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Influenza Encyclopedia

ï~~ Registrars Will Please Preserve ARIL 1, 1919 OFFICIAL BULLETIN NEW YORK STATE DEPARTMENT OF HEALTH ALBANY, N. Y. HERMANN M. BIGGS, M.D., Commissioner VOL. IV ISSUED FORTNIGHTLY V. S. No. 4 Edited by OTTO R. EICHEL, M. D., Director, Division of Vital Statistics SO-CALLED "SLEEPING SICKNESS'" Its Classification in Vital Statistics Tables Registrars are hereby advised to classify deaths certified as due to " sleeping sickness " under Title 6o, encephalitis, of the detailed International List of Causes of Death. When this cause of death is given jointly with influenza, the latter should be regarded as the preferred cause; in other respects also, it is advisable to follow the standard Index of Joint Causes of Death. For the present, the disease should be regarded as of unknown causation. Its relation to other diseases, especially to influenza and poliomyelitis, has not been proved. It affects chiefly the central nervous system, and has been named encephalitis letlargica. It was described and named in 1917 by von Economo who observed, in all, 13 cases in Vienna. The largest series of cases reported. 168 in all. occurred in England in 1918; and what seems to have been a smaller series of cases was observed in that year in France. Recently what seems to be the same disease has appeared in the United States. The Austrian, British, and French observers do not attribute cases occurring in their respective countries to influenza or other well known diseases, although the resemblance of the pathological lesions in the nervous system to those occurring in poliomyelitis has led to a discussion of the points of resemblance and difference of the two diseases. It is not even established that in Europe encephalitis lethargica showed V. S. No. p. 41

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