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What are the three types of Creutzfeldt-Jakob disease (CJD), and what causes them?

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Each of the three types of CJD has a different cause:

  • Sporadic: The most common type, it's caused by proteins in the body called prions. Sometimes, these proteins fold the wrong way, infect the brain, and destroy brain cells.
  • Familial: This happens in people who inherit a bad gene from a parent.
  • Acquired: The rarest form, it happens when someone comes into contact with something infected with CJD.

From: Creutzfeldt-Jakob Disease WebMD Medical Reference

SOURCES:

National Institute of Neurological Disorders and Stroke: “Creutzfeldt-Jakob Disease Fact Sheet.”

Alzheimer’s Association: “Creutzfeldt-Jakob Disease.”

Creutzfeldt-Jakob Foundation: “CJD Fact Sheet.”

CDC: “CJD (Creutzfeldt-Jakob Disease, Classic).”

Reviewed by Carol DerSarkissian on November 28, 2018

SOURCES:

National Institute of Neurological Disorders and Stroke: “Creutzfeldt-Jakob Disease Fact Sheet.”

Alzheimer’s Association: “Creutzfeldt-Jakob Disease.”

Creutzfeldt-Jakob Foundation: “CJD Fact Sheet.”

CDC: “CJD (Creutzfeldt-Jakob Disease, Classic).”

Reviewed by Carol DerSarkissian on November 28, 2018

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What are symptoms of Creutzfeldt-Jakob disease (CJD)?

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