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au:Fernandez, Marcos Antonio

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Complicaciones ORL severas por mononucleosis infecciosa en adolescentes sanos: 2 casos clínicos y revisión de la literatura
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Hernando C., Mónica

; López F., Luz

; Pasamontes P., Juan Antonio

; Lowy B., Alejandro

; Schilling B., Andreas

; Fernandez-Fernandez, Mario Marcos

Revista de otorrinolaringología y cirugía de cabeza y cuello

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sep 2022, Volume 82 N. 3 Pages 360 - 365

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

Abstract Infectious mononucleosis (MI) is a generally benign and self-limited condition in childhood and adolescence due to the primary EBV infection characterized by the triad of pharyngitis, fever, and lymphadenopathies. The risk of complications increases with age and immunosuppression. The most frequent fatal complications are those associated with splenic rupture, neurological alterations, and airway obstruction due to increased tonsillar size. Cervical abscesses associated with MI are rare, being mostly peritonsillar and intra-tonsil. We present two surgical cases of big deep cervical abscesses with retropharyngeal and parapharyngeal involvement in healthy very young adolescents (14 and 15 years old), without any type of immunosuppression or risk factors, one of them associated with a clinically relevant spontaneous tonsillar bleeding, which had not been described in the literature associated with MI in such young patient.

Resumen La mononucleosis infecciosa (MI) es un cuadro clínico generalmente benigno y autolimitado en la infancia y adolescencia debido a la primoinfección del virus de Epstein-Barr caracterizado por la triada de faringitis, fiebre y adenopatías. El riesgo de complicaciones aumenta con la edad y la inmunosupresión, siendo las complicaciones letales más frecuentes las asociadas a rotura esplénica, alteraciones neurológicas y obstrucción de la vía aérea por el aumento del tamaño amigdalar. Los abscesos cervicales asociados a MI son poco frecuentes, siendo mayoritariamente periamigdalinos e intraamigdalares. Presentamos dos casos quirúrgicos de abscesos cervicales profundos de gran tamaño con afectación retrofaríngea y parafaríngea en adolescentes sanos de corta edad (14 y 15 años), sin ningún tipo de inmunosupresión o factores de riesgo, uno de ellos asociado además, a una relevante hemorragia amigdalar espontanea, condición no descrita previamente en la literatura en relación a MI en un paciente tan joven.

https://doi.org/10.4067/s0718-48162022000300360

FIRST BRAZILIAN CONSENSUS ON MULTIMODAL TREATMENT OF COLORECTAL LIVER METASTASES. MODULE 1: PRE-TREATMENT EVALUATION
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COIMBRA, Felipe José Fernandez

; RIBEIRO, Heber Salvador de Castro

; MARQUES, Márcio Carmona

; HERMAN, Paulo

; CHOJNIAK, Rubens

; KALIL, Antonio Nocchi

; WIERMANN, Evanius Garcia

; CAVALLERO, Sandro Roberto de Araújo

; COELHO, Fabricio Ferreira

; FERNANDES, Paulo Henrique de Souza

; SILVESTRINI, Anderson Arantes

; ALMEIDA, Maria Fernanda Arruda

; ARAÚJO, Antônio Luis Eiras de

; PITOMBO, Marcos

; TEIXEIRA, Heberton Medeiros

; WAECHTER, Fábio Luiz

; FERREIRA, Fábio Gonçalves

; DINIZ, Alessandro Landskron

; D'IPPOLITO, Giuseppe

; BEGNAMI, Maria Dirlei F. de Sousa

; PROLLA, Gabriel

; BALZAN, Silvio Márcio Pegoraro

; OLIVEIRA, Thiago Bueno de

; SZULTAN, Luís Arnaldo

; LENDOIRE, Javier

; TORRES, Orlando Jorge Martins

ABCD. Arquivos Brasileiros de Cirurgia Digestiva (São Paulo)

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dec 2015, Volume 28 N. 4 Pages 222 - 230

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

Racional : As metástases hepáticas de câncer colorretal são evento frequente e potencialmente fatal na evolução de pacientes com estas neoplasias. Objetivo : Neste módulo procurou-se contextualizar esta situação clínica, bem como parametrizar dados epidemiológicos e de resultados das diversas modalidades de tratamento estabelecidas. Método : Foi realizada discussão sobre como detectar e estadiar o câncer colorretal metastático, bem como o emprego dos métodos de imagem na avaliação de resposta ao tratamento sistêmico instituído. Resultado : Fundamentou na definição de quais pacientes teriam suas metástases consideradas ressecáveis e de como se poderia ampliar a gama de pacientes submetidos às modalidades de tratamento ditas de intuito curativo. Conclusão : Foram apresentados os fatores prognósticos clínicos, patológicos e moleculares com validação para serem levados em consideração na prática clínica.

