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1.
Metabolic profile, antimicrobial and toxicity evaluation of Azadirachta indica roots
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Romão, Ana Lúcia Eufrázio
; Abreu, Katiany do Vale
; Fontenelle, Raquel Oliveira dos Santos
; Silva, Ana Luiza Beserra da
; Alves, Carlucio Roberto
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RESUMO: Os constituintes do extrato hidroetanólico da raiz deA. indicaforam investigados por cromatografia líquida de ultra-alta performance acoplada à espectrometria de massas do tipo quadrupolo-tempo de voo (UPLC-QTOOF-MSE). A toxicidade aguda foi avaliada em modelo animal. Investigamos as atividades antibacterianas contra Salmonella typhimuriumeStaphylococcus aureuse as atividades antifúngicas contra cepas deTrichophyton rubrum, Candida albicanseCandida tropicalis. Identificamos nove metabólitos secundários no extrato etanólico por UPLC-QTOOF-MSE. O extrato foi altamente eficaz na inibição do crescimento de cepas de T. rubrum, podendo ser eficaz no combate ao dermatofito avaliado, mas não apresentou potencial de inibição em nenhuma cepa bacteriana ou espécies deCandidaavaliadas. Também foi possível inferir que o extrato não apresentou toxicidade aguda em relação ao modelo animalDanio rerio. Portanto, como o Neem tem alto potencial bioativo e se adapta bem ao clima das regiões semiáridas, o cultivo dessa espécie pode se tornar uma fonte de renda para os agricultores a partir da utilização da planta para produção de fungicida e/ou fármaco naturais como alternativa aos produtos convencionais, que podem causar resistência microbiológica e/ou são tóxicas ao meio ambiente, além de serem caros.
ABSTRACT: The constituents of the hydroethanolic extract ofAzadiractaindicaroot were investigated using ultra-performance liquid chromatography-quadrupole-time-of-flight mass spectrometry (UPLC-QTOOF-MSE). Acute toxicity was evaluated in an experimental animal model. We investigated the antibacterial activities ofA. indicaroots againstSalmonella typhimuriumandStaphylococcus aureusand the antifungal activities against strains ofTrichophyton rubrum, Candida albicansandCandida tropicalis. We identified nine secondary metabolites in the hydroethanolic extract by UPLC-QTOOF-MSE. The extract was highly effective in inhibiting the growth of T. rubrum strains, so it can be effective in combating the dermatophyte tested,but it had no inhibition potential on any bacterial strains orCandidaspecies evaluated. It was possible to infer that the extract had no acute toxicity in relation to the animal model Danio rerio. Therefore, since neem has a high bioactive potential and adapts well to the climate of semiarid regions, growing this species could become a source of income for farmers by its use to produce naturals fungicide and drug, as alternatives to conventional products, which can cause microbiological resistance and/or are toxic to the environment, besides being expensive.
2.
Herd-level based seroprevalence and associated factors for Toxoplasma gondii in cows in the state of Paraíba, Northeastern Brazil
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Maia, Amanda Rafaela Alves
; Bezerra, Roberto Alves
; Silva, Samara Santos
; Álvares, Felipe Boniedj Ventura
; Santos, Carolina de Sousa Américo Batista
; Alves, Clebert José
; Clementino, Inácio José
; Feitosa, Thais Ferreira
; Vilela, Vinícius Longo Ribeiro
; Azevedo, Sérgio Santos de
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Revista Brasileira de Parasitologia Veterinária
- Métricas do periódico
Abstract We aimed to determine the herd and animal levels seroprevalence and associated factors for Toxoplasma gondii infections in cattle from the state of Paraíba, Northeastern Brazil. Herds (n = 434) and cows aged ≥ 24 months (n = 1,895) were randomly selected, and serum samples were tested with the immunofluorescence antibody test (IFAT) using as cutoff of 64. Of the 434 farms investigated, 197 had at least one seropositive cow (prevalence of 49.0%; 95% CI = 44.3%-53.8%), and the prevalence at animal level was 18.0% (95% CI = 5.3%-21.1%). The antibody titers ranged from 64 to 1024, with the most frequent titers being 64 (10.8%) and 128 (3.7%). The risk factors identified were property located in Sertão region (odds ratio [OR] = 3.07), property located in Agreste/Zona da Mata regions (OR = 2.00), animal purchasing (OR = 2.68), herd size of 34-111 animals (OR = 2.91) and herd size > 111 animals (OR = 6.97). The results suggest the wide distribution of T. gondii infections in cattle throughout the state of Paraíba, and the risk factors identified are not possible to correct.
