Japanese encephalitis history and symptoms

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Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]; Associate Editor(s)-in-Chief:  Anthony Gallo, B.S. [2]

## Overview

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Most patients infected with Japanese encephalitis remain asymptomatic; 1% of infected individuals develop clinical disease. The incubation period for Japanese encephalitis is usually 5-15 days. Common symptoms of Japanese encephalitis include fever, headache, and vomiting.

## History and Symptoms

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### History and Symptoms

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If possible, a detailed and thorough history from the patient is necessary. Most patients infected with Japanese encephalitis remain asymptomatic; 1% of infected individuals develop clinical disease. The incubation period for Japanese encephalitis is usually 5-15 days. Common symptoms of Japanese encephalitis include:[1][2][3][4]

* Fever
* Chills
* Headache
* Fatigue
* Muscle pain
* Dizziness
* Altered mental status
* Vomiting
* Weakness
* Neck stiffness

## References

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1. ↑ M.D. JE, Dolin R, Blaser MJ. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases, Expert Consult Premium Edition. Saunders; 2014.
2. ↑ Japanese Encephalitis, Clinical and Laboratory Evaluation. Centers for Disease Control and Prevention (2015). http://www.cdc.gov/japaneseencephalitis/healthcareproviders/healthcareproviders-clinlabeval.html Accessed on April 14, 2016.
3. ↑ Centers for Disease Control and Prevention (CDC) (2012). "Expanding poliomyelitis and measles surveillance networks to establish surveillance for acute meningitis and encephalitis syndromes--Bangladesh, China, and India, 2006-2008". MMWR Morb Mortal Wkly Rep. 61 (49): 1008–11. PMID 23235298.
4. ↑ Chansamouth V, Thammasack S, Phetsouvanh R, Keoluangkot V, Moore CE, Blacksell SD; et al. (2016). "The Aetiologies and Impact of Fever in Pregnant Inpatients in Vientiane, Laos". PLoS Negl Trop Dis. 10 (4): e0004577. doi:10.1371/journal.pntd.0004577. PMID 27050192.CS1 maint: Explicit use of et al. (link) CS1 maint: Multiple names: authors list (link)

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