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Toxoplasma-SPECIFIC IgG SUBCLASS ANTIBODY RESPONSE IN CEREBROSPINAL FLUID SAMPLES FROM PATIENTS WITH CEREBRAL TOXOPLASMOSIS
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Toxoplasma-SPECIFIC IgG SUBCLASS ANTIBODY RESPONSE IN CEREBROSPINAL FLUID SAMPLES FROM PATIENTS WITH CEREBRAL TOXOPLASMOSIS
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Journal Article
Toxoplasma-SPECIFIC IgG SUBCLASS ANTIBODY RESPONSE IN CEREBROSPINAL FLUID SAMPLES FROM PATIENTS WITH CEREBRAL TOXOPLASMOSIS
2015
Overview
SUMMARY Cerebral toxoplasmosis can be highly debilitating and occasionally fatal in persons with immune system deficiencies. In this study, we evaluated the Toxoplasma gondii-specific IgG subclass antibody response in 19 cerebrospinal fluid (CSF) samples from patients with cerebral toxoplasmosis who had a positive IgG anti-T. gondii ELISA standardized with a cyst antigen preparation. There were no significant differences between the rates of positivity and the antibody concentrations (arithmetic means of the ELISA absorbances, MEA) for IgG1 and IgG2, but the rates of positivity and MEA values for these two IgG subclasses were significantly higher than those for IgG3 and IgG4. The marked IgG2 response in CSF from patients with cerebral toxoplasmosis merits further investigation. RESUMO A toxoplasmose cerebral pode ser altamente debilitante e ocasionalmente fatal em pessoas com deficiências do sistema imune. Nesse estudo, nós avaliamos a resposta de anticorpos das subclasses da IgG para o Toxoplasma gondii em 19 amostras de líquido cefalorraquidiano (LCR) de pacientes com toxoplasmose cerebral que apresentavam uma reação IgG anti-T. gondii positiva com ELISA padronizada com uma preparação antigênica de cistos. Não foram encontradas diferenças significativas entre as taxas de positividade e as concentrações de anticorpos (média aritmética das absorbâncias das reações ELISA, MEA) para IgG1 e IgG2, mas as taxas de positividade e valores MEA para estas duas subclasses de IgG foram significativamente superiores aos da IgG3 e IgG4. A resposta marcante de anticorpos IgG2 em LCR de pacientes com toxoplasmose cerebral merece investigação adicional.
Publisher
Instituto de Medicina Tropical de Sao Paulo,Instituto de Medicina Tropical,Universidade de São Paulo (USP)