Resumo Objetivou-se determinar a soroprevalência do rebanhos e de animais e os fatores associados à infecção por Toxoplasma gondii em bovinos do estado da Paraíba, Nordeste do Brasil. Rebanhos (n = 434) e vacas com idade ≥ 24 meses (n = 1.895) foram selecionados aleatoriamente, e as amostras de soro foram testadas com o teste de imunofluorescência (RIFI), usando-se como ponto de corte 64. Das 434 fazendas investigadas, 197 tiveram pelo menos uma vaca soropositiva (prevalência de 49%; IC 95% = 44,3%-53,8%), e a prevalência em nível de animais foi de 18% (IC 95% = 5,3%-21,1%). Os títulos de anticorpos variaram de 64 a 1024, sendo os títulos mais frequentes 64 (10,8%) e 128 (3,7%). Os fatores de risco identificados foram na propriedade localizada na região do Sertão ("odds ratio" [OR] = 3,07), na propriedade localizada na região do Agreste/Zona da Mata (OR = 2,00), na compra de animais (OR = 2,68), no tamanho do rebanho de 34-111 animais (OR = 2,91) e no tamanho do rebanho > 111 animais (OR = 6,97). Os resultados sugerem a ampla distribuição de infecções por T. gondii em bovinos em todo o estado da Paraíba, e os fatores de risco identificados não são passíveis de correção.
3.
[SciELO Preprints] - Guideline of the Brazilian Society of Cardiology on Diagnosis and Treatment of Patients with Chagas Disease Cardiomyopathy
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Marin-Neto, José Antonio
Rassi Jr., Anis
Moraes Oliveira, Gláucia M.
Lemos Correia, Luís Claudio
Novaes Ramos Jr., Alberto
Hasslocher-Moreno, Alejandro Marcel
Luquetti Ostermayer, Alejandro
Sousa, Andréa Silvestre de
Amato Vincenzo de Paola, Angelo
Sobral de Sousa, Antonio Carlos
Pinho Ribeiro, Antonio Luiz
Correia Filho, Dalmo
Moraes de Souza, Dilma do Socorro
Cunha-Neto, Edecio
J. A. Ramires, Felix
Bacal, Fernando
Pereira Nunes, Maria do Carmo
Martinelli Filho, Martino
Ibrahim Scanavacca, Maurício
Magalhães Saraiva, Roberto
Alves de Oliveira Júnior, Wilson
M. Lorga-Filho, Adalberto
de Jesus Benevides de Almeida Guimarães, Adriana
Lopes Latado Braga, Adriana
Sarmento de Oliveira, Adriana
V. L. Sarabanda, Alvaro
Yecê das Neves Pinto, Ana
Assis Lopes do Carmo, André
Schmidt, André
Costa, Andréa Rodrigues da
Ianni, Barbara Maria
Markman Filho, Brivaldo
Eduardo Rochitte, Carlos
Thé Macedo, Carolina
Mady, Charles
Chevillard, Christophe
Bittencourt das Virgens, Cláudio Marcelo
Nery de Castro, Cleudson
De Paoli de Carvalho Britto, Constança Felícia
Pisani, Cristiano
do Carmo Rassi, Daniela
C. Sobral Filho, Dario
Rodrigues Almeida, Dirceu
A. Bocchi, Edimar
T. Mesquita, Evandro
de Souza Nogueira Sardinha Mendes, Fernanda
Pereira, Francisca Tatiana
Sperandio da Silva, Gilberto Marcelo
de Lima Peixoto, Giselle
Glotz de Lima, Gustavo
H. Veloso, Henrique
Turin Moreira, Henrique
Bellotti Lopes, Hugo
Masciarelli Francisco Pinto, Ibraim
Pinto Dias, João Carlos
Bemfica, João Marcos
Silva-Nunes, João Paulo
Soares Barreto-Filho, José Augusto
Kerr Saraiva, José Francisco
Lannes-Vieira, Joseli
Menezes Oliveira, Joselina Luzia
V. Armaganijan, Luciana
Martins, Luiz Cláudio
C. Sangenis, Luiz Henrique
Barbosa, Marco Paulo
Almeida-Santos, Marcos Antônio
Simões, Marcos Vinicius
Shikanai-Yasuda, Maria Aparecida
Vieira Moreira, Maria da Consolação
Higuchi, Maria de Lourdes
Costa Monteiro, Maria Rita de Cássia
Felix Mediano, Mauro Felippe
Maia Lima, Mayara
T. Oliveira, Maykon
Moreira Dias Romano , Minna
Nitz, Nadjar
de Tarso Jorge Medeiros, Paulo
Vieira Alves, Renato
