Miasma hypothesis

Definition

The miasma hypothesis was an early theory that attributed diseases, such as cholera and the plague, to 'bad air' or miasmas emanating from decomposing organic matter. It was a widely accepted explanation for the spread of infectious diseases before the germ theory of disease.

5 Must Know Facts For Your Next Test

1. The miasma hypothesis suggested that diseases were caused by noxious forms of 'bad air' rather than microorganisms.
2. It was a dominant theory in Europe until the late 19th century.
3. John Snow's work on cholera disproved the miasma hypothesis and supported germ theory.
4. Miasma was thought to arise from decaying organic matter, swamps, and poor sanitation conditions.
5. Florence Nightingale also initially supported the miasma hypothesis but later contributed to sanitary reforms based on its principles.

Related terms

Germ Theory:

The scientific theory that microorganisms are the cause of many diseases.

John Snow:

A physician known for his work in tracing the source of a cholera outbreak, which helped disprove the miasma hypothesis.

Sanitation: Measures designed to protect public health through cleanliness and safe disposal of waste, influenced by both miasma and germ theories.