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1.
Arq. neuropsiquiatr ; 71(8): 512-515, ago. 2013. tab
Article in English | LILACS | ID: lil-684086

ABSTRACT

The "hygiene hypothesis" postulates an inverse relationship between the prevalence of parasitic infections and the frequency of multiple sclerosis (MS). Objective: It was to study whether antibodies against parasites could be demonstrated more frequently in blood serum from MS patients with oligoclonal bands (OCB) than from MS patients without OCB. Methods: We studied serum samples from 164 patients who had previously been analyzed to investigate OCB. Parasitic antibodies were studied through unidimensional electrophoresis of proteins on polyacrylamide gel against Taenia antigens, searching for antiparasitic specific low molecular weight antibodies and also for antiparasitic nonspecific high molecular weight antibodies. Results: Two of the 103 patients with no evidence of OCB had antibodies of low molecular weight and 59 of them had antibodies of high molecular weight. Of the 61 patients with evidence of OCB, one showed antibodies of low molecular weight and 16 showed antibodies of high molecular weight. Conclusion: Antiparasitic antibodies are detected with similar frequency in MS patients with OCB and in MS patients without OCB.


A "hipótese da higiene" postula haver relação inversamente proporcional entre a prevalência de infecções por parasitas e a frequência da esclerose múltipla (EM). Objetivo: Foi verificar se em pacientes com EM aparecem anticorpos antiparasitários mais frequentemente no grupo com bandas oligoclonais (BOC) do que no grupo sem BOC. Métodos: Foram estudadas amostras de sangue de 164 pacientes previamente analisadas para investigar BOC. Foi feita eletroforese unidimensional de proteínas em gel de poliacrilamida contra antígenos de Taenia para pesquisa de anticorpos específicos de baixo peso molecular e também de anticorpos inespecíficos de alto peso molecular. Resultados: Dois dos 103 pacientes em que não havia BOC apresentaram anticorpos de baixo peso molecular, e 59 apresentaram anticorpos de alto peso molecular. Dos 61 pacientes em que não havia BOC, um apresentou anticorpos de baixo peso molecular e 16, anticorpos de alto peso molecular. Conclusão: Anticorpos antiparasitários foram detectados com frequência semelhante em doentes com EM independentemente da presença ou não de BOC.


Subject(s)
Animals , Humans , Antibodies, Helminth/blood , Antigens, Helminth/blood , Multiple Sclerosis/cerebrospinal fluid , Oligoclonal Bands/cerebrospinal fluid , Taenia solium/immunology , Antibodies, Helminth/chemistry , Electrophoresis, Polyacrylamide Gel , Molecular Weight
2.
Rev. Soc. Bras. Med. Trop ; 44(3): 339-343, May-June 2011. tab
Article in English | LILACS | ID: lil-593363

ABSTRACT

INTRODUCTION: Human serofrequency of antibodies against Taenia solium antigens was determined and risk factors for cysticercosis transmission were identified. METHODS: Individuals (n=878) from periurban and rural locations of Lages, SC, were interviewed to gather demographic, sanitary and health information. Interviews and blood sample collections by finger prick on Whatman filter paper were performed from August 2004 to May 2005. Observation determined that 850 samples were suitable for analysis and were tested by ELISA using vesicular fluid of Taenia crassiceps heterologous antigen. To ensure the reliability of the results, 77 samples of the dried blood were matched with sera. The reactive samples were submitted to a serum confirmatory immunoblot (IB) test using purified Taenia crassiceps glycoproteins. RESULTS: The ELISA results for the dried blood and serum samples were statistically consistent. ELISA was positive in 186 (21.9 percent) out of 850 individuals. A group of 213 individuals were asked to collect vein blood for IB (186 with positive result in ELISA and 27 with inappropriate whole blood samples) and 130 attended the request. The IB was positive in 29 (3.4 percent) out of 850 individuals. A significant correlation (p = 0.0364) was determined among individuals who tested positive in the IB assay who practiced both pig rearing and kitchen gardening. CONCLUSIONS: ELISA with dried blood eluted from filter paper was suitable for cysticercosis population surveys. In Lages, human infection was associated with pig rearing and kitchen gardening. The prevalence index was compatible with other Latin American endemic areas.


