Other Diseases of the Nervous System

Other Diseases of the Nervous System - heart and cause...

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Other Diseases of the Nervous System Sleeping sickness (trypanosomiasis). Sleeping sickness  is also known as  trypanosomiasis  because the etiologic agent is a protozoan belonging to the genus  Trypanosoma.   The species  responsible for  African  sleeping sickness is  T. brucei   , which is transmitted by tsetse flies and  infects the blood of patients. Headache, lassitude, tremors, and uncoordinated movements  characterize infection of the nervous system. Blood smears reveal the trypanosomes, and drug  therapy is available with pentamidine and suramin.  The  South American  form of sleeping sickness is also known as  Chagas' disease.  The etiologic  agent is  T. cruzi.   This trypanosome is transmitted by triatomid bugs. The organisms affect the  nervous system of patients as well as the heart tissue. Often they destroy the nerve ganglia of the 
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Unformatted text preview: heart and cause severe heart disease. Slow-developing diseases. Other diseases of the nervous system are believed due to viruses that have not yet been isolated. An example is kuru , a slow-developing disease observed in South Pacific peoples. Kuru is called a “slow virus disease” because the symptoms, which include nervous tremors, take over a year to appear. Similar diseases are Creutzfeldt-Jakob disease, scrapie (in goats and sheep), bovine spongiform encephalopathy (the “mad cow disease”), and a number of other diseases possibly caused by prions. Prions are protein particles that do not appear to have nucleic acid associated with them....
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