title: Involvement of the central nervous system in patients with dengue virus infection.
abstract: The findings of a neurological evaluation in 85 patients with confirmed, acute, dengue virus infection are described. Signs of central nervous system involvement were present in 18 patients (21.2%). The most frequent neurological symptom was mental confusion. The frequency of neurological involvement did not differ between patients with primary and secondary dengue infection, and the prevalence of central nervous system involvement in dengue fever and dengue hemorrhagic fever also did not differ significantly. The presence of CNS involvement did not influence the prognosis of dengue infection. Dengue viral CSF RNA was found in 7 of 13 patients submitted to a spinal tap, the CSF viral load being less than 1000 copies/ml. PCR was negative in serum samples obtained from three patients on the same day as the CSF samples, suggesting that the dengue virus actively enters the CNS and that the presence of the virus in the CNS does not result from passive crossing of the blood-brain barrier.
authors.affiliation: Department of Pathology, Escola Superior de Ciências da Saúde de Vitória (EMESCAM), Vitória, Brazil. renan-domingues@uol.com.br
authors.forename: Renan B
authors.initials: RB
authors.lastname: Domingues
authors.forename: Gustavo W
authors.initials: GW
authors.lastname: Kuster
authors.forename: Fábio L
authors.initials: FL
authors.lastname: Onuki-Castro
authors.forename: Vanda A
authors.initials: VA
authors.lastname: Souza
authors.forename: José E
authors.initials: JE
authors.lastname: Levi
authors.forename: Cláudio S
authors.initials: CS
authors.lastname: Pannuti
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D001812:Blood-Brain Barrier / Q000503:physiopathology / Q000821:virology; D001938:Brazil / Q000453:epidemiology; D002490:Central Nervous System / Q000503:physiopathology* / Q000821:virology*; D015897:Comorbidity; D003715:Dengue / Q000453:epidemiology*; D003716:Dengue Virus / Q000235:genetics; D018792:Encephalitis, Viral / Q000175:diagnosis / Q000453:epidemiology* / Q000503:physiopathology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D016133:Polymerase Chain Reaction; D015995:Prevalence; D012367:RNA, Viral / Q000097:blood / Q000134:cerebrospinal fluid; D019595:Severe Dengue / Q000453:epidemiology; D019562:Viral Load
chemical_list: D012367:RNA, Viral