Background : Liver metastases of colorectal cancer are frequent and potentially fatal event in the evolution of patients with these tumors. Aim : In this module, was contextualized the clinical situations and parameterized epidemiological data and results of the various treatment modalities established. Method: Was realized deep discussion on detecting and staging metastatic colorectal cancer, as well as employment of imaging methods in the evaluation of response to instituted systemic therapy. Results : The next step was based on the definition of which patients would have their metastases considered resectable and how to expand the amount of patients elegible for modalities with curative intent. Conclusion : Were presented clinical, pathological and molecular prognostic factors, validated to be taken into account in clinical practice.

https://doi.org/10.1590/s0102-6720201500040002 5011 downloads

A public health risk assessment for yellow fever vaccination: a model exemplified by an outbreak in the state of São Paulo, Brazil
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Ribeiro, Ana Freitas

; Tengan, Ciléa

; Sato, Helena Keico

; Spinola, Roberta

; Mascheretti, Melissa

; França, Ana Cecilia Costa

; Port-Carvalho, Marcio

; Pereira, Mariza

; Souza, Renato Pereira de

; Amaku, Marcos

; Burattini, Marcelo Nascimento

; Coutinho, Francisco Antonio Bezerra

; Lopez, Luis Fernandez

; Massad, Eduardo

Memórias do Instituto Oswaldo Cruz

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apr 2015, Volume 110 N. 2 Pages 230 - 234

Abstract: En | Text: En | PDF: En

We propose a method to analyse the 2009 outbreak in the region of Botucatu in the state of São Paulo (SP), Brazil, when 28 yellow fever (YF) cases were confirmed, including 11 deaths. At the time of the outbreak, the Secretary of Health of the State of São Paulo vaccinated one million people, causing the death of five individuals, an unprecedented number of YF vaccine-induced fatalities. We apply a mathematical model described previously to optimise the proportion of people who should be vaccinated to minimise the total number of deaths. The model was used to calculate the optimum proportion that should be vaccinated in the remaining, vaccine-free regions of SP, considering the risk of vaccine-induced fatalities and the risk of YF outbreaks in these regions.

https://doi.org/10.1590/0074-02760140345 2714 downloads

Risk of symptomatic dengue for foreign visitors to the 2014 FIFA World Cup in Brazil
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Massad, Eduardo

; Wilder-Smith, Annelies

; Ximenes, Raphael

; Amaku, Marcos

; Lopez, Luis Fernandez

; Coutinho, Francisco Antonio Bezerra

; Coelho, Giovanini Evelim

; Silva Jr, Jarbas Barbosa da

; Struchiner, Claudio José

; Burattini, Marcelo Nascimento

Memórias do Instituto Oswaldo Cruz

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jun 2014, Volume 109 N. 3 Pages 394 - 397

Abstract: En | Text: En | PDF: En

Brazil will host the FIFA World Cup™, the biggest single-event competition in the world, from June 12-July 13 2014 in 12 cities. This event will draw an estimated 600,000 international visitors. Brazil is endemic for dengue. Hence, attendees of the 2014 event are theoretically at risk for dengue. We calculated the risk of dengue acquisition to non-immune international travellers to Brazil, depending on the football match schedules, considering locations and dates of such matches for June and July 2014. We estimated the average per-capita risk and expected number of dengue cases for each host-city and each game schedule chosen based on reported dengue cases to the Brazilian Ministry of Health for the period between 2010-2013. On the average, the expected number of cases among the 600,000 foreigner tourists during the World Cup is 33, varying from 3-59. Such risk estimates will not only benefit individual travellers for adequate pre-travel preparations, but also provide valuable information for public health professionals and policy makers worldwide. Furthermore, estimates of dengue cases in international travellers during the World Cup can help to anticipate the theoretical risk for exportation of dengue into currently non-infected areas.

https://doi.org/10.1590/0074-0276140133 2334 downloads Cited 3 times in SciELO

Organotin pollution from pleasure craft at Paraty, a tourist area of Southeastern Brazil: amelioration or interference?
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Borges, Camila de Leon Lousada

