COVID-19 and Parkinson's Disease: Are We Dealing with Short-term Impacts or Something Worse? H1N1 virus. 1997 Dec;90(12):709-10. The exact number of people infected is unknown, but it is estimated that more than one million people contracted the disease during the epidemic, which directly caused more than 500,000 deaths. Given that it appears after the acute episode has disappeared, molecular mimetism has been proposed to explain the autoimmune lesion. [18], In 2010, in a substantial Oxford University Press compendium reviewing the historic and contemporary views on EL, its editor, Joel Vilensky, of the Indiana University School of Medicine, quotes another researcher, writing in 1930, who states, "we must confess that etiology is still obscure, the causative agent still unknown, the pathological riddle still unsolved…", and goes on to offer the following conclusion, as of that publication date:.mw-parser-output .templatequote{overflow:hidden;margin:1em 0;padding:0 40px}.mw-parser-output .templatequote .templatequotecite{line-height:1.5em;text-align:left;padding-left:1.6em;margin-top:0}, Does the present volume solve the "riddle" of EL, which… has been referred to as the greatest medical mystery of the 20th century? Accessibility [11][17], The German neurologist Felix Stern, who examined hundreds of encephalitis lethargica patients during the 1920s, pointed out that their encephalitis lethargica typically evolved over time. Since the 1916–1927 epidemic, only sporadic cases have been described. Another fascinating foray into medical history from the author of The American Plague. The cause remains a mystery, yet it’s no surprise that the sleepy sickness epidemic is not a well known part of the 1920s history. In reviewing the relationship between influenza and encephalitis lethargica (EL), McCall and coworkers conclude, as of 2008, that "the case against influenza [is] less decisive than currently perceived… there is little direct evidence supporting influenza in the etiology of EL," and that "[a]lmost 100 years after the EL epidemic, its etiology remains enigmatic. Postencephalitic Parkinson's disease may develop after a bout of encephalitis-sometimes as long as a year after the illness. doi: 10.1371/journal.pone.0245171. It was first described in Vienna in 1916 by Constantin von Economo in thirteen patients suffering from unusual neurological symptoms that he thought constituted a new entity and called encephalitis lethargica. This almost certainly applies to the numerous cases of encephalitis seen after the 1918 epidemic of influenza which culminated in the 1920–21 epidemic of encephalitis lethargica … sporadic encephalitis is known to occur in England and Wales every year whether or not there is an influenza epidemic ( Stuart-Harris 1965 , pp 52f). The pandemic disappeared in 1927, as abruptly and mysteriously as it first appeared. In 1918, a world war was raging, and a lethal strain of influenza was circling the globe. 1992 Jan-Feb;37(1):46-9 2014 Oct;61(2):189-95. doi: 10.1016/j.jcv.2014.07.013. The Spanish flu epidemic of 1918, the flapper era, the speakeasy and Prohibition, and the Stock Market Crash of 1929 all overshadowed the epidemic of encephalitis lethargica. [PMC free article] Ravenholt RT, Foege WH. Others believe that a virus related to the polio virus was the cause. It had a nonspecific prodromal phase, with influenza-like symptoms, and an acute phase, characterised by fever, sleepiness, ocular motility disturbances, and movement disorders. Post-encephalitic syndromes varied widely: sometimes they proceeded rapidly, leading to profound disability or death; sometimes very slowly; sometimes they progressed to a certain point and then stayed at this point for years or decades; and sometimes, following their initial onslaught, they remitted and disappeared. "[26], Modern treatment approaches to encephalitis lethargica include immunomodulating therapies, and treatments to remediate specific symptoms. Comment in J R Soc Med. Careers. One theory is that the co-occurrence of the encephalitis and the 1918 influenza pandemic was no coincidence, and that the influenza virus somehow affected the brain in some cases, causing encephalitis lethargica. 