Alkmim Teixeira, Ricardo
Coury Pedrosa, Roberto
Aras, Roque
Morais Torres, Rosália
dos Santos Povoa, Rui Manoel
Rassi, Sérgio Gabriel
Salles Xavier, Sérgio
Marinho Martins Alves , Silvia
B. N. Tavares, Suelene
Lima Palmeira, Swamy
da Silva Junior, Telêmaco Luiz
da Rocha Rodrigues, Thiago
Madrini Junior, Vagner
Maia da Costa , Veruska
Dutra, Walderez
This guideline aimed to update the concepts and formulate the standards of conduct and scientific evidence that support them, regarding the diagnosis and treatment of the Cardiomyopathy of Chagas disease, with special emphasis on the rationality base that supported it.nbsp;
Chagas disease in the 21st century maintains an epidemiological pattern of endemicity in 21 Latin American countries. Researchers and managers from endemic and non-endemic countries point to the need to adopt comprehensive public health policies to effectively control the interhuman transmission of T. cruzi infection, and to obtain an optimized level of care for already infected individuals, focusing on diagnostic and therapeutic opportunistic opportunities.
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Pathogenic and pathophysiological mechanisms of the Cardiomyopathy of Chagas disease were revisited after in-depth updating and the notion that necrosis and fibrosis are stimulated by tissue parasitic persistence and adverse immune reaction, as fundamental mechanisms, assisted by autonomic and microvascular disorders, was well established. Some of them have recently formed potential targets of therapies.nbsp;
The natural history of the acute and chronic phases was reviewed, with enhancement for oral transmission, indeterminate form and chronic syndromes. Recent meta-analyses of observational studies have estimated the risk of evolution from acute and indeterminate forms and mortality after chronic cardiomyopathy. Therapeutic approaches applicable to individuals with Indeterminate form of Chagas disease were specifically addressed. All methods to detect structural and/or functional alterations with various cardiac imaging techniques were also reviewed, with recommendations for use in various clinical scenarios. Mortality risk stratification based on the Rassi score, with recent studies of its application, was complemented by methods that detect myocardial fibrosis.nbsp;
The current methodology for etiological diagnosis and the consequent implications of trypanonomic treatment deserved a comprehensive and in-depth approach. Also the treatment of patients at risk or with heart failure, arrhythmias and thromboembolic events, based on pharmacological and complementary resources, received special attention. Additional chapters supported the conducts applicable to several special contexts, including t. cruzi/HIV co-infection, risk during surgeries, in pregnant women, in the reactivation of infection after heart transplantation, and others.nbsp; nbsp;nbsp;
Finally, two chapters of great social significance, addressing the structuring of specialized services to care for individuals with the Cardiomyopathy of Chagas disease, and reviewing the concepts of severe heart disease and its medical-labor implications completed this guideline.
Esta diretriz teve como objetivo principal atualizar os conceitos e formular as normas de conduta e evidências científicas que as suportam, quanto ao diagnóstico e tratamento da CDC, com especial ênfase na base de racionalidade que a embasou.
