ABSTRACT
This study showed that laboratory markers of recent infection by dengue, Zika or chikungunya arboviruses were detected in the biological samples of approximately one-third of patients with encephalitis, myelitis, encephalomyelitis or Guillain-Barré syndrome, in a surveillance programme in Piauí state, Brazil, between 2015-2016. Fever and myalgia had been associated with these cases. Since in non-tropical countries most infections or parainfectious diseases associated with the nervous system are attributed to herpesviruses, enteroviruses, and Campylobacter jejuni, the present findings indicate that in tropical countries, arboviruses may now play a more important role and reinforce the need for their surveillance and systematic investigation in the tropics.
Subject(s)
Humans , Chikungunya virus/genetics , Chikungunya virus/immunology , Dengue Virus/genetics , Dengue Virus/immunology , Zika Virus/genetics , Zika Virus/immunology , Acute Disease , Reverse Transcriptase Polymerase Chain Reaction , Guillain-Barre Syndrome/diagnosis , Guillain-Barre Syndrome/virology , Encephalitis/diagnosis , Encephalitis/virology , Encephalomyelitis, Acute Disseminated/diagnosis , Encephalomyelitis, Acute Disseminated/virology , Enzyme-Linked Immunospot Assay , Myelitis, Transverse/diagnosis , Myelitis, Transverse/virology , Nervous System Diseases/diagnosis , Nervous System Diseases/virologyABSTRACT
OBJETIVO: descrever a ocorrência e as características dos casos de microcefalia no Piauí, Brasil, durante epidemia do vírus Zika em 2015-2016. MÉTODOS: estudo descritivo com dados dos nascidos vivos no período de janeiro/2015 a janeiro/2016, obtidos do Sistema de Informações sobre Nascidos Vivos (Sinasc), do Registro de Eventos em Saúde Pública (RESP) e de busca ativa em prontuários; mães e nascidos vivos foram testados para dengue, chikungunya e Zika, além de sífilis, toxoplasmose, rubéola, citomegalovírus e herpes (STORCH). RESULTADOS: dos 75 casos de microcefalia, 34 foram relacionados a processo infeccioso congênito; a prevalência de microcefalia foi de 13,6/10 mil nascidos vivos; exames de imagem confirmaram que 34 nascidos vivos apresentavam calcificações, 23 atrofias cerebrais, 14 lisencefalia, 12 ventriculomegalia e 6 digenesias; nenhum apresentou resultado positivo para STORCH, dengue ou chikungunya; 1 referiu Zika IgM reagente. CONCLUSÃO: houve surto de microcefalia no Piauí, possivelmente relacionado à infecção gestacional pelo vírus Zika.
OBJETIVO: describir la ocurrencia y las características de los casos de microcefalia en Piauí, Brasil, durante la epidemia de infección por virus Zika en 2015-2016. MÉTODOS: Estudio descriptivo incluyendo datos del Sistema de Información de Nacidos Vivos (Sinasc) y del Registro de Eventos en Salud Pública (RESP), entre enero/2015 y enero/2016; las madres fueron testadas para dengue, chikungunya, zika y STORCH. RESULTADOS: 75 recién nacidos (RN) presentaron microcefalias; de estos, 34 tenían microcefalia relacionada con una infección; la prevalencia de microcefalia fue de 13,6 casos/10.000 nacidos vivos; imágenes confirmaron que 34 RN presentaron calcificaciones, 23 atrofia cerebral, 14 lisencefalias, 12 ventriculomegalias y 6 disgenesias; ningún RN presentó STORCH, dengue o chikungunya, y 1 fue reactivo para Zika (IgM). CONCLUSIÓN: hubo un brote de microcefalia en Piauí posiblemente relacionado con infección materna previa por virus Zika.
OBJECTIVE: to describe the occurrence and characteristics of microcephaly cases in Piauí, Brazil, during an epidemic of Zika virus infection in 2015-2016. METHODS: descriptive study using data of live births from January/2015 to January/2016, obtained from the Information System on Live Births (Sinasc), the Public Health Events Registry (RESP) and the active search for medical records; mothers and live births were tested for dengue, chikungunya, and Zika, besides syphilis, toxoplasmosis, rubella, cytomegalovirus, and herpes (STORCH). RESULTS: of the 75 microcephaly cases, 34 were related to congenital infectious process; microcephaly prevalence was of 13.6/10 thousand live births; imaging exams confirmed that 34 live births presented calcifications, 23 had cerebral atrophies, 14 had lissencephaly, 12 had ventriculomegaly and 6 had dysgenesis; none tested positive for STORCH, dengue or chikungunya; 1 was IgM positive for Zika. CONCLUSION: there was an outbreak of microcephaly in Piauí, possibly related to infection during pregnancy Zika virus.