2018 Jun 28;4(1):3. doi: 10.1038/s41572-018-0002-y. [15], Some studies have explored its origins in an autoimmune response,[5] and, separately or in relation to an immune response, links to pathologies of infectious disease – viral and bacterial,[5] e.g., in the case of influenza, where a link with encephalitis is clear. Bantle CM, Phillips AT, Smeyne RJ, Rocha SM, Olson KE, Tjalkens RB. Just as WWI was drawing to a close, the Spanish Flu pandemic of 1918-19 struck. [citation needed], There have been several proposed diagnostic criteria for encephalitis lethargica. In the hardest hit societies, everything else was put aside in a bid to cope with its ravages. Zh Nevropatol Psikhiatr Im S S Korsakova. Prevention and treatment information (HHS), National Library of Medicine Dourmashkin RR(1). 1981;81(2):124-7. Director: Penny Marshall | Stars: Robert De Niro, Robin Williams, Julie Kavner, Ruth Nelson. Pathological studies revealed an encephalitis of the midbrain and basal ganglia, with … Letter from Oliver Sacks to Professor Joel A. Vilensky, 9 Sept 2012. [5][12] In severe cases, patients may enter a coma-like state (akinetic mutism). [10], No recurrence of the epidemic has since been reported, though isolated cases continue to occur. (Liner Notes/ Reference Guide for Abridged Audiobook of Titus Alone), Learn how and when to remove these template messages, Learn how and when to remove this template message, "Encephalitis Lethargica Syndrome: 20 New Cases and Evidence of Basal Ganglia Autoimmunity", "1918 Influenza, Encephalitis Lethargica, Parkinsonism", "The relationship between encephalitis lethargica and influenza: A critical analysis", "Encephalitis lethargica: 100 years after the epidemic", "Experimenting on the Past: The Enigma of von Economo's Encephalitis Lethargica", "The Relationship Between Encephalitis Lethargica and Influenza: A Critical Analysis", "Highly Pathogenic H5N1 Influenza Virus Can Enter the Central Nervous System and Induce Neuroinflammation and Neurodegeneration", Proceedings of the National Academy of Sciences, "Children and Encephalitis Lethargica: A Historical Review", "Evidence for an enterovirus as the cause of encephalitis lethargica", "Encephalitis Lethargica Information Page", "Review: "Asleep: the Forgotten Epidemic That Remains One of Medicine's Greatest Mysteries" [Molly Caldwell Crosby", "Dementia With Lewy Bodies and the Neurobehavioral Decline of Mervyn Peake", National Institute of Neurological Disorders and Stroke, Extranodal NK/T-cell lymphoma, nasal type, Progressive multifocal leukoencephalopathy, https://en.wikipedia.org/w/index.php?title=Encephalitis_lethargica&oldid=1017104804, Viral infections of the central nervous system, Short description is different from Wikidata, Articles needing expert attention from December 2015, Medicine articles needing expert attention, Articles needing additional medical references from December 2015, All articles needing additional references, Articles requiring reliable medical sources, Articles with multiple maintenance issues, Articles with unsourced statements from December 2015, Articles with unsourced statements from October 2020, Wikipedia articles in need of updating from December 2015, All Wikipedia articles in need of updating, Creative Commons Attribution-ShareAlike License, Economo's disease; von Economo's encephalitis, In 1580, Europe was swept by a serious febrile and lethargic illness, which led to, In 1673–1675, a similar serious epidemic occurred in. Infection with mosquito-borne alphavirus induces selective loss of dopaminergic neurons, neuroinflammation and widespread protein aggregation. Encephalitis lethargica: 500,000 1916 United States polio epidemic 1916 United States Poliomyelitis: 7,130 1918 influenza pandemic ('Spanish flu') 1918–1920 Worldwide: Influenza A virus subtype H1N1. -, Lancet. Victorino DB, Guimarães-Marques M, Nejm M, Scorza FA, Scorza CA. [24], The number of people infected during the ten years of the pandemic is unknown, but it is estimated that more than 1 million people contracted the disease, which directly caused more than 500,000 deaths. 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