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Epidemic encephalitis and American neurology, 1919-1940
1Atkinson Faculty, York University, Toronto, Ontario, Canada. kkroker@yorku.ca
Bulletin of the History of Medicine
|May 27, 2004
Summary
Encephalitis lethargica, an epidemic encephalitis, emerged post-WWI but lacked clear cause, leading to its decline and rebranding. This infectious disease investigation highlights challenges in understanding neurological disorders.
Area of Science:
- Neurology
- Infectious Diseases
- Medical History
Background:
- Encephalitis lethargica (EL) emerged as a significant infectious disease following World War I.
- Despite extensive investigation, its etiology remained elusive, with no consensus on its nature.
- The disease's epidemic status waned by 1940, leading to its reclassification.
Observation:
- Bacteriologic, epidemiologic, and clinical studies failed to establish a definitive cause for EL.
- The emergence of other experimentally demonstrable encephalitides complicated the understanding of EL.
- The Matheson Commission aimed to use EL as a model for causal analysis of nervous diseases.
Findings:
- The Matheson Commission's goal to replace clinical phenomenology with laboratory-based causal analysis for EL was not met.
- Failure to establish EL as a successful model disease contributed to its eventual abandonment.
- Encephalitis lethargica, once a prominent epidemic, was largely forgotten.
Implications:
- The study underscores the historical challenges in identifying the cause of novel infectious neurological diseases.
- The experience with EL highlights the difficulties in establishing a disease as a reliable model for scientific study.
- Understanding the historical trajectory of EL offers insights into the evolution of neurological disease research and classification.