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==Differentiating Japanese encephalitis from Other Diseases==
==Differentiating Japanese encephalitis from Other Diseases==
Japanese encephalitis must be differentiated from other diseases that cause [[fever]], [[headache]], and [[vomiting]], such as:<ref name=Mandell1> M.D. JE, Dolin R, Blaser MJ. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases, Expert Consult Premium Edition. Saunders; 2014.</ref><ref name="pmid14978145">{{cite journal| author=Kennedy PG| title=Viral encephalitis: causes, differential diagnosis, and management. | journal=J Neurol Neurosurg Psychiatry | year= 2004 | volume= 75 Suppl 1 | issue=  | pages= i10-5 | pmid=14978145 | doi= | pmc=PMC1765650 | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=14978145  }} </ref><ref name=NYDeptofHealth> Arboviral Infections (arthropod-borne encephalitis, eastern equine encephalitis, St. Louis encephalitis, California encephalitis, Powassan encephalitis, West Nile encephalitis). New York State Department of Health (2006). https://www.health.ny.gov/diseases/communicable/arboviral/fact_sheet.htm Accessed on February 23, 2016 </ref>
Japanese encephalitis must be differentiated from other diseases that cause [[fever]], [[headache]], and [[vomiting]], such as:<ref name=Mandell1> M.D. JE, Dolin R, Blaser MJ. Mandell, Douglas, and Bennett's Principles and Practice of Infectious Diseases, Expert Consult Premium Edition. Saunders; 2014.</ref><ref name="pmid14978145">{{cite journal| author=Kennedy PG| title=Viral encephalitis: causes, differential diagnosis, and management. | journal=J Neurol Neurosurg Psychiatry | year= 2004 | volume= 75 Suppl 1 | issue=  | pages= i10-5 | pmid=14978145 | doi= | pmc=PMC1765650 | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=14978145  }} </ref><ref name=NYDeptofHealth> Arboviral Infections (arthropod-borne encephalitis, eastern equine encephalitis, St. Louis encephalitis, California encephalitis, Powassan encephalitis, West Nile encephalitis). New York State Department of Health (2006). https://www.health.ny.gov/diseases/communicable/arboviral/fact_sheet.htm Accessed on February 23, 2016 </ref><ref name="pmid21932127">{{cite journal| author=Eckstein C, Saidha S, Levy M| title=A differential diagnosis of central nervous system demyelination: beyond multiple sclerosis. | journal=J Neurol | year= 2012 | volume= 259 | issue= 5 | pages= 801-16 | pmid=21932127 | doi=10.1007/s00415-011-6240-5 | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=21932127  }} </ref><ref name="pmid11260760">{{cite journal| author=De Kruijk JR, Twijnstra A, Leffers P| title=Diagnostic criteria and differential diagnosis of mild traumatic brain injury. | journal=Brain Inj | year= 2001 | volume= 15 | issue= 2 | pages= 99-106 | pmid=11260760 | doi=10.1080/026990501458335 | pmc= | url=http://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=11260760  }} </ref>


