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Abstract INTRODUCTION Suckling by schistosomotic mice improves anti-ovalbumin (OA) antibody production, while delayed-type hypersensitivity (DTH) remains unaffected. This property of milk from schistosomotic mice was investigated in IL-12/IL-23-deficient mice (IL-12p40KO). METHODS We compared anti-OA DTH, IgG2a and cytokines in wild-type and IL-12p40KO mice suckled by infected (SIM) or non-infected (CONTROL) mothers. RESULTS SIM mice showed similar intensity and eosinophils in the DTH, which was abolished in IL-12p40KO and IL-12p40KO-SIM mice. In IL-12p40KO-SIM, IgG2a and TGF-β levels were higher, but IL-6 levels were lower. CONCLUSIONS Milk from schistosomotic mothers may evoke IgG2a without eliciting DTH in IL-12/IL-23 deficiencies, by changing TGF-β/IL-6 levels.

https://doi.org/10.1590/0037-8682-0744-2020 220 downloads

Evaluation of Polymorphisms in IL8 and IL16 Genes in Patients with Acute Coronary Syndrome
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Silva, Lílian Caroliny Amorim

; Araújo, Romário Martins

; Soares, Fábia Carla Silva

; Werkhauser, Roberto Pereira

; Montenegro, Sergio Tavares

; Tashiro, Tetsuo

; Carvalho, Viviane do Carmo Vasconcelos

; Montenegro, Silvia Maria Lucena

International Journal of Cardiovascular Sciences

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may 2020, Volume 33 N. 3 Pages 254 - 262

Abstract: En | Text: En | PDF: En

Abstract Background: Acute coronary syndrome (ACS) is a cardiovascular disease caused by obstruction of coronary arteries by atheromatous plaque. Susceptibility to this disease may be related to genetic variations, such as single nucleotide polymorphisms (SNPs). Objective: In this study, we evaluated the relationship between SNPs in IL8 (rs4073; -251 A/T) and IL16 (rs11556218; T/G) genes and SCA in a Brazilian population. Materials and Methods: A sample of 200 patients with ACS and 50 non-ACS patients hospitalized at the Real Hospital Português, Recife - PE, Brazil, and 220 blood donors (donors) was used. Genotyping was carried out by polymerase chain reaction, and DNA sequencing. Statistical analyzes were performed using the Williams G, Chi-square and Kruskal Wallis tests, using the BioEstat 5.0 program, and the data with a value of p < 0.05 were considered significant. Results: In the IL8 gene, the AT genotype was the most frequent (p > 0.05) in all three groups. In the IL16 gene, genotypic distributions were different between patients with ACS and the donor group (p = 0.002), with the most frequent G allele in the second group (p = 0.0052). The IL-16 cytokine was higher in donors than in patients with ACS (p = 0.04) and the G (TG + GG) allele had higher values of this cytokine (p = 0.01). Conclusions: The results demonstrate the important role of the rs11556218 SNP in IL16 gene in SCA, evidencing that the G allele may be associated with a decreased risk of the disease.

https://doi.org/10.36660/ijcs.201810080 1478 downloads

Social conditions and immune response in human immunodeficiency virus-seropositive pregnant women: a cross-sectional study in Brazil
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Sampaio, Aletheia Soares

; Vasconcelos, Ana Lucia Ribeiro de

; Morais, Clarice Neuenschwander Lins de

; Diniz, George Tadeu Nunes

; Figueiredo, Anna Lígia de Castro

; Montenegro, Sílvia Maria Lucena

Revista da Sociedade Brasileira de Medicina Tropical

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feb 2018, Volume 51 N. 1 Pages 21 - 29

