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1.
Arq. neuropsiquiatr ; 78(3): 163-168, Mar. 2020. tab
Article in English | LILACS | ID: biblio-1098075

ABSTRACT

Abstract Herpes simplex virus (HSV) is a cause of a severe disease of the central nervous system (CNS) in humans. The demonstration of specific antibodies in the cerebrospinal fluid (CSF) may contribute to the retrospective neurological diagnosis. However, the commercial immunological tests for HSV infection are for use in serum samples. Objective: The aim of the present study was to adapt a commercial kit anti-HSV IgG used for serum samples to be performed with a CSF sample. Methods: Forty CSF specimens from 38 patients with suspected CNS HSV infection were serially diluted for detecting anti-HSV IgG by enzyme immunoassay (EIA). The same samples were also analyzed with the polymerase chain reaction (PCR). Results: The sensitivity of EIA test for HSV was 5% (dilution 1:40) and 65% (dilution 1:2) in CSF, and HSV DNA PCR was 15%. The combined analysis of EIA (dilution 1:2) and PCR increased the sensitivity up to 72.5%. The inflammatory CSF was associated with positive HSV PCR. Conclusions: We demonstrated the importance to adapt serological anti-HSV IgG EIA test for CSF assays to increase the accuracy of the analysis, considering the low concentration of specific antibodies in CSF.


Resumo O vírus herpes simples (HSV) é um dos agentes causadores de uma doença grave no sistema nervoso central (SNC) em humanos. A detecção de anticorpos específicos no líquido cefalorraquidiano (LCR) pode contribuir para o diagnóstico neurológico retrospectivo. Entretanto, os testes imunológicos comerciais são para uso em amostras de soro. Objetivo: Adaptar um kit comercial sorológico anti-HSV IgG para ser utilizado no de LCR. Metodos: Quarenta amostras de LCR de 38 pacientes com suspeita de infecção por HSV no SNC foram diluídas pesquisa de anticorpos anti-HSV IgG pelo método imunoenzimático (EIA). Além disso, as mesmas amostras também foram analisadas por reação em cadeia da polimerase (PCR). Resultados: A sensibilidade do teste EIA para o HSV consistiu em 5% (diluição 1:40) e 65% (diluição 1:2) no LCR, e o PCR do DNA do HSV, 15%. A análise combinada de EIA (diluição 1:2) e PCR aumentou a sensibilidade para 72,5%. Houve associação entre presença do LCR inflamatório e PCR positiva para HSV. Conclusões: Demonstramos a importância na adaptação previa do teste sorológico anti-HSV IgG EIA para ensaios do no LCR, a fim de aumentar a acuracia da análise, considerando a baixa concentração de anticorpos específicos no LCR.


Subject(s)
Humans , Male , Female , Adult , Middle Aged , Cerebrospinal Fluid/virology , Simplexvirus/isolation & purification , Herpes Simplex/diagnosis , Herpes Simplex/virology , Antibodies, Viral/cerebrospinal fluid , Viral Proteins , DNA, Viral/genetics , Polymerase Chain Reaction/methods , Retrospective Studies , Simplexvirus/genetics , DNA-Directed DNA Polymerase/genetics , Exodeoxyribonucleases , Herpes Simplex/cerebrospinal fluid , Nervous System
2.
Article in Spanish | LILACS | ID: lil-505283

ABSTRACT

Se hace un estudio mediante técnicas inmunoelectromicroscópicas en cerebros de cuatro ratas descendientes de padres inoculados intracerebralmente con el líquido cefalorraquídeo (LCR) de una paciente esquizofrénica hebefrénica, comparando sus resultados con un estudio en ratas controles. En un estudio anterior se habían encontrado alteraciones compatibles con la etiología por el herpes simplex hominis tipo I (HSV-1) en el cerebro de adultos esquizofrénicos, en fetos abortados utilizando la misma técnica de investigación, así como en embriones de pollo inoculados con LCR de pacientes esquizofrénicos. Los resultados obtenidos hasta el momento en este estudio pueden constituir un elemento más en favor de la transmisión de tipo vertical planteada para la enfermedad, así como su relación con el virus HSV-1. Estudios recientes en sueros obtenidos durante el embarazo de madres cuyos hijos padecieron esquizofrenia orientan hacia una etiología viral de la enfermedad y constituyen un elemento confirmatorio de la teoría del neurodesarrollo sobre la adquisición de la enfermedad antes del nacimiento por factores ambientales en el segundo trimestre de embarazo donde el herpes simplex se encuentra entre los candidatos más importantes.


A study is made by means of immuno-electron microscopic techniques in brains of four descending rats of parents inoculated intra-cerebrally with the cerebrospinal fluid (CSF) of a hebephrenic schizophrenic patient comparing its results with a study in control rats. In a previous study we have found alterations compatible with herpes simplex hominis type I (HSV1) virus etiology in the brain of schizophrenic adults, in aborted fetuses using the same research technique, as well as in chicken embryos inoculated with CSF from schizophrenic patients. The results obtained up to present in this study can constitute a further element favoring the vertical type transmission outlined for the illness as their relationship with HSV-1. Recent studies in serums obtained during pregnancy of mothers whose adult offspring suffered schizophrenia guide toward a viral etiology of the illness and they constitute a confirmatory element of the neurodevelopment theory about the acquisition of the illness before the birth due to environmental factors during the second pregnancy trimester where herpes simplex are among the most important candidates.


Subject(s)
Animals , Rats , Schizophrenia/etiology , Herpes Simplex/cerebrospinal fluid
3.
Rev. invest. clín ; 48(1): 35-41, ene.-feb. 1996. tab, ilus
Article in Spanish | LILACS | ID: lil-180636

ABSTRACT

El propósito de este reporte es presentar el caso de un recién nacido con infección por virus de herpes simple tipo 2 en sistema nervioso central. El diagnóstico se sospechó por las manifestaciones clínicas de la paciente y se confirmó por cultivo y detección de DNA de VHS en el líquido cefalorraquídeo. Se presentan conceptos actuales en cuanto a patogénesis, diagnóstico y tratamiento de esta infección viral en el período neonatal


Subject(s)
Humans , Female , Pregnancy , Infant, Newborn , Encephalitis, Viral/complications , Encephalitis, Viral/diagnosis , Encephalitis, Viral/etiology , Encephalitis, Viral/physiopathology , Herpes Simplex/cerebrospinal fluid , Herpes Simplex/transmission , Infectious Disease Transmission, Vertical , Pregnancy Complications, Infectious/virology
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