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1.
J. bras. patol. med. lab ; 48(6): 409-414, dez. 2012. ilus, tab
Article in Portuguese | LILACS | ID: lil-666028

ABSTRACT

INTRODUÇÃO: A utilidade da detecção de anticorpos da imunoglobulina da classe M (IgM) no diagnóstico da sífilis tem sido discutida há tempos. OBJETIVO: No presente estudo foi analisada a ocorrência de anticorpo IgM anti-T. pallidum (Tp-IgMAc) nas amostras de pacientes com sífilis recente, na fase de soroconversão e no monitoramento da resposta sorológica pós-tratamento. MÉTODOS: Amostras séricas de 11 indivíduos. RESULTADOS: Na soroconversão, o Tp-IgMAc foi detectado nas amostras de 10 indivíduos, e em um paciente a reatividade IgM ocorreu anteriormente ao Venereal Disease Research Laboratory (VDRL). A sororreversão foi evidenciada nas amostras de três pacientes com sífilis secundária tratada, e em um indivíduo com reinfecção. CONCLUSÃO: A detecção de Tp-IgMAc mostrou ser um potencial marcador diagnóstico de sífilis ativa e o desempenho do ensaio imunoenzimático de captura de IgM (ELISA-IgM) para o monitoramento pós-tratamento foi similar ao da VDRL.


INTRODUCTION: The appropriateness of IgM antibody detection in the diagnosis of syphilis has been extensively discussed. OBJECTIVE: This study aimed at assessing the detection of anti-T. pallidum IgM antibody (TP-IgMAb) in serum samples from patients with recent syphilis in seroconversion and in the monitoring of post-treatment serological response. METHODS: Serum samples from 11 individuals. RESULTS: At seroconversion, positive Tp-IgMAb was detected in 10 samples and IgM reactivity previous to Venereal Disease Research Laboratory (VDRL) was detected in one sample. Seroreversion was found in samples from three treated patients with secondary syphilis and in one individual with reinfection. CONCLUSION: Tp-IgMAb detection proved to be a potential diagnostic marker for active syphilis, and IgM capture enzyme linked immunosorbent assay (ELISA-IgM) performance was similar to VDRL in post-treatment monitoring.

2.
Rev. Inst. Med. Trop. Säo Paulo ; 45(6): 319-322, Nov.-Dec. 2003. tab
Article in English | LILACS | ID: lil-353982

ABSTRACT

A rapid test based on an immunochromatography assay - DetermineÕ Syphilis TP (Abbott Lab.) for detecting specific antibodies to Treponema pallidum was evaluated against serum samples from patients with clinical, epidemiological and serological diagnosis of syphilis, patients with sexually transmitted disease other than syphilis, and individuals with negative serology for syphilis. The DetermineÕ test presented the sensitivity of 93.6 percent, specificity of 92.5 percent, and positive predictive value and negative predictive value of 95.2 percent and 93.7 percent, respectively. One serum sample from patient with recent latent syphilis showed a prozone reaction. DetermineÕ is a rapid assay, highly specific and easy to perform. This technique obviates the need of equipment and its diagnostic features demonstrate that it may be applicable as an alternative assay for syphilis screening under some emergency conditions or for patients living in remote localities.


Subject(s)
Humans , Antibodies, Bacterial , Chromatography , Immunologic Tests , Syphilis , Treponema pallidum , Evaluation Study , Predictive Value of Tests , Reagent Kits, Diagnostic , Sensitivity and Specificity , Time Factors
3.
J. bras. patol ; 36(3): 161-5, jul.-set. 2000. ilus, tab
Article in Portuguese | LILACS | ID: lil-275803

ABSTRACT

A sífilis ainda é um problema de saúde pública, apesar dos esforços empreendidos para a sua prevençäo e a existência de tratamento eficiente. Os testes sorológicos säo fundamentais para o diagnóstico da doença. O presente trabalho descreve um novo teste de immunoblot )IB-rTp), utilizando três antígenos recombinantes de Treponema pallidum (GST-rTp47, GST-rTp17 e GST-rTp15), além da glutathiona S-tranferase (GST) purificada. FOram testadas 114 amostras séricas (53 de pacientes com sífilis, 50 de indivíduos sadios e 11 de pacientes com outras doenças) verificou-se concordância de 100 por cento em o IB-rTp e os testes treponêmicos convencionais, que utilizam antígeno nativo. A reatividade, quando presente, foi especificada contra a fraçäo treponêmica de cada proteína de fusäo. O teste IB-rTp apresentou alta especificidade; é de fácil execuçäo, näo requerendo absorçäo prévia do soro, sendo de utilidade como teste confirmatório de sífilis


Subject(s)
Antigens, Bacterial/immunology , Syphilis Serodiagnosis , Treponema pallidum/immunology , Immunoenzyme Techniques , Recombinant Proteins
4.
Rev. Inst. Med. Trop. Säo Paulo ; 41(2): 115-8, mar.-abr. 1999. tab
Article in English | LILACS | ID: lil-236053

ABSTRACT

Os antigenos recombinantes de Treponema pallidum GST-rTp47, GST-rTp17 e GST-rTp15, produzidos em fusao com glutationa S-transferase (GST) em E. coli, foram analisados quanto ao potencial diagnostico da sifilis pela tecnica de Western blotting. Foram testadas 53 amostras, sendo 25 pacientes em diferentes estagios clinicos da sifilis, com resultados positivos no teste treponemico classico; 25 amostras procedentes de doadores de banco de sangue, com sorologia negativa e 3 de pacientes com doenca sexualmente transmissivel nao relacionado a sifilis. Todas as amostras de pacientes com sifilis apresentaram alta reatividade com o antigeno GST-rTp17...


Subject(s)
Humans , Blotting, Western , Syphilis/diagnosis , Treponema pallidum/immunology , Blood Donors , Electrophoresis, Polyacrylamide Gel , Recombinant Proteins/immunology , Reference Standards , Sensitivity and Specificity , Immunologic Tests/methods
5.
Arq. neuropsiquiatr ; 55(1): 8-11, mar. 1997. ilus
Article in English | LILACS | ID: lil-194696

ABSTRACT

The detection of IgE is technically difficult because of its reduced concentrations in serum, and even lower concentrations in cerebrospinal fluid (CSF). In the present investigation we studied 86 CSF samples using animmunoenzymatic method with an anti-IgE-alkaline phosphatase conjugate and a fluorigenic substrate. The samples were from three groups: A) 29 patients with neurocysticercosis (NC), B) 36 patients with different neurologic disorders (neurosyphilis, neurotuberculosis, meningitis, tumors, hemorrhage) and C) 21 discharged individuals who had been hospitalized for bacterial meningitis. The results obtained were: A) 0.05 to 3.00 IU/ml (0.76 + 0.79), B) 0.00 to 1.50 IU/ml (0.23 + 0.34) and C) 0.05 to 1.25 IU/ml (0.34 + 0.34). The present results suggest that IgE appears to play a role in the pathogeny of NC and that efforts should be made to standardize a test for the detection of specific IgE antibodies.


Subject(s)
Humans , Central Nervous System Diseases/cerebrospinal fluid , Central Nervous System Diseases/immunology , Cysticercosis/cerebrospinal fluid , Cysticercosis/immunology , Immunoglobulin E/cerebrospinal fluid , Immunoenzyme Techniques
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