Abstract: En | Text: En | PDF: En

Abstract INTRODUCTION The functioning of the immune system during pregnancy is altered in both human immunodeficiency virus (HIV)-infected and uninfected women. Unfavorable socioeconomic conditions have been indicative of higher morbidity and mortality and worsening of the immune system. The aim of this study was to correlate social status with levels of interleukin (IL)-10 (non-inflammatory) and interferon-gamma (IFN-γ; inflammatory) cytokines. METHODS A cross-sectional study was conducted with three groups of women: 33 pregnant HIV-infected (G1); 40 non-pregnant, HIV-infected (G2); and 35 pregnant, HIV-uninfected. To measure the social status, a compound indicator called the social status index (SSI), was established using sociodemographic variables (i.e., education level, housing conditions, per capita income, and habitation and sanitary conditions). RESULTS The HIV-infected women had a higher proportion of unfavorable SSI (73% and 75% of G1 and G2, respectively). There were significantly lower IL-10 levels in the G1 group with both unfavorable and favorable SSI than in the other groups. No significant difference in IFN-γ levels was observed among groups. However, the G1 group had higher IFN-γ values among both favorable and unfavorable SSI groups. CONCLUSIONS Higher rates of unfavorable conditions, including lower education levels, IL-10 levels, and a trend for higher IFN-γ levels, were identified among HIV-infected women, pregnant and non-pregnant. These factors may interfere in health care and lead to poor outcomes during pregnancy. Therefore, we suggest that health policies could be created to specifically address these factors in this population.

https://doi.org/10.1590/0037-8682-0107-2017 1123 downloads

New index for the diagnosis of liver fibrosis in Schistosomiasis mansoni
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BARRETO, Ana Virgínia Matos Sá

; ALECRIM, Vinícius Martins

; MEDEIROS, Tibério Batista de

; DOMINGUES, Ana Lúcia Coutinho

; LOPES, Edmundo Pessoa

; MARTINS, João Roberto Maciel

; NADER, Helena Bonciani

; DINIZ, George Tadeu Nunes

; MONTENEGRO, Silvia Maria Lucena

; MORAIS, Clarice Neuenschwander Lins de

Arquivos de Gastroenterologia

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mar 2017, Volume 54 N. 1 Pages 51 - 56

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

RESUMO CONTEXTO A fibrose periportal é a maior consequência patológica da infecção pelo Schistosoma mansoni. OBJETIVO Avaliar a acurácia de marcadores séricos e construir um índice para avaliar a fibrose. MÉTODOS Pacientes (n=116) com esquistossomose foram avaliados pela ultrassonografia e dosados os níveis de aminotransferases, γ-glutamil transferase, fosfatase alcalina, ácido hialurônico, citocinas e plaquetas. Imagens de ultrasom foram utilizadas para avaliar a fibrose através de classificação de Niamey e identificados 19 pacientes sem fibrose periportal (padrão A e B), 48 com fibrose média a moderada (C e D) e 49 com fibrose avançada (E e F). RESULTADOS Através de análise multivariada, um modelo foi criado, que envolveu a fosfatase alcalina e plaquetas e conseguiu separar pacientes com diferentes padrões de fibrose periportal. Este índice mostrou um melhor desempenho em separar pacientes sem fibrose dos pacientes com fibrose avançada. O índice biológico mostrou uma área sob a curva ROC de 1,000. Usando valores infereiores e acima do ponto de corte, a presença ou ausência de fibrose avançada pode ser prevista em todos os pacientes. CONCLUSÃO O índice construído pode ser usado para separar os pacientes com diferentes padrões de fibrose periportal, especialmente para prever fibrose avançada em pacientes com esquistossomose.