INTRODUÇÃO: O primeiro levantamento sobre cisticercose humana e identificação dos fatores de risco associados à transmissão, foram realizados em Lages, SC. MÉTODOS: Oitocentos e setenta e sete voluntários de regiões periurbana e rural foram entrevistados e forneceram informações demográficas e condições sanitárias e de saúde. Amostras de sangue foram coletadas por meio de punção digital em papel filtro entre agosto 2004 e maio 2005. Verificou-se que 850 amostras estavam adequadas para análise. No ELISA, utilizou-se o antígeno heterólogo liquido vesicular de Taenia crassiceps. Para assegurar a confiabilidade dos resultados de ELISA, foram pareadas 77 amostras de soro e sangue eluido do papel filtro. A confirmação do diagnóstico sorológico foi feita por immunoblot (IB) com glicoproteínas purificadas de Taenia crassiceps. RESULTADOS: A reatividade de IgG eluída de sangue em papel filtro mostrou-se compatível com a dos soros correspondentes. A triagem por ELISA de 850 indivíduos revelou 186 (21,9 por cento) positivos. De 213 pessoas convidadas a colher soro para IB (186 ELISA positivo e 27 com amostras de sangue total inadequadas), compareceram 130. O IB foi positivo em 29 (3,4 por cento) de 850 amostras. Houve correlação significativa entre IB positivo e a prática de criação de suínos e de horta caseira (p = 0,0364). CONCLUSÕES: ELISA com sangue total em papel filtro mostrou-se adequado para inquéritos populacionais para cisticercose. A transmissão da cisticercose humana na área estudada mostrou correlação com criação suína domestica e horta caseira. A prevalência obtida foi semelhante à relatada em áreas endêmicas da América Latina.


Subject(s)
Animals , Female , Humans , Male , Antibodies, Helminth/blood , Cysticercosis/epidemiology , Taenia/immunology , Blood Specimen Collection/instrumentation , Brazil/epidemiology , Cysticercosis/diagnosis , Cysticercosis/parasitology , Enzyme-Linked Immunosorbent Assay , Epidemiologic Methods , Immunoblotting , Paper , Rural Population , Socioeconomic Factors , Swine , Taenia/classification
3.
Arq. neuropsiquiatr ; 68(1): 07-11, Feb. 2010. ilus, tab
Article in English | LILACS | ID: lil-541179

ABSTRACT

Objective: To determine the relationship between Taenia antigen (TA) detection in cerebrospinal fluid (CSF) and magnetic resonance imaging (MRI) findings in patients with definite diagnosis of neurocysticercosis (NC). Method: Sixty-three patients with definite diagnosis of NC were submitted to a MRI of the brain, and to a CSF examination, with a meticulous search for TA by ELISA. Results: TA detection was positive in 36 patients (57.1 percent). A total of 836 lesions were analyzed, greatly within the cerebral parenchyma (98.7 of the lesions). Intact or non-degenerating cysts were the most common evolutive phase observed (50.4 percent of all lesions), 22.1 percent were degenerating cysts and 19.5 percent calcified cysts. We observed a significant relationship between TA levels detected and the total number of lesions and the number of non-degenerating cysts, but not with calcified lesions. Conclusion: According to our results, we propose at least four important types of contribution: (1) TA detection may allow etiologic diagnosis in transitional phases of NC, with non-characteristic images; (2) in final stages of evolution of cysticercoids in the CNS, lesions may not appear on CT or MRI, and TA detection may contribute to a definite etiologic diagnosis; (3) TA detection may permit diagnosis of NC in some patients with previous negative tests for antibody detection in CSF; (4) TA detection may represent an accurate marker of disease activity in the epileptic form of NC.