A DC no século XXI mantém padrão epidemiológico de endemicidade em 21 países da América Latina. Investigadores e gestores de países endêmicos e não endêmicos indigitam a necessidade de se adotarem políticas abrangentes, de saúde pública, para controle eficaz da transmissão inter-humanos da infecção pelo T. cruzi, e obter-se nível otimizado de atendimento aos indivíduos já infectados, com foco em oportunização diagnóstica e terapêutica.
Mecanismos patogênicos e fisiopatológicos da CDC foram revisitados após atualização aprofundada e ficou bem consolidada a noção de que necrose e fibrose sejam estimuladas pela persistência parasitária tissular e reação imune adversa, como mecanismos fundamentais, coadjuvados por distúrbios autonômicos e microvasculares. Alguns deles recentemente constituíram alvos potenciais de terapêuticas.
A história natural das fases aguda e crônica foi revista, com realce para a transmissão oral, a forma indeterminada e as síndromes crônicas. Metanálises recentes de estudos observacionais estimaram o risco de evolução a partir das formas aguda e indeterminada e de mortalidade após instalação da cardiomiopatia crônica. Condutas terapêuticas aplicáveis aos indivíduos com a FIDC foram abordadas especificamente. Todos os métodos para detectar alterações estruturais e/ou funcionais com variadas técnicas de imageamento cardíaco também foram revisados, com recomendações de uso nos vários cenários clínicos. Estratificação de risco de mortalidade fundamentada no escore de Rassi, com estudos recentes de sua aplicação, foi complementada por métodos que detectam fibrose miocárdica.
A metodologia atual para diagnóstico etiológico e as consequentes implicações do tratamento tripanossomicida mereceram enfoque abrangente e aprofundado. Também o tratamento de pacientes em risco ou com insuficiência cardíaca, arritmias e eventos tromboembólicos, baseado em recursos farmacológicos e complementares, recebeu especial atenção. Capítulos suplementares subsidiaram as condutas aplicáveis a diversos contextos especiais, entre eles o da co-infecção por T. cruzi/HIV, risco durante cirurgias, em grávidas, na reativação da infecção após transplante cardíacos, e outros.nbsp;nbsp;nbsp;
Por fim, dois capítulos de grande significado social, abordando a estruturação de serviços especializados para atendimento aos indivíduos com a CDC, e revisando os conceitos de cardiopatia grave e suas implicações médico-trabalhistas completaram esta diretriz.nbsp;
4.
Bat species diversity from Reserva Ecológica de Guapiaçu, Rio de Janeiro, Brazil: a compilation of two decades of sampling
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Pires, Rayssa S.A.
; Soares, Gabriella
; Souza, Renan F.
; Teixeira, Tiago S.M.
; Monteiro-Alves, Priscila S.
; Lourenço, Elizabete C.
; Bergallo, Helena G.
; Costa, Luciana M.
; Santori, Ricardo T.
; Esbérard, Carlos E.L.
; Moratelli, Ricardo
; Novaes, Roberto L.M.
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ABSTRACT Reserva Ecológica de Guapiaçu (REGUA) is a private, protected area inside a remnant of the Atlantic Forest with high biodiversity. Although the bats of the reserve have been sampled for more than two decades, few studies have been published about them. Based on a compilation of data from several surveys, we present an updated list of the bat species there and compare it with surveys from other locations in the Atlantic Forest. From August 1998 to September 2021, at least 194 sampling nights were carried out at REGUA by different research groups from various institutions, totaling 448,092 m2.h of sampling. A total of 4,069 individuals were captured, belonging to 47 species and six families. Additionally, our results indicate that it is possible that some species that occur at REGUA have not been recorded yet. REGUA has the greatest number of bat species known for the Atlantic Forest. This most likely results from the fact that the reserve includes large areas of mature, continuous forest connected with other protected areas in the State of Rio de Janeiro. Another factor contributing to the high diversity of bat species at REGUA is that the area has been intensely sampled for many years. Given that the bat assemblage there appears to be a good proxy to ascertain the ecological patterns of biodiversity in well-preserved forests, we consider REGUA to be an important area for long-term ecological research. The basic knowledge about the ecological interactions of bats with different food resources and zoonotic microorganisms offers a unique opportunity to carry out research in several areas of knowledge, making it possible to address questions about bat assemblage structure, bat-parasite ecology, competition, niche partitioning, and other related studies.
