Germ theory of disease

Definition

Germ theory of disease states that microorganisms are the cause of many diseases. This theory revolutionized medical practices by emphasizing the role of pathogens in infection.

5 Must Know Facts For Your Next Test

1. Louis Pasteur and Robert Koch were key figures in developing and proving germ theory.
2. Germ theory replaced the miasma theory, which attributed illness to 'bad air' or miasmas.
3. Koch's postulates provided a framework for linking specific microbes to specific diseases.
4. Germ theory led to advances in sterilization, vaccination, and antibiotic development.
5. The discovery of pathogens such as bacteria, viruses, fungi, and protozoa was pivotal in validating germ theory.

Review Questions

Related terms

Pathogen:

A microorganism that causes disease.

Koch's Postulates:

Criteria established by Robert Koch to identify a causative relationship between a microbe and a disease.

Miasma Theory:

An outdated belief that diseases were caused by 'bad air' or miasmas rather than microorganisms.