; Fernandez, Marcos Antonio dos Santos

; Castro, Ítalo Braga

; Fillmann, Gilberto

Brazilian Journal of Oceanography

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sep 2013, Volume 61 N. 3 Pages 177 - 186

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

Alguns compostos organoestânicos, como o TBT, são desreguladores endócrinos e causam danos aos ecossistemas marinhos. Mesmo após a proibição global de organoestânicos, níveis crescentes de imposex foram detectados em indivíduos Stramonita haemastoma analisados em 2004 e 2011, em Paraty, área turística no sudeste do Brasil. Os resultados deste estudo indicam que partículas e carbono orgânico dissolvido e xenoestrógenos podem estar interferindo no desenvolvimento dessa síndrome, levando à subestimação de avaliação do imposex. A análise química de três sedimentos de mangue na área mostrou a presença de TBT (16,0-205,7 ng Sn g-1), DBT (10,1-16,4 ng Sn g-1) e MBT (10,1-10,2 ng Sn g-1), mesmo nos locais de referência. As concentrações de butilestânicos e o aumento da incidência de imposex em algumas estações indicam entradas recentes de TBT na área estudada devido ao uso ilegal em pequenas embarcações.

Some organotin compounds, such as TBT, are endocrine disruptors and harm marine ecosystems. Even after the global ban on organotins, increasing imposex levels have been detected in Stramonita haemastoma analyzed in 2004 and 2011 in some locations at Paraty, a tourist area in southeastern Brazil. The results of this study indicate that particulate and dissolved organic carbon and xenoestrogens might be interfering in this syndrome's development, leading to underestimation of imposex evaluation. Chemical analysis of three mangrove swamp sediments in the area showed the presence of TBT (16.0 - 205.7 ng Sn g-1), DBT (10.1 - 16.4 ng Sn g-1) and MBT (10.1 - 10.2 ng Sn g-1) even at the reference sites. The concentrations of butyltins and the increased incidence of imposexat some stations indicate recent inputs of TBT in the study area due to its illegal use on small vessels.

2658 downloads

Relación del estrés oxidativo y la pérdida de peso obtenida en pacientes obesos mórbidos mediante cirugía bariátrica con la técnica del cruce duodenal
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Tursi Ríspoli, Leonardo De

; Vázquez Tarragón, Antonio

; Vázquez Prado, Antonio

; Sáez Tormo, Guillermo

; Ismail Mahmoud, Ali

; Bruna Esteban, Marcos

; Mulas Fernandez, Claudia

; Gumbau Puchol, Verónica

Nutrición Hospitalaria

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aug 2013, Volume 28 N. 4 Pages 1085 - 1092

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

Introduction: Oxidative stress (OS), which is overtly present in morbid obesity, is an indicator of a chronic inflammatory state associated to obesity and possibly related with the associated comorbidities, some of which represent an important risk factor for the occurrence of cardiovascular diseases, so that decreasing its intensity has become a treatment priority. Materials and methods: he have consecutively performed the duodenal crossing surgical technique in 28 patients suffering from morbid obesity, assessing the level of oxidative stress by the determination of the products of molecular oxidation and antioxidants before the surgery and throughout one year after the surgery. Weight evolution and the progression of the comorbidities already present were assessed. Results: the mean age of the patients in this series was 43 ± 1 years and the mean BMI 50.3. 82% had associated comorbidities. After the surgery, all the patients progressively lost weight throughout the study period, with a parallel improvement of the comorbidities and a progressive decrease in OS values and improvement of the antioxidant systems, the OS values being similar to those of a normal population at the end of the study. Conclusion: The weight loss achieved allows improving the comorbidities and the oxidative stress values so that at the end of the study the results obtained are similar to those of a normal population.