5.
Molecular characterization of Toxoplasma gondii isolates from free-range chickens reveals new genotypes in Goiânia, Goiás, Brazil
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Rezende, Hanstter Hallison Alves
; Igreja, Jaqueline Ataíde Silva Lima da
; Gomes-Júnior, Antônio Roberto
; Melo, Jade de Oliveira
; Garcia, João Luís
; Martins, Felippe Danyel Cardoso
; Storchilo, Heloísa Ribeiro
; Gomes, Taynara Cristina
; Vinaud, Marina Clare
; Castro, Ana Maria de
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Revista Brasileira de Parasitologia Veterinária
- Métricas do periódico
Resumo O objetivo deste estudo foi avaliar as características genotípicas de Toxoplasma gondii isolados de galinhas caipiras da Região Metropolitana de Goiânia, Goiás, Região Centro Oeste do Brasil. A soroprevalência foi de 96% dos animais, determinada por hemaglutinação indireta. As amostras de cérebro e coração foram processadas através da digestão péptica para o bioensaio em camundongos. Os tecidos foram homogeneizados, e as amostras resultantes foram analisadas por reação em cadeia da polimerase (PCR), que possibilitou a detecção do DNA do parasito em 64% deles. Por meio do bioensaio em camundongos, foi possível detectar 15 isolados, 8 deles apresentando taquizoítos na lavagem peritoneal e 7 apresentando cistos cerebrais. A determinação dos genótipos de T. gondii foi realizada por PCR-RFLP com os seguintes marcadores: SAG1, SAG2, SAG3, BTUB, GRA6, c22-8, c29-2, L358, PK1, alt. SAG2, Apico e CS3. Foi possível definir 3 genótipos, incluindo o ToxoDB # 65 e dois deles ainda não foram descritos na literatura. Portanto, conclui-se que os isolados obtidos na região metropolitana de Goiânia apresentaram diversidade genética relativamente baixa.
Abstract The aim of this study was to evaluate the genotypic characteristics of Toxoplasma gondii isolated from free-range chickens in the metropolitan area of Goiânia, Goiás, in Brazil’s central-west region. The seroprevalence rate was found to be 96%, according to an indirect hemagglutination assay. Brain and heart samples were processed by peptic digestion for a mice bioassay. The tissues were homogenized and the resulting samples were subjected to polymerase chain reaction (PCR), which revealed that 64% of them contained the parasite's DNA. The mice bioassay revealed 15 isolates, 8 of them tachyzoites isolates from the peritoneal lavage and 7 from brain cysts. T. gondii genotypes were determined through PCR-RFLP, using the following markers: SAG1, SAG2, SAG3, BTUB, GRA6, c22-8, c29-2, L358, PK1, alt. SAG2, Apico and CS3. Three genotypes were identified, inclued ToxoDB #65, and the other two are not yet described in the literature. Hence, we conclude that the isolates obtained from the metropolitan area of Goiânia showed relatively low genetic diversity.
https://doi.org/10.1590/s1984-29612021029
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6.
Survey of anti-Toxoplasma gondii antibodies in wild mammals captured from Atlantic Forest fragments in Bahia, northeastern Brazil
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Brito Junior, Pedro de Alcântara
; Rocha, Josiane Moreira
; Silva, Caroline Araújo da
; Oliveira, Priscylla Marcelly Vilanova
; Correia, Joelande Esquivel
; Cruz, Luciara Alves da
; Sevá, Anaiá da Paixão
; Oliveira, Téo Veiga de
; Silva, Aristeu Vieira da
; Alvarez, Martín Roberto del Valle
; Albuquerque, George Rêgo
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Revista Brasileira de Parasitologia Veterinária
- Métricas do periódico
Resumo O objetivo deste trabalho foi investigar a frequência de anticorpos anti-Toxoplasma gondii presentes em mamíferos selvagens, capturados em fragmentos florestais do Estado da Bahia, Nordeste do Brasil. Um total de 368 indivíduos (246 roedores, 104 marsupiais e 18 morcegos) foram capturados, usando-se armadilhas de captura viva. Os soros foram testados pelo teste de aglutinação modificada, com ponto de corte na diluição de 1:25. A ocorrência total de anticorpos anti-T. gondii foi de 10,6% (39/368), sendo 16,3% (17/104) em marsupiais, 8,5% (21/246) em roedores e 5,5% (1/18) em morcegos. Os títulos variaram de 25 a 50 e 25 a 400, respectivamente, para roedores e marsupiais, e o título máximo em morcegos foi de 25. Este é o primeiro relato de anticorpos para T. gondii em algumas espécies de roedores (Thaptomys nigrita, Hylaeamys laticeps e Cerradomys subflavus), em marsupiais (Monodelphis americana, Gracilinanus microtarsus, Gracilinanus agilis e Marmosops incanus) e em quiróptero do gênero Rhynchonycteris. A presença de anticorpos anti–T. gondii em mamíferos selvagens demonstra a possibilidade desses animais como sentinelas da toxoplasmose, principalmente em regiões com alto efeito antropogênico.