ABSTRACT BACKGROUND Periportal fibrosis is the major pathological consequence of the Schistosoma mansoni infection. OBJECTIVE To evaluate the accuracy of serum markers and to construct an index to assess fibrosis. METHODS Patients (n=116) with schistosomiasis were evaluated by ultrasound scan and measurements of serum levels of aminotransferases, γ-glutamyl transferase, alkaline phosphatase, hyaluronic acid, cytokines and platelets. Ultrasound images were used to evaluate the fibrosis using Niamey's classification and identified 19 patients without periportal fibrosis (patterns A and B), 48 with mild to moderate fibrosis (C and D) and 49 with advanced fibrosis (E and F). RESULTS Using multivariate analysis, a model was created, which involved alkaline phosphatase and platelets and could separate patients with different patterns of fibrosis. This index showed a better performance in separating patients without fibrosis from with advanced periportal fibrosis. The biological index showed an area under the ROC curve of 1.000. Using values below the lowest or above the highest cut-off point, the presence or absence of advanced fibrosis could be predicted in all patients. CONCLUSION The index constructed can be used to separate patients with different patterns of periportal fibrosis, specially to predict advanced fibrosis in schistosomiasis patients.

https://doi.org/10.1590/s0004-2803.2017v54n1-10 2567 downloads

Association between Schistosomiasis mansoni and hepatitis C: systematic review
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Van-Lume, Daniele Silva de Moraes

; de Albuquerque, Maria de Fatima Pessoa Militao

; de Souza, Alexandre Ignacio

; Domingues, Ana Lucia Coutinho

; Lopes, Edmundo Pessoa de Almeida

; de Morais, Clarice Neuenschwander Lins

; Montenegro, Silvia Maria Lucena

Revista de Saúde Pública

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jun 2013, Volume 47 N. 2 Pages 414 - 424

Abstract: Pt En Es | Text: Pt En Es | PDF: Pt | PDF: En | PDF: Es

OBJETIVO: Realizar revisão sistemática sobre a prevalência da confecção do vírus da hepatite C e Schistosoma mansoni e os fatores de risco associados a indivíduos com esquistossomose. MÉTODOS: Revisão realizada nas bases de dados Medline, Lilacs, SciELO, Biblioteca Cochrane e Ibecs. Os critérios de seleção e a obtenção dos dados foram baseados em métodos de revisão sistemática. Foram encontradas 45 referências relevantes, das quais nove foram excluídas na primeira triagem, 14 na leitura dos resumos e nove na leitura completa. Treze artigos foram selecionados para análise. RESULTADOS: A prevalência da associação entre vírus da hepatite C e Schistosoma mansoni variou de 1% na Etiópia a 50% no Egito. Alguns estudos apresentam metodologias pouco definidas, mesmo em áreas caracterizadas pela associação entre vírus da hepatite C e S. mansoni , como Brasil e Egito, o que não permitiu conclusões consistentes. As taxas de infecção pelo VHC em populações esquistossomáticas foram heterogêneas e os fatores de risco para adquirir o vírus foram variáveis. CONCLUSÕES: Apesar das limitações, esta análise pode ajudar a identificar regiões com maiores taxas dessa associação. Outros estudos serão necessários para o desenvolvimento de políticas públicas de prevenção e controle dessas doenças.

OBJECTIVE: To perform a systematic review of the prevalence of the HCV/ S. mansoni co-infection and associated factors in Schistosoma mansoni -infected populations. METHODS: The bibliographic search was carried out using the Medline, Lilacs, SciELO, Cochrane Library and Ibecs databases. The criteria for the studies' selection and the extraction data were based on systematic review methods. Forty five studies were found, with nine being excluded in a first screening. Thirteen articles were used for data extraction. RESULTS: The HCV infection rates in schistosomiasis populations range from 1% in Ethiopia to 50% in Egypt. Several studies had poorly defined methodologies, even in areas characterized by an association between hepatitis C and schistosomiasis, such as Brazil and Egypt, which meant conclusions were inconsistent. HCV infection rates in schistosomotic populations were heterogeneous and risk factors for acquiring the virus varied widely. CONCLUSIONS: Despite the limitations, this review may help to identify regions with higher rates of hepatitis C and schistosomiasis association. However, more studies are necessary for the development of public health policies on prevention and control of both diseases.