Objetivo: Determinar a relação entre a detecção de antígeno de Taenia (TA) no líquido cefalorraquidiano (LCR) e achados de ressonância magnética (RM) em pacientes com diagnóstico definitivo de neurocisticersose. Método: Sessenta e três pacientes com diagnóstico de NC foram submetidos a exame de RM e exame de LCR com pesquisa de antígeno de Taenia por método imunoenzimático. Resultados: A detecção de TA foi positiva em 36 pacientes (57,1 por cento). Um total de 836 lesões foram analizadas sendo 98,7 por cento intraparemquimatosas, 50,4 por cento dos cistos encontravam-se íntegros, 22,1 por cento degenerados e 19,5 por cento calcificados. Foi observada relação significativa entre a presença dos níveis de TA detectados com o número total dos cistos e também com o número de cistos íntegros. Não foi observada relação com cistos calcificados. Conclusão: (1) a detecção de TA permite o diagnóstico etiológico em formas transicionais na NC com imagem pouco característica; (2) em estágio evolutivo final de um cisticerco no sistema nervoso, este pode não aparecer na tomografia computadorizada ou RM sendo a presença do antígeno importante para confirmação diagnóstica; (3) a detecção do TA permite também o diagnóstico de NC nos casos em que as reações inumológicas são negativas; (4) a detecção do TA representa um marcador de atividade da doença nas formas epiléticas da NC.


Subject(s)
Adult , Animals , Female , Humans , Male , Middle Aged , Young Adult , Antigens, Helminth/cerebrospinal fluid , Neurocysticercosis/diagnosis , Taenia/immunology , Enzyme-Linked Immunosorbent Assay , Magnetic Resonance Imaging , Neurocysticercosis/cerebrospinal fluid , Neurocysticercosis/pathology , Young Adult
4.
Mem. Inst. Oswaldo Cruz ; 102(6): 725-731, Sept. 2007. ilus, tab
Article in English | LILACS | ID: lil-463479

ABSTRACT

Seven swine were experimentally infected with Taenia solium eggs and blood samples from each animal were periodically collected. At the end of the experiment (t140) the animals did not show clinical aspects of cysticercosis or parasites in tongue inspection. All animals were slaughtered and cut into thin slices in searching for cysts. The number of cysts found in each animal varied from 1 to 85. Enzyme-linked immunosorbent assay (ELISA) tests for antibody (Ab) detection and for antigen (Ag) detection were performed, which presented respectively 71 and 57 percent of positivity. By immunoblot (IB), using 18/14(T. crassiceps Ag) or lentil-lectin-purified glycoproteins from T. solium Ag (LLGP) as Ag, five (71 percent) and six (86 percent) animals were positive, respectively. The association between Ag-ELISA with any IB (18/14 or LLGP) allowed the detection of all animals at 140 days post-experimental infection (days p.e.i.). The use of IB 18/14 combined to the Ag-ELISA allowed the detection of all animals since 70 days p.e.i., and the association between IB LLGP and Ag-ELISA allowed the detection of all animals since 112 days p.e.i. While all animals could be considered healthy by conventional screening tests, the use of immunoassays for detecting Ab and Ag showed better accuracy; therefore it would be more useful than usual clinical examination for screening cysticercosis in slightly infected pigs.


Subject(s)
Animals , Antibodies, Helminth/blood , Antigens, Helminth/blood , Cysticercosis/veterinary , Swine Diseases/diagnosis , Taenia solium/isolation & purification , Cysticercosis/diagnosis , Cysticercosis/immunology , Cysticercosis/parasitology , Enzyme-Linked Immunosorbent Assay , Immunoblotting , Reproducibility of Results , Sensitivity and Specificity , Swine , Swine Diseases/immunology , Swine Diseases/parasitology , Taenia solium/immunology
5.
Mem. Inst. Oswaldo Cruz ; 101(1): 15-20, Feb. 2006. graf
Article in English | LILACS | ID: lil-423561

ABSTRACT

In order to evaluate the taeniosis-cysticercosis complex in a population of a peasants' settlement, located at Teodoro Sampaio, state of São Paulo, Brazil (longitude 52º 36'12 ", latitude 22º 17'12 ") a series of laboratory markers were determined. After signing an informed consent, participants answered a standardized questionnaire. To determine anti-Taenia solium cysticercus antibodies, the samples were tested by enzyme linked immunoabsorbent assay using 18-and 14-kDa antigen proteins from vesicular fluid of Taenia crassiceps (VF-Tcra). The reactive and inconclusive ELISA samples were tested by immunoblotting. Total IgE levels were determined by chemmiluminescence's assay and hemogram by flow cytometer flux counter. A total of 84 individuals, 5.9 percent presented anti-T. solium cysticercus antibodies in ELISA and 3.6 percent were strongly reactive in the 18/14 kDa immunoblotting confirmatory test. All of the individuals with positive antibodies showed elevated Total IgE levels. We conclude that the frequency of anti-T. solium cysticercus antibodies in this population is higher than other regions considered endemic in São Paulo. Thus, it is important to carry out surveys in Peasants' settlement areas with the objective of establishing public health measures for prevention and control of infectious diseases such as taeniosis-cysticercosis.