Introducción: El estrés oxidativo, presente de forma evidente en los obesos mórbidos, es un indicador del estado inflamatorio crónico que representa la obesidad y posible nexo de unión con sus comorbilidades, algunas de las cuales son un importante factor de riesgo para el desarrollo de enfermedades cardiovasculares, por lo que la atenuación de su intensidad se ha convertido en un objetivo terapéutico. Material y método: Hemos intervenido de forma consecutiva, mediante la técnica quirúrgica del cruce duodenal, a 28 pacientes afectos de obesidad mórbida, realizando un estudio del estrés oxidativo presente en ellos mediante la determinación de productos de oxidación molecular y de antioxidantes, en el preoperatorio y a lo largo de un año tras la cirugía. Se ha controlado la evolución ponderal y la evolución de las comorbilidades presentes. Resultados: Los pacientes de la serie presentaron una media de edad de 43 ± 1 años y un IMC medio de 50,3. El 82% presentó comorbilidad asociada. Tras la cirugía todos los pacientes perdieron peso de forma progresiva a lo largo del periodo estudiado, con mejoría paralela de las comorbilidades y disminución progresiva de los valores del EO y mejoría de los sistemas antioxidantes, siendo los valores de EO al finalizar el estudio similares a los de la población normal. Conclusión: La pérdida de peso obtenida consigue una mejora de las comorbilidades y de los valores de estrés oxidativo de modo que al final del estudio los resultados obtenidos son similares a los de la población normal. Palabras clave: estrés oxidativo, obesidad, obesidad mórbida, cruce duodenal, pérdida de peso.

https://doi.org/10.3305/nh.2013.28.4.6539 1019 downloads

A pesquisa como dispositivo para o exercício no PET-Saúde UFF/FMS Niterói
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Abrahão, Ana Lúcia

; Cordeiro, Benedito Carlos

; Marques, Dalvani

; Daher, Donizete Vago

; Teixeira, Graça Helena Maia do Canto

; Monteiro, Katia Ayres

; Gomes, Lina Nunes

; Senna, Marcos Antônio Albuquerque de

; Gouvêa, Mônica Villela

; Aboud, Sérgio

; Fernandez, Veronica Silva

Revista Brasileira de Educação Médica

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sep 2011, Volume 35 N. 3 Pages 435 - 440

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

O PET-Saúde (Programa de Educação pelo Trabalho para a Saúde) proposto pela Universidade Federal Fluminense (UFF) e pela Fundação Municipal de Saúde de Niterói (FMS) iniciou suas atividades em abril de 2010 com a proposta de desenvolver o processo de ensino-aprendizagem de forma participativa, tendo como eixo central o trabalho no cotidiano dos serviços de saúde, utilizando as ferramentas da pesquisa e avaliação em saúde como elemento disparador do aprendizado. As atividades são desenvolvidas na perspectiva da construção de um diagnóstico de saúde da área de abrangência de cada unidade de saúde à qual o grupo PET está vinculado. A metodologia adotada pelos grupos consiste na investigação participativa, com o envolvimento de profissionais, alunos, usuários e docentes. Como ferramenta vem sendo utilizada a construção da história local, com levantamento de documentos e depoimentos da comunidade. Destaca-se a atividade de cadastramento e recadastramento de famílias e o levantamento do perfil epidemiológico dos territórios. Neste primeiro estágio, identificamos a interação em grupo multiprofissional como um desafio que vem proporcionando grandes avanços no entendimento do processo saúde-doença entre estudantes, docentes e profissionais.

PET-Health (the Educational Program for Health Work) proposed by the Fluminense Federal University (UFF) and the Niterói Municipal Health Foundation (FMS) began its activities in April 2010 with the purpose of developing a participatory teaching-learning process, with daily work in health services as its central thrust, using health research and evaluation tools as the trigger for learning. The activities are developed from the perspective of developing a health diagnosis in the coverage area of each health unit affiliated with PET. The methodology is participatory research with direct involvement by health professionals, students, users, and faculty. Reconstruction of local history has been used as the research tool, including documents searches and interviews with community members. Important activities include registering and re-registering families and an epidemiological profile of neighborhoods. In this first stage, we identified interaction in a multidisciplinary team as a challenge that has fostered major strides in the shared understanding of the health-disease process by students, faculty, and health professionals.

4058 downloads Cited 5 times in SciELO

Organotin pollution at Arraial do Cabo, Rio de Janeiro State, Brazil: increasing levels after the TBT ban
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Toste, Raquel

; Fernandez, Marcos Antônio

; Pessoa, Igor de Araújo

; Parahyba, Mateus Alves

; Dore, Marina Pereira

Brazilian Journal of Oceanography

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mar 2011, Volume 59 N. 1 Pages 111 - 117