OBJETIVO: Realizar revisión sistemática sobre la prevalencia de la co-infección del virus de la hepatitis C y Schistosoma mansoni y los factores de riesgo asociados a individuos con esquistosomosis. MÉTODOS: Revisión realizada en las bases de datos MEDLINE, LILACS, SciELO, Biblioteca Cochrane e IBECS. Los criterios de selección y la obtención de los datos fueron basados en métodos de revisión sistemática. RESULTADOS: Fueron encontradas 45 referencias relevantes, de las cuales, nueve fueron excluidas en la primera selección, 14 en la lectura de los resúmenes y nueve en la lectura completa. Trece artículos fueron seleccionados para análisis. La prevalencia de la asociación entre virus de la hepatitis C y Schistosoma mansoni varió de 1% en Etiopia, a 50% en Egipto. Algunos estudios presentan metodologías poco definidas, inclusive en áreas caracterizadas por la asociación entre el virus de la hepatitis C y S. mansoni, como Brasil y Egipto, lo que no permitió conclusiones consistentes. Los cocientes de infección por el VHC en poblaciones esquistosómicas fueron heterogéneos y los factores de riesgo para adquirir el virus fueron variables. CONCLUSIONES: A pesar de las limitaciones, este análisis pudo ayudar a identificar regiones con mayores cocientes de esa asociación. Otros estudios serán necesarios para el desarrollo de políticas públicas de prevención y control de estas enfermedades.

https://doi.org/10.1590/S0034-910.2013047004247 2137 downloads

Association between Schistosomiasis mansoni and hepatitis C: systematic review
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Van-Lume, Daniele Silva de Moraes

; de Albuquerque, Maria de Fatima Pessoa Militao

; de Souza, Alexandre Ignacio

; Domingues, Ana Lucia Coutinho

; Lopes, Edmundo Pessoa de Almeida

; de Morais, Clarice Neuenschwander Lins

; Montenegro, Silvia Maria Lucena

Revista de Saúde Pública

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jun 2013, Volume 47 N. 2 Pages 414 - 424

Abstract: Pt En Es | Text: Pt En Es | PDF: Pt | PDF: En | PDF: Es

https://doi.org/10.1590/S0034-910.2013047004247 4368 downloads

Comment on: the relationship between splenomegaly and hematologic findings in patients with hepatosplenic schistosomiasis
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Montenegro, Silvia Maria Lucena

Revista Brasileira de Hematologia e Hemoterapia

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2013, Volume 35 N. 5 Pages 305 - 306

Abstract: En | Text: En | PDF: En

https://doi.org/10.5581/1516-8484.20130114 1861 downloads

Correlation of biological serum markers with the degree of hepatic fibrosis and necroinflammatory activity in hepatitis C and schistosomiasis patients
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Morais, Clarice Neuenschwander Lins de

; Carvalho, Bruno de Melo

; Melo, Wlademir Gomes de

; Melo, Fábio Lopes de

; Lopes, Edmundo Pessoa de Almeida

; Domingues, Ana Lúcia Coutinho

; Jucá, Norma

; Martins, João Roberto Maciel

; Diniz, George Tadeu Nunes

; Montenegro, Silvia Maria Lucena

Memórias do Instituto Oswaldo Cruz

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jul 2010, Volume 105 N. 4 Pages 460 - 466

