Necessary cause
Necessary cause
Necessary cause (neh-seh-suh-ree kawz) is a term used in epidemiology and medicine to describe a factor that must be present for a disease or condition to occur.
Etymology
The term "necessary cause" is derived from the Latin words "necessarius" meaning necessary, and "causa" meaning cause.
Definition
A necessary cause is a condition that must be present for a disease or condition to occur. This means that without the presence of this cause, the disease or condition cannot develop. For example, the Human Immunodeficiency Virus (HIV) is a necessary cause for Acquired Immunodeficiency Syndrome (AIDS). Without the presence of HIV, AIDS cannot develop.
Related Terms
- Sufficient cause: A cause that is enough on its own to produce a specific effect or outcome. It is not necessary for any other causes to be present for the effect to occur.
- Risk factor: A characteristic, condition, or behavior that increases the likelihood of getting a disease or injury.
- Etiology: The study of the causes or origins of disease.
- Pathogenesis: The development of unhealthy conditions or disease, or the study of such development.
See Also
External links
- Medical encyclopedia article on Necessary cause
- Wikipedia's article - Necessary cause
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