Evaluation of intrathecal synthesis of specific IgG antibodies against Toxoplasma gondii in the diagnosis assessment of presumptive toxoplasma encephalitis in aids patients

Revista da Sociedade Brasileira de Medicina Tropical

Aercio Sebastião Borges²  José Fernando De Castro Figueiredo¹ 

[1] ,Universidade Federal de Uberlândia Faculdade de Medicina Centro de Ciências BiomédicasUberlândia MG ,Brasil

关键词: AIDS;    Neurotoxoplasmosis;    Antibody synthesis;    Central nervous system;    SIDA;    Neurotoxoplasmose;    Síntese de anticorpos;    Sistema Nerevoso Central;   

DOI  :  10.1590/S0037-86822004000600010

来源: SciELO

【 摘 要 】

The diagnosis of neurotoxoplasmosis in patients with acquired immunodeficiency syndrome is mainly based on tomographic or magnetic resonance findings and on the response to specific treatment. We studied 55 patients with AIDS and neurotoxoplasmosis according to these diagnostic criteria (group 1), 37 patients with AIDS and neurological involvement of other etiology (group 2), and 16 anti-HIV-negative individuals with neurological manifestations (group 3). Serum and cerebrospinal fluid were examined for the presence of anti-T. gondii IgG, by indirect immunofluorescence. In 72 of them, the total amounts of these antibodies were determined in order to assess local production of anti-T. gondii antibodies in the central nervous system and to correlate their titers with infection activity in patients with AIDS and neurotoxoplasmosis. IgG titers > 1/64 in cerebrospinal fluid reached 100% specificity for the diagnosis of neurotoxoplasmosis in AIDS. Evidence of local synthesis of these antibodies was detected in 42.8% of patients of group 1, in 29.1% of patients of group 2 and in no patient of group 3. The test showed 70.8% specificity and therefore was not useful in our study for the differential diagnosis of neurotoxoplasmosis in patients with AIDS.

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