Abstract: En | Text: En | PDF: En

Liver biopsy is the gold-standard method to stage fibrosis; however, it is an invasive procedure and is potentially dangerous. The main objective of this study was to evaluate biological markers, such as cytokines IL-13, IFN-γ, TNF-α and TGF-β, platelets, bilirubins (Bil), alanine aminotransferase (ALT) and aspartate aminotransferase (AST), total proteins, γ-glutamil transferase (γ-GT) and alkaline phosphatase (AP), that could be used to predict the severity of hepatic fibrosis in schistosomiasis and hepatitis C (HC) as isolated diseases or co-infections. The following patient groups were selected: HC (n = 39), HC/hepatosplenic schistosomiasis (HSS) (n = 19), HSS (n = 22) and a control group (n = 13). ANOVA and ROC curves were used for statistical analysis. P < 0.05 was considered significant. With HC patients we showed that TNF-α (p = 0.020) and AP (p = 0.005) could differentiate mild and severe fibrosis. With regard to necroinflammatory activity, AST (p = 0.002), γ-GT (p = 0.034) and AP (p = 0.001) were the best markers to differentiate mild and severe activity. In HC + HSS patients, total Bil (p = 0.008) was capable of differentiating between mild and severe fibrosis. In conclusion, our study was able to suggest biological markers that are non-invasive candidates to evaluate fibrosis and necroinflammatory activity in HC and HC + HSS.

2466 downloads

10.

Cytokine profile associated with chronic and acute human schistosomiasis mansoni
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Morais, Clarice Neuenschwander Lins de

; Souza, Joelma Rodrigues de

; Melo, Wlademir Gomes

; Aroucha, Marcílio L

; Miranda, Paulo

; Domingues, Ana Lúcia Coutinho

; Abath, Frederico Guilherme Coutinho

; Montenegro, Silvia Maria Lucena

Memórias do Instituto Oswaldo Cruz

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sep 2008, Volume 103 N. 6 Pages 561 - 568

Abstract: En | Text: En | PDF: En

The production and regulation of interleukin (IL) IL-13, IL-4 and interferon-gamma (IFN-³) was evaluated in 43 schistosomiasis patients with different clinical forms. Whole-blood cultures cytokine production in response to soluble egg antigen (SEA), soluble worm adult preparation (SWAP), mitogens, neutralizing antibodies or recombinant IL-13 were measured by ELISA. After SWAP stimulation, chronic patients, particularly hepatointestinals, produced higher levels of IL-4 in comparison with acute patients, suggesting the presence of a type 2 cytokine profile in these patients. Following SEA and SWAP stimulation, hepatosplenic (HS) patients showed increased levels of IFN-³ when compared with acute patients, indicating that HS disease in humans is associated with a type 1 cytokine response. The mechanisms of immune regulation are apparently different between the clinical stages of the disease, some of which are antigen-specific.

2542 downloads

11.

The effect of Zymomonas mobilis culture on experimental Schistosoma mansoni infection
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Santos, Juliana de Fátima Macedo

; Vasconcelos, Joelma

; Souza, Joelma Rodrigues de

; Coutinho, Eridan de Medeiros

; Montenegro, Silvia Maria Lucena

; Azevedo-Ximenes, Eulália

Revista da Sociedade Brasileira de Medicina Tropical

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dec 2004, Volume 37 N. 6 Pages 502 - 504

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Camundongos C57Bl/10 do sexo masculino, infectados com Schistosoma mansoni foram distribuídos nos grupos misto, profilático e curativo. Cultura de Zymomonas mobilis foi administrada oralmente aos camundongos. Uma proteção de 61% foi observada no grupo curativo (p<0,05). Os estudos histopatológicos dos fígados e intestinos mostraram resultados similares.

C57Bl/10 male mice infected with Schistosoma mansoni were distributed into mixed, prophylactic and curative groups. A culture of Zymomonas mobilis was orally administered to mice. A 61% protection from the infection was observed in the curative group (p <0.05). Histopathological study of the livers and intestines showed similar results.

2936 downloads

12.

Specific situations related to acute schistosomiasis in Pernambuco, Brazil
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Barbosa, Constança Simões

; Montenegro, Silvia Maria Lucena

; Abath, Frederico Guilherme Coutinho

; Domingues, Ana Lúcia Coutinho

Memórias do Instituto Oswaldo Cruz

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sep 2001, Volume 96 Pages 169 - 172

Abstract: En | Text: En | PDF: En

The present work reports on two epidemiological episodes resulting in acute schistosomiasis involving wealthy persons living in the State of Pernambuco, Brazil. The authors discuss the epidemiological, clinical and serologic characteristics of the acute infections and also the way in which the conditions for transmission occurred.