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{| style="border: 0px; font-size: 90%; margin: 3px;" align=center
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! style="background: #4479BA; width: 120px;" | {{fontcolor|#FFF|Disease}}
! style="background: #4479BA; width: 50px;" | {{fontcolor|#FFF|Disease}}
! style="background: #4479BA; width: 550px;" | {{fontcolor|#FFF|Findings}}
! style="background: #4479BA; width: 100px;" | {{fontcolor|#FFF|Similarities}}
! style="background: #4479BA; width: 150px;" | {{fontcolor|#FFF|Differentials}}
|-
|-
| style="padding: 5px 5px; background: #DCDCDC;" | '''[[West Nile encephalitis]]'''
| style="padding: 5px 5px; background: #DCDCDC;" | '''[[Meningitis]]'''
| style="padding: 5px 5px; background: #F5F5F5;" |[[West Nile encephalitis]] presents with acute [[inflammation]] of the [[brain]], caused by an [[arbovirus|arboviral infection]]; West Nile encephalitis may present with include [[fever]], [[nausea]], [[headache]], [[stiff neck]], [[photophobia]], [[seizure]]s, and [[coma]].
| style="padding: 5px 5px; background: #F5F5F5;" | Classic triad of [[fever]], [[nuchal rigidity]], and [[altered mental status]]
| style="padding: 5px 5px; background: #F5F5F5;" |[[Photophobia]], [[phonophobia]], [[rash]] associated with [[meningococcemia]], concomitant [[sinusitis]] or [[otitis]], swelling of the [[fontanelle]] in infants (0-6 months)
|-
|-
| style="padding: 5px 5px; background: #DCDCDC;" | '''[[St. Louis encephalitis]]'''
| style="padding: 5px 5px; background: #DCDCDC;" |'''[[Brain abscess]]'''
| style="padding: 5px 5px; background: #F5F5F5;" |[[St. Louis encephalitis]] presents with acute [[inflammation]] of the [[brain]], caused by an [[arbovirus|arboviral infection]]; St. Louis encephalitis may present with [[fever]], [[nausea]], [[headache]], [[malaise]], [[photophobia]], [[seizure]]s, and [[coma]].
| style="padding: 5px 5px; background: #F5F5F5;" | [[Fever]], [[headache]], [[hemiparesis]]
| style="padding: 5px 5px; background: #F5F5F5;" |Varies depending on the location of the abscess; clinically, [[visual disturbance]] including [[papilledema]], decreased [[sensation]]; on imaging, a [[lesion]] demonstrates both ring enhancement and central restricted diffusion
|-
|-
| style="padding: 5px 5px; background: #DCDCDC;" | '''[[Vector-borne encephalitis|Other Vector-Borne encephalitis]]'''
| style="padding: 5px 5px; background: #DCDCDC;" | '''[[Demyelinating disease]]s'''
| style="padding: 5px 5px; background: #F5F5F5;" |[[Vector-borne encephalitis]] presents with acute [[inflammation]] of the [[brain]], caused by a [[bacterial infection]] or [[arboviral]] infection; complications include severe [[brain]] damage as the inflamed [[brain]] pushes against the [[skull]], potentially leading to [[mortality]]. {{see also|Tick-borne encephalitis|California encephalitis virus|La Crosse encephalitis|Western equine encephalitis|Eastern equine encephalitis|Venezuelan equine encephalitis}}
| style="padding: 5px 5px; background: #F5F5F5;" | [[Ataxia]], [[lethargy]]
| style="padding: 5px 5px; background: #F5F5F5;" |[[Multiple sclerosis]]: clinically, [[nystagmus]], [[internuclear ophthalmoplegia]], [[Lhermitte's sign]]; on imaging, well-demarcated ovoid lesions with possible T1 hypointensities (“black holes”)
[[Acute disseminated encephalomyelitis]]: ; on imaging, diffuse or multi-lesion enhancement, with indistinct lesion borders
|-
|-
| style="padding: 5px 5px; background: #DCDCDC;" | '''[[Viral encephalitis]] '''
| style="padding: 5px 5px; background: #DCDCDC;" | '''[[Substance abuse]]'''
| style="padding: 5px 5px; background: #F5F5F5;" |[[Viral encephalitis]] presents with acute [[inflammation]] of the [[brain]], caused by a [[viral infection]]; complications include severe [[brain]] damage as the inflamed [[brain]] pushes against the [[skull]], potentially leading to [[mortality]]. {{see also|Herpes simplex encephalitis|VZV encephalitis}}
| style="padding: 5px 5px; background: #F5F5F5;" | [[Tremor]], [[headache]], [[altered mental status]]
| style="padding: 5px 5px; background: #F5F5F5;" |Varies depending on type of substance: prior history, drug-seeking behavior, attention-seeking behavior, [[paranoia]], sudden [[panic]], [[anxiety]], [[hallucination]]s
|-
|-
| style="padding: 5px 5px; background: #DCDCDC;" | '''[[Encephalopathy]]'''
| style="padding: 5px 5px; background: #DCDCDC;" | '''[[Electrolyte disturbance]]'''
| style="padding: 5px 5px; background: #F5F5F5;" |[[Encephalopathy]] presents with steady [[depression]], generalized [[seizures]]. Generally absent are [[fever]], [[headache]], [[leukocytosis]], and [[pleocytosis]]; [[MRI]] often appears normal.
| style="padding: 5px 5px; background: #F5F5F5;" | [[Fatigue]], [[headache]], [[nausea]]
| style="padding: 5px 5px; background: #F5F5F5;" |Varies depending on deficient ions; clinically, [[edema]], [[constipation]], [[hallucination]]s; on [[EKG]], abnormalities in [[T wave]], [[P wave]], [[QRS complex]]; possible presentations include [[arrhythmia]], [[dehydration]], [[renal failure]]
|-
|-
| style="padding: 5px 5px; background: #DCDCDC;" | '''[[Meningitis]]'''
| style="padding: 5px 5px; background: #DCDCDC;" | '''[[Stroke]]'''
| style="padding: 5px 5px; background: #F5F5F5;" |[[Meningitis]] presents with [[headache]], [[altered mental status]], and [[inflammation]] of the [[meninges]], which may develop in the setting of an [[infection]], physical injury, [[cancer]], or certain drugs; it may have an indolent evolution, resolving on its own, or may present as an rapidly evolving [[inflammation]], causing neurologic damage and possible [[mortality]]. {{see also|Bacterial meningitis|Viral meningitis|Fungal meningitis}}
| style="padding: 5px 5px; background: #F5F5F5;" | [[Ataxia]], [[aphasia]], [[dizziness]]
| style="padding: 5px 5px; background: #F5F5F5;" |Varies depending on classification of stroke; presents with positional [[vertigo]], high [[blood pressure]], [[extremities|extremity]] weakness
|-
|-
| style="padding: 5px 5px; background: #DCDCDC;" |'''[[Malaria]]'''
| style="padding: 5px 5px; background: #DCDCDC;" | '''[[Intracranial hemorrhage]]'''
| style="padding: 5px 5px; background: #F5F5F5;" |[[Malaria]] presents with a [[fever]], which commonly occurs in paroxysms, separated by fever-free time intervals. Other symptoms include [[chills]], [[headache]], [[nausea]], [[vomiting]], and [[weakness]].
| style="padding: 5px 5px; background: #F5F5F5;" | [[Headache]], [[coma]], [[dizziness]]
| style="padding: 5px 5px; background: #F5F5F5;" | Lobar [[hemorrhage]], [[numbness]], [[tingling]], [[hypertension]], [[hemorrhagic diathesis]]
|-
|-
| style="padding: 5px 5px; background: #DCDCDC;" | '''[[Primary central nervous system lymphoma]]'''
| style="padding: 5px 5px; background: #DCDCDC;" | '''[[Trauma]]'''
| style="padding: 5px 5px; background: #F5F5F5;" |[[Primary central nervous system lymphoma]] presents with [[headache]], [[nausea]], [[vision loss|monocular vision loss]], [[myalgia]], and [[seizure]]s.
| style="padding: 5px 5px; background: #F5F5F5;" | [[Headache]], [[altered mental status]]
| style="padding: 5px 5px; background: #F5F5F5;" | [[Amnesia]], [[loss of consciousness]], [[dizziness]], [[concussion]], [[contusion]]
|-
|-
|}
|}