Abstract The objective of this study was to investigate the frequency of antibodies to Toxoplasma gondii present in wild mammals that were trap captured in forest fragments in the State of Bahia, northeastern Brazil. A total of 368 individuals (246 rodents, 104 marsupials and 18 bats) were captured using live catch traps. Serum samples were tested using the modified agglutination test, with a cut-off point at 1:25 dilution. The total occurrence of antibodies to T. gondii was 10.6% (39/368), being 16.3% (17/104) in marsupials, 8.5% (21/246) in rodents, and 5.5% (1/18) in bats. Antibody titers varied between 25 and 50 for rodents, between 25 and 400 for marsupials, and were 25 for bats. This is the first report on antibodies to T. gondii in certain rodent species (Thaptomys nigrita, Hylaeamys laticeps, and Cerradomys subflavus), marsupial species (Monodelphis americana, Gracilinanus microtarsus, Gracilinanus agilis and Marmosops incanus), and bats of the genus Rhynchonycteris. The presence of antibodies to T. gondii in wild mammals demonstrates the possibility of these animals as sentinels of toxoplasmosis, especially on regions under high anthropogenic effect.
https://doi.org/10.1590/s1984-29612020083
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7.
Basic heel prick test: inclusion of screening, diagnosis and criteria for early confirmation of congenital infection by Toxoplasma gondii
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Storchilo, Heloisa Ribeiro
; Rezende, Hanstter Hallison Alves
; Gomes, Taynara Cristina
; Souza, Jéssica Yonara de
; Gomes Junior, Antonio Roberto
; Avelino, Mariza Martins
; Amaral, Waldemar Naves do
; Castro, Ana Maria de
.
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Revista do Instituto de Medicina Tropical de São Paulo
- Métricas do periódico
ABSTRACT Toxoplasma gondii can cross the placental barrier, causing fetal infection with potentially severe sequelae. The aim of this study was to evaluate whether the serological screening for toxoplasmosis should be included in the basic neonatal heel prick test in order to establish criteria for the confirmation and/or exclusion of the diagnosis of congenital infection in newborns treated at three public health units in the metropolitan region of Goiania, Goias State, Brazil. Blood samples were collected on filter paper from newborns and later, peripheral blood samples from the mothers and their respective children were obtained to confirm or exclude the diagnosis of suspected congenital infection, by means of an enzyme-linked immunosorbent assay (IgM and IgG) and a polymerase chain reaction assay. From a total of 1,159 blood samples collected on filter paper, 43.92% were reactive to IgG and 0.17% to anti-T. gondii IgM and IgG. One hundred and twenty-seven paired samples (mother and child) were collected following consensual protocols for peripheral blood collection. Results obtained from the filter paper and peripheral blood of the newborns were 90.55% concordant. A comparison of the mother and child blood test results showed agreement regarding the detection of IgG in 90.48% of the samples. The parasite DNA was detected in the peripheral blood of one child. In view of the results obtained in this study, the inclusion of the serological screening for toxoplasmosis in the newborn heel prick test proved to be effective for the early detection of congenital T. gondii infection.
https://doi.org/10.1590/s1678-9946201961030
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8.