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

O imposex, um fenômeno de desregulação endócrina, é um biomarcador da exposição ao tributilestanho (TBT) em populações de gastrópodes marinhos. A ocorrência e intensidade dessa síndrome nas populações do neogastrópode Stramonita haemastoma foram verificadas em nove estações amostrais em outubro de 2008 em Arraial do Cabo, uma área de grande importância turística no Rio de Janeiro (Brasil) e integrante da Reserva Extrativista Marinha de Arraial do Cabo. Com os resultados obtidos foi possível avaliar as alterações ocorridas desde o último biomonitoramento realizado em 2001, nessas mesmas estações. Mesmo após o banimento do TBT pela Marinha do Brasil em 2003, a entrada em vigor dos controles ao uso deste agente com o estabelecimento da NORMAM 23, no Brasil em 2007 pela Marinha, e o banimento completo do TBT nas fórmulas de tintas antiincrustantes pela IMO em escala global, em 2008, o imposex continua a ser detectado. Ao invés de um declínio esperado, observou-se um aumento da extensão das áreas afetadas pelo imposex. Além disso, observou-se a ausência de populações em áreas que em 2001 estavam gravemente afetadas pelo imposex. Esses resultados sugerem um aumento da poluição por TBT na área de estudo, indicando a ineficácia das medidas legislativas.

Imposex, an endocrine disruption phenomenon, is a biomarker of tributyltin (TBT) exposure in marine gastropod populations. The occurrence and intensity of the syndrome in populations of the neogastropod Stramonita haemastoma were ascertained at nine sampling stations in October 2008 at Arraial do Cabo, a very important tourist resort in Rio de Janeiro state (Brazil) and part of the Marine Extractive Reserve of Arraial do Cabo. The results obtained made it possible to evaluate the changes which had occurred since the last biomonitoring campaign, undertaken in 2001, at these same stations. Despite the ban on the use of TBT imposed by the Brazilian Navy in 2003, the controls on the use of this agent in Brazil resulting from the establishment of NORMAM 23 by the Navy in 2007 and the complete ban of organotin compounds in antifouling paint formulae by the IMO on a global scale in 2008, imposex was still detected. Instead of the expected reduction, an increase was observed in the areas affected by imposex. Furthermore, populations in the areas seriously affected by imposex in 2001 were absent in the 2008 sampling campaign. These results suggest an increase in TBT pollution in the study area, indicating the inefficacy of legislative measures.

2863 downloads

First record of imposex in Thais deltoidea (Lamarck, 1822) (Mollusca, Gastropoda, Thaididae) in Vitória, ES, Brazil
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Costa, Mércia Barcellos da

; Fernandez, Marcos Antônio

; Barbiero, Danielle Covre

; Melo, Fernanda Tusholska Vaz de

; Otegui, Mariana Beatriz Paz

; Ferreira, Brisa Saez

Brazilian Journal of Oceanography

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jun 2008, Volume 56 N. 2 Pages 145 - 148

Abstract: En | Text: En | PDF: En

3509 downloads

10.

Preliminary evaluation of human health risks from ingestion of organotin contamined seafood in Brazil
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Fernandez, Marcos Antonio

; Limaverde, Aricelso Maia

; Scofield, Arthur de Lemos

; Wagener, Ângela de Luca Rebello

Brazilian Journal of Oceanography

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jun 2005, Volume 53 N. 1-2 Pages 75 - 77

Abstract: En | Text: En | PDF: En

1335 downloads Cited 2 times in SciELO

11.

Chromosome 17 abnormalities and mutation of the TP53 gene: correlation between cytogenetics, flow cytometry and molecular analysis in three cases of chronic myeloid leukemia
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Otero, Luize

; Cavalcanti Júnior, Geraldo Barroso

; Klumb, Claudete Esteves

; Scheiner, Marcos Antonio Mauricio

; Magluta, Eliane Pereira Simões

; Fernandez, Teresa de Souza

; Silva, Maria Luiza Macedo

; Pires, Virgínia

; Andrade, Gabriela Vasconcelos

; Maia, Raquel Ciuvalschi

; Tabak, Daniel

Genetics and Molecular Biology

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mar 2005, Volume 28 N. 1 Pages 40 - 43

Abstract: En | Text: En | PDF: En

chronic myeloid leukemia (CML) have been described. This chromosomal region contains the tumor suppressor gene TP53 that may be an important factor in the evolution of this disease. In this study, we used flow cytometry and western blotting to assess p53 protein expression and single stranded conformational polymorphism to examine TP53 gene alterations in three patients with CML who showed alterations in 17p. Only the case with del(17)(p11) had p53 expression positive by flow cytometry and an abnormal migration pattern by SSCP analysis. The importance of the correlation between the results obtained with these techniques, as well as the clinical course of the patients, are discussed.