Subject(s)
Humans , Animals , Male , Female , Child , Adolescent , Adult , Middle Aged , Antibodies, Helminth/blood , Cysticercosis/diagnosis , Immunoglobulin E/blood , Taeniasis/diagnosis , Brazil/epidemiology , Cysticercosis/epidemiology , Enzyme-Linked Immunosorbent Assay , Feces/parasitology , Immunoblotting , Luminescent Measurements , Taeniasis/epidemiology
6.
Rev. Inst. Med. Trop. Säo Paulo ; 46(6): 303-308, Nov.-Dec. 2004. tab
Article in English | LILACS | ID: lil-391585

ABSTRACT

Aspectos sorológicos, epidemiológicos e moleculares da infecção pelo vírus da hepatite C (HCV) foram avaliados em 183 indivíduos da região de Londrina, Paraná. Amostras soropositivas para anti-HCV pelo enzimaimunoensaio de micropartículas (MEIA), provenientes de oito pacientes com hepatite C crônica, 48 doadores de sangue e 127 indivíduos infectados pelo vírus da imunodeficiência humana (HIV), foram submetidas ao enzimaimunoensaio (ELISA) e a reação em cadeia da polimerase (PCR). Em 78,7% das amostras, verificou-se resultado reagente no ELISA, ocorrendo maior proporção de resultados discordantes entre doadores de sangue (70,8%). O mesmo ocorreu com a pesquisa do RNA viral, na qual 111/165 (67,3%) amostras foram positivas com PCR, verificando-se maior positividade entre indivíduos HIV soropositivos e pacientes com hepatite crônica do que em doadores de sangue. Em 61 amostras com viremia detectável, realizou-se a genotipagem do HCV, encontrando-se os genótipos 1 (77,1%), 3 (21,3%) e 2 (1,6%). Por fim, foram avaliados os fatores epidemiológicos em indivíduos com infecção ativa, nos quais o uso de drogas injetáveis foi o principal fator de risco encontrado em indivíduos co-infectados pelo HIV/HCV e a transfusão sangüínea foi o mais comum em indivíduos sem infecção pelo HIV. O presente estudo contribuiu para o conhecimento do perfil da infecção pelo HCV em indivíduos da nossa população e da distribuição dos genótipos do HCV nesta região.


Subject(s)
Humans , Hepacivirus , Hepatitis C , Hepatitis C Antibodies , Blood Donors , Brazil , Chronic Disease , Genotype , Hepatitis C , HIV Infections , Immunoenzyme Techniques , Polymerase Chain Reaction , Prevalence , Risk Factors , RNA, Viral , Seroepidemiologic Studies
7.
Arq. neuropsiquiatr ; 62(3B): 756-760, set. 2004. tab
Article in English | LILACS | ID: lil-384120

ABSTRACT

OBJETIVO: (1) Determinar a concentração de antígenos de Taenia no líquido cefalorraquidiano (LCR) em doentes com neurocisticercose; (2) estudar sua relação com a atividade clínica da doença e com as variáveis clássicas do LCR. MÉTODO: Em 36 pacientes com diagnóstico definido de neurocisticercose foi realizado exame do LCR, com estudo citológico e citomorfológico, exame bioquímico, reações imunológicas para cisticercose e detecção de antígenos de Taenia. Os anticorpos para detecção desses antígenos foram obtidos a partir da forma larvar da Taenia crassiceps, cepa ORF. Após a inoculação e proliferação intraperitoneal dessa forma larvária em ratas, foi imunizado um grupo de coelhos com seu líquido vesicular. RESULTADOS: Em 17 pacientes (47,2%) foi detectado antígeno de Taenia, especialmente naqueles com manifestação epiléptica nos últimos 12 meses. CONCLUSÃO: A detecção de antígeno de Taenia guarda relação significativa com a vigência de formas clinicamente ativas, sendo, nestas formas, marcador mais sensível que a eosinofilorraquia.


