occupational health disaster in Colombia.

Conclusions:

• The La Esperanza mine's experience underscores the severe health risks associated with mercury mining and inadequate safety measures.
• The mine's early adoption of specific medical treatments marked a crucial step in the development of occupational toxicology in Colombia.
• This historical case serves as a critical lesson in occupational health and industrial safety management.