5500 downloads Cited 1 time in SciELO

12.

Thais (Stramonita) rustica (Lamarck, 1822) (Mollusca: Gastropoda: Thaididae), a potential bioindicator of contamination by organotin northeast Brazil
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Castro, Ítalo Braga de

; Meirelles, Carlos A. O.

; Matthews-Cascon, Helena

; Fernandez, Marcos Antonio

Brazilian Journal of Oceanography

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jun 2004, Volume 52 N. 2 Pages 135 - 139

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

A utilização de tintas antiincrustrantes contendo o composto biocida tributilestanho (TBT) tem induzido moluscos neogastrópodes ao imposex. O imposex é caracterizado pelo surgimento de caracteres sexuais masculinos, sobretudo, pênis e vaso deferente não funcionais em fêmeas desses moluscos. Foram coletadas amostras de Thais rústica em oito estações ao longo da costa da cidade de Natal no Rio Grande do Norte. Esses animais foram analisados quanto a presença e o grau de imposex que apresentavam. Os níveis mais elevados de imposex foram observados na estação mais próxima ao porto.

The use of antifouling paints containing the biocide compound tributyltin (TBT) has been shown as an inductor of imposex in neogastropods mollusks. Imposex is characterized by the development of male features in females, mainly the appearance of a no functional vas deferens and penis. Samples of Thais rustica were collected in eight sites in the metropolitan area of Natal city, Rio Grande do Norte state, northeast Brazil, and examined for occurrence of imposex, which was found in many females. The higher imposex levels were presented by samples from sites near city harbor.

3786 downloads Cited 3 times in SciELO

13.

Occurrence of imposex in Thais haemastoma: possible evidence of environmental contamination derived from organotin compounds in Rio de Janeiro and Fortaleza, Brazil
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Fernandez, Marcos Antonio

; Limaverde, Aricelso Maia

; Castro, Italo Braga de

; Almeida, Ana Cristina Martins

; Wagener, Angela de Luca Rebello

Cadernos de Saúde Pública

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apr 2002, Volume 18 N. 2 Pages 463 - 476

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

Existem evidências de que a utilização amplamente disseminada de compostos organoestânicos (TBT e TPT) como antiincrustantes, estabilizadores em plásticos e como pesticidas tenha afetado severamente diversas espécies de organismos marinhos. O mais característico efeito do TBT e do TPT como desreguladores endócrinos é o desenvolvimento de caracteres sexuais masculinos em fêmeas de gastrópodos, conhecido como imposex. Esta síndrome pode levar à esterelização e morte dos organismos afetados. O presente trabalho apresenta uma vista geral ao estado atual do conhecimento sobre a ocorrência do imposex, e reporta os resultados de um estudo conduzido na Baía de Guanabara, Rio de Janeiro, e ao longo da costa de Fortaleza, no Ceará. Diferentes estágios de desenvolvimento do imposex foram verificados neste estudo, os mais proeminentes parecendo associados às fontes pontuais locais conhecidas de TBT e TPT.

There are indications that the widespread use of organotin compounds (TBT and TPT) as antifoulings, as stabilizers in plastic and as pesticides, has severely affected several species of marine organisms. The most striking effect of TBT and TPT as hormonal disruptors is the development of male organs in females of gastropods, currently denominated imposex. This syndrome can lead to the sterilization and death of affected organisms. The present work gives an overview of the present state of knowledge on imposex occurrence and reports results of a survey conducted in Guanabara Bay, Rio de Janeiro and in several sites along the coast of Fortaleza, Ceará State. Different stages of imposex development were verified in this survey, however, the most prominent levels appeared associated to known spot sources of TBT and TPT.

4914 downloads Cited 4 times in SciELO

14.

Occurrence of imposex in Thais haemastoma: possible evidence of environmental contamination derived from organotin compounds in Rio de Janeiro and Fortaleza, Brazil
Facebook Twitter

Other social networks
Google+
LinkedIn
Reddit
StambleUpon
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Metrics
- SciELO Analytics

Fernandez, Marcos Antonio

; Limaverde, Aricelso Maia

; Castro, Italo Braga de

; Almeida, Ana Cristina Martins

; Wagener, Angela de Luca Rebello

Cadernos de Saúde Pública

Journal Metrics
- Sobre o periódico
- SciELO Analytics

apr 2002, Volume 18 N. 2 Pages 463 - 476

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

2485 downloads Cited 4 times in SciELO

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