Subject(s)
Adult , Animals , Female , Humans , Male , Mice , Middle Aged , Rabbits , Antigens, Helminth/cerebrospinal fluid , Neurocysticercosis/cerebrospinal fluid , Taenia/immunology , Biomarkers/cerebrospinal fluid , Enzyme-Linked Immunosorbent Assay , Neurocysticercosis/immunology , Sensitivity and Specificity
8.
Parasitol. latinoam ; 57(3/4): 129-133, jul.-dic. 2002. tab
Article in English | LILACS | ID: lil-342255

ABSTRACT

A sero-epidemiological study of swine cysticercosis was carried out in 628 swine slaughtered at seven locations in Brazil. 322 of these animals were inspected by approved meat inspectors at three locations and 306 animals were slaughtered at four different locations and were not inspected. Non-inspected swine (prevalence 16,3 percent) were 5,5 times more likely to be seropositive than inspected swine (3,4 percent) (p < 0,0001). The results of this study provide information to further understand the epidemiology of cysticercosis in Brazil


Subject(s)
Animals , Cysticercosis , Meat , Swine , Enzyme-Linked Immunosorbent Assay
9.
J. bras. patol. med. lab ; 38(2): 93-103, jun. 2002. ilus, tab
Article in Portuguese | LILACS | ID: lil-316882

ABSTRACT

Introduçäo: O diagnóstico da neurocisticercose (NCC) deve ser feito pela associaçäo de técnicas de imagem com métodos Elisa e Western blot (Wb), utilizandoðse como antígeno extrato bruto salino da larva da Taenia solium, o Cysticercus cellulosae e Wb, empregandoðse como antígeno cisticercos da Taenia crassiceps em amostras de soro, para o diagnóstico da NCC. Materiais e métodos: Foram avaliadas amostras de soro de 43 pacientes com diagnóstico de NCC: 21 por clínica, tomografia computadorizada de crânio (TC) e presença de anticorpos anticisticerco no líquido cefalorraquiano (LCR); 22 por clínica e TC e 229 pacientes com diferentes parasitoses. Para as análises desses materiais biológicos foram empregados os métodos Elisa, usandoðse como antígeno C. cellulosae, e Wb, usandoðse como antígeno C. cellulosae e Cysticercus longicollis. Resultado: O método Elisa utilizando C. cellulosae como antígeno apresentou especificidade de 95 por cento e sensibilidade de 71 por cento. O método Wb utilizando C. cellulosae ou C. longicollis como antígeno apresentou sensibilidade de 86 por cento e especificidade de 99 por cento. Conclusões: Os métodos imunológicos no LCR säo importantes para a definiçäo da NCC. Entretanto o método Elisa no soro ainda näo é adequado pela sua baixa sensibilidade, podendo auxiliar no diagnóstico da NCC, possibilitando sugerir a existência de forma transicional da doença, näo demonstrada pela TC


Subject(s)
Humans , Antigens, Helminth , Blotting, Western , Enzyme-Linked Immunosorbent Assay , Immunoassay , Neurocysticercosis , Sensitivity and Specificity , Seroepidemiologic Studies , Immunologic Tests/methods
10.
Bol. chil. parasitol ; 56(1/2): 36-42, ene.-jun. 2001. tab
Article in English | LILACS | ID: lil-300167

ABSTRACT

Se utilizó la técnica del inmunoblot para el diagnóstico de la cisticercosis porcina usando un antígeno total de cisticercos de taenia crassiceps. Fueron analizados 13 sueros del cerdo con cisticercosis, 30 sueros controles negativos y ocho sueron del cerdo con hidatidosis, así como nueve del suino con macracantorincosis, 10 con ascaridiosis y ocho con pulmonía. El uso de este antígeno en el inmunoblot con suero de cerdos no se había publicado previamente. El inmunoblot fue padronizado por análisis de titulación en bloque mostrando 100,0 por ciento de sensibilidad y 96,7 por ciento de especificidad. Los péptidos específicos para la cisticercosis en orden de frecuencia fueron: 72-68 kD (100 por ciento), 16-15 kD (77 por ciento), 39-36 kD (62 por ciento), 18-17 kD (54 por ciento, 21 kD (31 por ciento), 14 kD (23 por ciento), 25-23 kD (8 por ciento), y 20-19 kD (8 por ciento). Reacción cruzada (72-68 y 18-17 kD) sólo se descubrió en una muestra (12,5 por ciento) de cerdo con hidatidosis. Debido a sus altas tasas de desempeño, el inmunoblot debe ser útil para confirmar el diagnóstico de cisticercosis porcina y es más eficaz que otras pruebas empleadas para este propósito, como examen de la lengua, examen anatomopatológico y ELISA