Revision as of 15:10, 28 April 2016

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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

Japanese encephalitis must be differentiated from other diseases that cause nondescript symptoms, which include fever, headache, and vomiting, such as other vector-borne encephalitis diseases, malaria, and primary central nervous system lymphoma.

Differentiating Japanese encephalitis from Other Diseases

Japanese encephalitis must be differentiated from other diseases that cause fever, headache, and vomiting, such as:[1][2][3][4][5]

Disease Similarities Differentials
Meningitis Classic triad of fever, nuchal rigidity, and altered mental status Photophobia, phonophobia, rash associated with meningococcemia, concomitant sinusitis or otitis, swelling of the fontanelle in infants (0-6 months)
Brain abscess Fever, headache, hemiparesis Varies depending on the location of the abscess; clinically, visual disturbance including papilledema, decreased sensation; on imaging, a lesion demonstrates both ring enhancement and central restricted diffusion
Demyelinating diseases Ataxia, lethargy Multiple sclerosis: clinically, nystagmus, internuclear ophthalmoplegia, Lhermitte's sign; on imaging, well-demarcated ovoid lesions with possible T1 hypointensities (“black holes”)

Acute disseminated encephalomyelitis: ; on imaging, diffuse or multi-lesion enhancement, with indistinct lesion borders

Substance abuse Tremor, headache, altered mental status Varies depending on type of substance: prior history, drug-seeking behavior, attention-seeking behavior, paranoia, sudden panic, anxiety, hallucinations
Electrolyte disturbance Fatigue, headache, nausea Varies depending on deficient ions; clinically, edema, constipation, hallucinations; on EKG, abnormalities in T wave, P wave, QRS complex; possible presentations include arrhythmia, dehydration, renal failure
Stroke Ataxia, aphasia, dizziness Varies depending on classification of stroke; presents with positional vertigo, high blood pressure, extremity weakness
Intracranial hemorrhage Headache, coma, dizziness Lobar hemorrhage, numbness, tingling, hypertension, hemorrhagic diathesis
Trauma Headache, altered mental status Amnesia, loss of consciousness, dizziness, concussion, contusion

References

  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. ↑ Kennedy PG (2004). "Viral encephalitis: causes, differential diagnosis, and management". J Neurol Neurosurg Psychiatry. 75 Suppl 1: i10–5. PMC 1765650. PMID 14978145.
  3. ↑ Arboviral Infections (arthropod-borne encephalitis, eastern equine encephalitis, St. Louis encephalitis, California encephalitis, Powassan encephalitis, West Nile encephalitis). New York State Department of Health (2006). https://www.health.ny.gov/diseases/communicable/arboviral/fact_sheet.htm Accessed on February 23, 2016
  4. ↑ Eckstein C, Saidha S, Levy M (2012). "A differential diagnosis of central nervous system demyelination: beyond multiple sclerosis". J Neurol. 259 (5): 801–16. doi:10.1007/s00415-011-6240-5. PMID 21932127.
  5. ↑ De Kruijk JR, Twijnstra A, Leffers P (2001). "Diagnostic criteria and differential diagnosis of mild traumatic brain injury". Brain Inj. 15 (2): 99–106. doi:10.1080/026990501458335. PMID 11260760.


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