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Prion Disease

Prion diseases are Transmissible Spongiform Encephalopathies or TSE that affect humans and animals. In humans, they cause neurological disorders that are progressively degenerative. A prion is an abnormal pathogen that affects proteins found in the brain causing them to fold and clump unnaturally. This then leads to brain damage that is progressive. Prion diseases may occur spontaneously, may be inherited or may be acquired from contaminated material.


The most common form of prion disease is Creutzfeldt Jakob Disease or CJD. A variant of CJD is the 'mad cow disease'. The infection passes on to humans through contaminated meat. The most common pathologic feature of CJD is the formation of vacuoles (fluid filled spaces) in the brain giving rise to sponge-like appearance. CJD is one of several spongiform encephalopathies. Others include Kuru and Gerstmann Straussler Scheinker Syndrome.


Typical symptoms of prion disease include muscle stiffness, dementia, hallucinations, ataxia and fatigue. There is a change in the personality and behavior of the person. Diagnostic tests such as brain MRI, Spinal tap, EEG and blood tests are done to understand the condition. Brain tissue biopsy helps to confirm the disease. With rapid progression of the disease, the patient needs help in taking care of himself and might need to be moved to assisted care.


Kuru is another degenerative human spongiform encephalopathy disease that afflicted the Fore people from Papua, New Guinea due to ritual cannibalism.

GSS or Gerstmann Straussler Scheinker Syndrome is a rare neurological disorder due to brain degeneration. It is mostly inherited and sets in middle age. Initially the patient suffers cerebellar ataxia (lack of muscular coordination) and gradually deteriorates to dementia. There might be Nystagmus (rapid involuntary eye movements) and visual problems. There is a possibility of developing Parkinsons disease too. With rapid progression of the disease, the patient needs help in taking care of himself and might need to be moved to assisted care.


FFI or Fatal Familial Insomnia is a type of prion disease where the patient has difficulty in walking and falling asleep. There might be weight loss and excessive tears in the eye. It rapidly deteriorates to loss of consciousness and death. Initially the patient suffers insomnia that later worsens to include panic attacks, phobia and hallucinations. There might be weight loss and incontinence. After this, the patient might suffer dementia and sudden death.


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Collection of Pages - Last revised Date: October 13, 2024