Subject(s)
Animals , Cysticercosis , Immunoblotting , Swine Diseases , Taenia , Antigens, Helminth , Cysticercosis , Sensitivity and Specificity , Swine , Swine Diseases , Taenia
11.
Rev. Inst. Med. Trop. Säo Paulo ; 42(2): 67-70, Mar.-Apr. 2000. ilus
Article in English | LILACS | ID: lil-256387

ABSTRACT

Neurocysticercosis (NC), the presence of Taenia solium metacestodes in tissues, is the most frequent and severe parasitic infection of the central nervous system. We investigated the presence of total IgE by an automated chemiluminescence assay in 53 paired cerebrospinal fluid (CSF) and serum samples from patients with NC (P) and in 40 CSF samples from individuals with other neurological disorders as the control group (C). Total IgE concentration ranged from 1.2 to 6.6 IU/ml (mean = 1.4 IU/ml, standard deviation-sd = 1.1 IU/ml) in 28.3 per cent of CSF samples from the P group, a value significantly higher than for the C group (< or = 1.0 IU/ml). The serum samples from the P group showed concentrations ranging from 1.0 to 2330.0 IU/ml (mean = 224.1 IU/ml, sd = 452.1 IU/ml), which were higher than the normal value cited by the manufacturer (<100.0 IU/ml) in 32.1 per cent of the samples. A significant difference was observed in CSF samples from the P and C groups (p = 0.005) and in serum samples from the P group compared to the normal value (p = 0.005), with sera showing more frequent abnormal results.


Subject(s)
Humans , Immunoglobulin E/analysis , Neurocysticercosis/immunology , Immunoglobulin E/blood , Immunoglobulin E/cerebrospinal fluid , Luminescent Measurements
12.
Rev. Inst. Med. Trop. Säo Paulo ; 42(2): 71-9, Mar.-Apr. 2000. ilus, tab, graf
Article in English | LILACS | ID: lil-256388

ABSTRACT

In the present study ELISA was standardized for the diagnosis of swine cysticercosis based on necropsy parameters and confirmed positive and negative control sera. Serum samples from pigs with other infections were also assayed to determine possible cross-reactions. Four antigens were assayed: from Taenia crassiceps vesicular fluid (VF-Tcra) and crude larvae extract (T-Tcra), and from Taenia solium extracts of scolex (S-Ts) and of larvae (T-Ts). A checkerboard evaluation of antigen, serum and conjugate dilutions, as well as the use of Tween-20 and skim cow milk in wash and blocking solution had a marked effect on improving ELISA performance. All the antigens showed a good performance, but VF-Tcra was the best, with 96.0 per cent and 80.0 per cent sensitivities for cut-offs respectively at 2sd and 3sd, and corresponding specificities of 97.5 per cent and 100.0 per cent. Cross-reactivity was observed only with hydatidosis and ascaridiosis. In view of the high performance observed, the ELISA test should be recommended for the diagnosis of cysticercosis in suspected swine in slaughterhouses and for the screening of cysticercosis in swine production. These results will support integrated measures of cysticercosis control throughout the chain of swine production, effectively contributing to public health.


Subject(s)
Animals , Antigens, Helminth/isolation & purification , Cysticercosis/veterinary , Cysticercus/immunology , Swine Diseases/diagnosis , Antigens, Helminth/blood , Biomarkers/blood , Cysticercosis/diagnosis , Enzyme-Linked Immunosorbent Assay , Swine
13.
Arq. neuropsiquiatr ; 58(1): 18-24, mar. 2000. tab, ilus
Article in English | LILACS | ID: lil-255059

