Question: Viliuisk encephalomyelitis is diagnosed in which geographical area?

Context:
BACKGROUND: Viliuisk encephalomyelitis (VE) is an endemic neurological disease in Northeast Siberia and generally considered to be a chronic encephalomyelitis of unknown origin actually spreading in the Sakha (Yakutian) Republic.
Communicating hydrocephalus following eosinophilic meningitis is pathogenic for chronic Viliuisk encephalomyelitis in Northeastern Siberia.
Epidemiology of Viliuisk encephalomyelitis in Eastern Siberia.
. An epidemic of this disease has been spreading throughout the Yakut Republic of the Russian Federation.
METHODS: Detailed clinical, pathologic, laboratory, and epidemiologic studies have identified 414 patients with definite Viliuisk encephalomyelitis in 15 of 33 administrative regions of the Yakut Republic between 1940 and 1999.
Viliuisk encephalomyelitis in Eastern Siberia - analysis of 390 cases.
Viliuisk encephalomyelitis (VE) is a unique disease occurring in the Yakut (Sakha) population of Eastern Siberia. 
Viliuisk encephalomyelitis in Northeastern Siberia is not caused by Borrelia burgdorferi infection.
Viliuisk encephalomyelitis (VE) is an endemic neurological disease in Northeastern Siberia and generally believed to be a chronic encephalomyelitis of unknown origin. 
Viliuisk encephalomyelitis (VE) is an endemic neurological disease in Northeastern Siberia and generally believed to be a chronic encephalomyelitis of unknown origin.
Viliuisk encephalomyelitis (VE) is an endemic neurological disease in Northeast Siberia and generally considered to be a chronic encephalomyelitis of unknown origin actually spreading in the Sakha (Yakutian) Republic.
Viliuisk encephalomyelitis in the Iakut people of Siberia.
Initially identified in a small Yakut-Evenk population on the Viliui River of eastern Siberia, the disease subsequently spread through human contacts to new geographic areas, thus characterizing Viliuisk encephalomyelitis as an emerging infectious disease.
Viliuisk encephalomyelitis (VE) is an unique neurological disease occurring in the Iakut (Sakha) people of Siberia.
Viliuisk encephalomyelitis (VEM) appears to be endemic disease, affecting native population in Yakutia (Yakut, Even, Evenk).
Viliuisk encephalomyelitis (VE) is an endemic neurological disease in Northeast Siberia and generally considered to be a chronic encephalomyelitis of unknown origin actually spreading in the Sakha (Yakutian) Republic.In search for the pathophysiology and causative agent of VE, we performed a cross-sectional study on clinical, serological and neuroimaging data on chronic VE patients during two medical expeditions to three villages within the Viliuiski river basin in the Republic of Sakha in 2000 and to the capital Yakutsk in 2006
Initially identified in a small Yakut-Evenk population on the Viliui River of eastern Siberia, the disease subsequently spread through human contacts to new geographic areas, thus characterizing Viliuisk encephalomyelitis as an emerging infectious disease
Viliuisk encephalomyelitis (VE) is a unique disease occurring in the Yakut (Sakha) population of Eastern Siberia
Viliuisk encephalomyelitis in Northeastern Siberia is not caused by Borrelia burgdorferi infection
Viliuisk encephalomyelitis (VE) is an endemic neurological disease in Northeastern Siberia and generally believed to be a chronic encephalomyelitis of unknown origin
Initially identified in a small Yakut-Evenk population on the Viliui River of eastern Siberia, the disease subsequently spread through human contacts to new geographic areas, thus characterizing Viliuisk encephalomyelitis as an emerging infectious disease.
Viliuisk encephalomyelitis (VE) is an endemic neurological disease in Northeast Siberia and generally considered to be a chronic encephalomyelitis of unknown origin actually spreading in the Sakha (Yakutian) Republic.In search for the pathophysiology and causative agent of VE, we performed a cross-sectional study on clinical, serological and neuroimaging data on chronic VE patients during two medical expeditions to three villages within the Viliuiski river basin in the Republic of Sakha in 2000 and to the capital Yakutsk in 2006.
IgG antibodies to HTLV-I were measured in the sera and/or cerebrospinal fluid from 82 Guamanian patients with amyotrophic lateral sclerosis and parkinsonism-dementia, 164 Guamanian normal controls, 10 patients with kuru from the Eastern Highlands of Papua New Guinea, 4 patients with Viliuisk encephalomyelitis from the Iakut region of eastern Siberia, 45 Italian patients with multiple sclerosis, and 56 patients with polymyositis (49 from the United States and 7 from Jamaica).
Viliuisk encephalomyelitis (VE), a progressive neurological disorder with a fatal outcome usually in several months to 6 yrs after disease onset, is seen only among the Iakut people of Siberia.
Transmission to unrelated persons was documented in a densely populated region around the city of Yakutsk in which Viliuisk encephalomyelitis had not been previously known.
Initially identified in a small Yakut-Evenk population on the Viliui River of eastern Siberia, the disease subsequently spread through human contacts to new geographic areas, thus characterizing Viliuisk encephalomyelitis as an emerging infectious disease..
Epidemiology of Viliuisk encephalomyelitis in Eastern Siberia.
Viliuisk encephalomyelitis in the Iakut people of Siberia.
Viliuisk encephalomyelitis in Eastern Siberia - analysis of 390 cases.

Answer: Viliuisk encephalomyelitis (VE) is an endemic neurological disease in Northeast Siberia and generally considered to be a chronic encephalomyelitis of unknown origin actually spreading in the Sakha (Yakutian) Republic.
Exact answer: Northeast Siberia