2068 downloads Cited 10 times in SciELO

13.

Epidemia de esquistossomose aguda na praia de Porto de Galinhas, Pernambuco, Brasil
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Barbosa, Constança Simões

; Domingues, Ana Lúcia Coutinho

; Abath, Frederico

; Montenegro, Silvia Maria Lucena

; Guida, Ubiracy

; Carneiro, Jefferson

; Tabosa, Barnabé

; Moraes, Clarice N. Lins de

; Spinelli, Vitorino

Cadernos de Saúde Pública

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jun 2001, Volume 17 N. 3 Pages 725 - 728

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

Este trabalho notifica a ocorrência de um surto de esquistossomose aguda na praia de Porto de Galinhas, Pernambuco, Brasil, quando 662 pessoas tiveram diagnóstico positivo para Schistosoma mansoni. A infecção humana em massa ocorreu no feriado de 7 de setembro, quando chuvas pesadas provocaram a enchente do rio Ipojuca que invadiu as residências. A maioria dos casos agudos foi representada por famílias de residentes locais que tiveram exposição diária às cercárias durante três semanas, até que as águas baixassem. O inquérito malacológico aponta para a possibilidade dos caramujos vetores terem sido introduzidos na localidade com os aterros realizados em quintais, onde vieram a se reproduzir em criadouros peridomiciliares. A infecção dos moluscos se deu a partir de vazamentos de fossas. Os resultados da clínica e do laboratório apontam para cerca de 62% de casos agudos. Estudos complementares estão sendo realizados, para a melhor compreensão deste evento epidemiológico de significativa magnitude para os órgãos de saúde pública e impacto para a população afetada.

We recently confirmed several cases of acute schistosomiasis in Porto de Galinhas beach, Northeast Brazil. A total of 662 patients were diagnosed by parasitological and clinical examinations. The infection likely occurred during the September 7 national holiday, when heavy rainfall flooded the Ipojuca River and people were infected when the water covered their yards. Families were continuously exposed to infection for a period of three weeks until the water had completely dried up. Previous investigation suggests that snail vectors were introduced as a result of landfill in marshy areas. The swamp-flooding of such areas facilitated the emergence of slums surrounded by snail breeding sites. Heavy rainfall caused open-air sewage ditches to overflow, allowing for infection of snails by Schistosoma mansoni. Thus, continuous floods were responsible for the spread of human infection. Clinical and laboratory results identified 62% of acute cases of S. mansoni. Complementary studies are being conducted to define the impact and epidemiological meaning of the acute schistosomiasis outbreak.

4281 downloads Cited 21 times in SciELO

14.

Epidemia de esquistossomose aguda na praia de Porto de Galinhas, Pernambuco, Brasil
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Barbosa, Constança Simões

; Domingues, Ana Lúcia Coutinho

; Abath, Frederico

; Montenegro, Silvia Maria Lucena

; Guida, Ubiracy

; Carneiro, Jefferson

; Tabosa, Barnabé

; Moraes, Clarice N. Lins de

; Spinelli, Vitorino

Cadernos de Saúde Pública

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jun 2001, Volume 17 N. 3 Pages 725 - 728

Abstract: Pt En | Text: Pt En | PDF: Pt | PDF: En

7359 downloads Cited 21 times in SciELO

15.

Produção de citocinas na esquistossomose mansônica humana e seus mecanismos regulatórios
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Montenegro, Silvia Maria Lucena

Revista da Sociedade Brasileira de Medicina Tropical

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dec 1999, Volume 32 N. 6 Pages 725 - 726

Abstract: Pt | Text: Pt | PDF: Pt

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