ABSTRACT

We assayed samples of cerebrospinal fluid (CSF), serum and saliva from patients with neurocysticercoses, control group and individuals with other parasitoses, by ELISA with Taenia crassiceps vesicular fluid antigen (Tcra) and Taenia solium total antigen (Tso) for the detection of antibodies. The sensitivity for IgG-Tcra was 100 per cent for CSF and serum, and 32.0 per cent for saliva; and for IgG-Tso 100 per cent for CSF, 80.0 per cent for serum and 24 per cent for saliva. Specificity was 100 per cent for CSF and 80.0 per cent for serum with both antigens, and 100 per cent for saliva with Tcra and 87.5 per cent with Tso. The sensitivity and specificity for IgA-Tcra was, respectively, 40.0 per cent and 100 per cent for CSF, 36.0 per cent and 97.1 per cent for serum, and 4.0 per cent and 90.0 per cent for saliva. IgE detection showed 24.0 per cent sensitivity and 97.1 per cent specificity for serum, with no detection in CSF samples. The search for antibodies revealed the presence of IgG > IgA > IgE in CSF, serum and saliva samples, with IgG being present in all phases of the disease, while IgA/IgE were more frequent in the inactive form.


Subject(s)
Humans , Antigens, Helminth/immunology , Immunoglobulin Isotypes/isolation & purification , Neurocysticercosis/immunology , Taenia/immunology , Antibody Formation , Enzyme-Linked Immunosorbent Assay , Immunoglobulin Isotypes/blood , Immunoglobulin Isotypes/cerebrospinal fluid , Saliva/immunology , Sensitivity and Specificity
14.
Rev. bras. anal. clin ; 32(4): 261-4, 2000. tab, graf
Article in Portuguese | LILACS | ID: lil-296341

ABSTRACT

O teste ELISA-"conta" foi empregado em 1.141 amostras de líquido cefalorraquiano. Do total dessas amostras, 1.061 eram oriundos de pacientes com quadro clínico e/ou imagem tomográfica sugestivos de neurocisticercose e 80 amostras-controle, de pacientes com quadros clínico-neurológicos diversos, sendo afastada a possibilidade de possuírem neurocisticercose. Em 205 dessas amostras, foram aplicadas duas metodologias imunoenzimáticas. A primeira utilizando "contas" de poliestireno como suporte (ELISA-"conta") e a Segunda utilizando o antígeno adsorvido em microplaca (ELISA). Observou-se correlaçäo de 94,6 porcento entre os dois testes. Os autores salientam que as vantagens do ELISA-"conta" como o menor custo do suporte, e a possibilidade de dispensar o uso de um aparelho leitor de microplacas, geralmente de alto custo, tornam este método atraente para laboratórios de pequeno porte


Subject(s)
Infant , Child, Preschool , Child , Adolescent , Adult , Middle Aged , Cerebrospinal Fluid/enzymology , Cerebrospinal Fluid/immunology , Neurocysticercosis/diagnosis , Enzyme-Linked Immunosorbent Assay , Fluorescent Antibody Technique, Indirect , Immunoenzyme Techniques , Taenia/pathogenicity
15.
Rev. Inst. Med. Trop. Säo Paulo ; 40(1): 1-5, Jan.-Feb. 1998. ilus
Article in English | LILACS | ID: lil-216099

ABSTRACT

O objetivo do presente estudo foi determinar a prevalência de determinadas espécies de micoplasmas, tais como, Mycoplasma hominis, Ureaplasma urealyticum e Mycoplasma penetrans, em swabs uretrais de pacientes infectados com HIV-1 comparando com um grupo controle. Micoplasmas foram detectados por técnicas padräo de cultivo e pela reacäo de polimerase em cadeia para a qual foram utilizados "primers" genericos obtidos da regiäo conservada 16sRNA e "primers" nos dois metodos foi comparavel. Contudo, o PCR mostrou ser mais sensivel nas condicöes empregadas enquanto que o cultivo permitiu a quantificacäo dos isolados. Os resultados demonstraram näo haver diferenças significantes (p<0,05) nas taxas de positividade entre os metodos empregados para a detecçäo dos micoplasmas


Subject(s)
Humans , Male , Urethral Diseases/etiology , AIDS-Related Opportunistic Infections/physiopathology , Polymerase Chain Reaction , Blotting, Western , Endopeptidase K , Enzyme-Linked Immunosorbent Assay , Mycoplasma hominis/isolation & purification , Mycoplasma penetrans/isolation & purification , Serologic Tests/methods , Ureaplasma urealyticum/isolation & purification
16.
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
17.
Rev. Inst. Med. Trop. Säo Paulo ; 38(6): 391-6, nov.-dez. 1996. ilus, tab
Article in English | LILACS | ID: lil-186860

ABSTRACT

Foi desenvolvido o teste dot-Elisa para deteccao de anticorpos em liquido cefalorraquiano (LCR) no diagnostico imunologico da neurocisticercose humana, utilizando antigenos de membrana e escolex de Cysticercus cellulose (M+E-Cc) e, alternativamente, membrana (M) e liquido vesicular (LV) de Cysticercus longicollis (Cl) covalentemente ligados a um novo suporte constituido de tecido de poliester-resina de N-metilolacrilamida (dot-TR). O teste foi realizado a temperatura ambiente, com tempos de incubacao reduzidos e sem necessidade de cuidados na manipulacao do suporte...


Subject(s)
Humans , Antibodies, Helminth/immunology , Cysticercus/immunology , Enzyme-Linked Immunosorbent Assay , Cysticercosis/cerebrospinal fluid , Neurologic Manifestations , Resins/classification
18.
Rev. Inst. Med. Trop. Säo Paulo ; 38(4): 259-63, jul.-ago. 1996. ilus, tab
Article in English | LILACS | ID: lil-182827

ABSTRACT

A cepa ORF de Cysticercus longicollis (Cl) representa importante modelo para estudo de antigenos heterologos no imunodiagnostico da neurocisticercose (NC). Foi padronizada a tecnica de imunoperoxidase (IP) empregando suspensao antigenica particulada. Amostras de liquido cefalorraquiano (LCR) foram incubadas sobre o antigeno fixado em laminas de microscopia, o conjugado empregado foi anti-IgG-Peroxidase, a reacao enzimatica iniciou-se ao cobrirem-se as laminas com solucao cromogena (Diaminobenzidina/H2O2). Apos lavagens em agua destilada, a lamina foi corada com verde malaquita a 2 por cento em agua. De 21 LCR de pacientes com NC, 19 (90,5 por cento) foram reativos e 8 (100 por cento) LCR do grupo controle foram nao reativos. Os resultados do teste IP-Cl ensaiando 127 LCR de pacientes com suspeita de NC mostrou 89,7 por cento de concordancia com o teste ELISA empregando extrato salino de Cysticercus cellulosae (Cc) e 94,2 por cento de concordancia com o teste IP-Cc


Subject(s)
Animals , Female , Rats , Cysticercosis/cerebrospinal fluid , Immunoenzyme Techniques , Cysticercosis/immunology , Cysticercosis/parasitology , Cysticercus/classification , Cysticercus/ultrastructure , Microscopy , Neurologic Manifestations
19.
Rev. Soc. Bras. Med. Trop ; 29(2): 137-44, Mar.-Apr. 1996. ilus, graf, tab
Article in Portuguese | LILACS, SES-SP | ID: lil-187140

ABSTRACT

A new reagent was designed to the indirect hemagglutination test (IHATIAL), utilizing goose red blood cells as inert matrix and standardized for the field diagnosis of American trypanosomiasis. The objective was to substitute the lyophilized or frozen reagent of IHAT produced routinely using human erythrocytes in the Adolfo Lutz Institute (Säo Paulo/Brazil). The standardized reagent presented a long stability in liquid suspension, and was evaluated in 137 serum samples from patient with and without Chagas' disease, by IHATIAL. The diagnostic performance of this test was similar to the IHAT utilizing human erythrocytes and to that of a commercial IHAT kit. The sensitivity was 1.00, specificity 0.98, predictive value of positive 0.96 and of negative 1.00. Different batches of reagent successively produced proved to be reproducible in a quality control method. The new reagent is more economic than the former reagent, it can be produced easily and may be applicable to the seroepidemiologic studies.


Subject(s)
Humans , Animals , Geese/immunology , Chagas Disease/diagnosis , Hemagglutination Tests/methods , Sensitivity and Specificity , Geese/blood , Indicators and Reagents
20.
In. Machado, Luís dos ramos; Livramento, José Antonio; Netto, Antonio Spina-França; Nóbrega, José Paulo Smith. Neuroinfecçäo 96. Säo Paulo, Clínica Neurológica HC/FMUSP, 1996. p.181-192.
Monography in Portuguese | LILACS | ID: lil-179853
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