Características físicas e anatômicas da madeira de Tectona grandis L.f. aos 7 anos de idade
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Gil, Júlia Lobo Ribeiro Anciotti
; Barboza, Frederico Severino
; Coneglian, Ademilson
; Sette Jr., Carlos Roberto
; Silva, Macksuel Fernades da
; Moraes, Mariana Dianese Alves de
.
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Este trabalho objetivou a caracterização física e anatômica da madeira de Tectona grandis obtida do desbaste, aos 7 anos. Foram selecionadas cinco árvores de plantio comercial e cortados discos de madeira em diferentes posições base-topo (0, 25, 50, 75 e 100% da altura total) para a determinação da densidade básica e obtidos corpos de prova em três posições radiais (0, 50 e 100% do raio), por disco de madeira, para a determinação das dimensões das fibras (comprimento, largura, diâmetro do lúmen e espessura da parede) e dos vasos (diâmetro, área ocupada e frequência). Foram cortados ainda toretes da região basal do tronco e obtidos corpos de prova para a determinação da retratibilidade da madeira (retração, inchamento e fator anisotrópico). A densidade média encontrada foi de 0,40 g.cm-3. Os valores médios encontrados de retração axial e radial, retratibilidade volumétrica e fator anisotrópico de retração são consideravelmente altos, indicando instabilidade dimensional da espécie. As avaliações das características físicas e anatômicas da madeira de desbaste de T. grandis, aos sete anos, indicaram que as estruturas formadas pelo câmbio ainda não atingiram a estabilização das suas dimensões, não sendo indicada para as aplicações da madeira adulta de Teca como na construção naval e movelaria.
This work aimed at the physical and anatomical characterization of Tectona grandis wood obtained from thinning, at 7 years. Five commercially planted trees were selected and wood discs were cut in different base-top positions (0, 25, 50, 75 and 100% of the total height) for the determination of wood basic density and samples were obtained in three radial positions to fibers (length, width, diameter of lumen and wall thickness) and vessels (diameter, occupied area and frequency) dimensions. Tortoises were also cut from the basal area of the trunk and test specimens were obtained to determine wood retractability (retraction, swelling and anisotropic factor). The mean wood density found was 0.40 g.cm-3. The mean values of axial and radial retraction, volumetric retractability and anisotropic retraction factor are considerably high, indicating dimensional instability of the species. The evaluations of the physical and anatomical characteristics of wood indicated that the structures formed by the cambium have not yet reached the stabilization of their dimensions, and it is not indicated for the applications of the adult Teak wood as in the construction naval and furniture.
https://doi.org/10.19084/RCA17149
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9.
Nursing infant with acquired toxoplasmosis in the first months of life – a case report
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Rezende, Hanstter Hallison Alves
; Storchilo, Heloísa Ribeiro
; Lima, Jaqueline Ataíde Silva
; Gomes Júnior, Antônio Roberto
; Gomes, Taynara Cristina
; Souza, Jéssica Yonara de
; Avelino, Mariza Martins
; Amaral, Waldemar Naves do
; Vinaud, Marina Clare
; Castro, Ana Maria de
.
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Revista do Instituto de Medicina Tropical de São Paulo
- Métricas do periódico
ABSTRACT Toxoplasmosis is caused by Toxoplasma gondii and the probability of this infection occurring in the first months of life is usually low because its transmission is related to eating habits. A 6-month-old nursing infant was diagnosed with acute toxoplasmosis, which was identified through anti- T. gondii IgA, IgM and low-avidity IgG serologic assays, polymerase chain reaction (PCR) and mouse bioassay test although its mother was seronegative. This serological divergence between mother and child led us to interview the mother regarding epidemiological factors. During this interview, she reported that she had given her 2-month-old baby a piece of undercooked beef to suck on. After some time, the baby presented fever and cervical lymphadenitis. This report emphasizes the importance of serological surveys of toxoplasmosis in nursing infants presenting with fever and lymphadenitis, in view of the possible acquisition of toxoplasmosis in the first months of life.
https://doi.org/10.1590/s1678-9946201759063
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10.
Microstructural chromosome reorganization in the genus Trichomycterus (Siluriformes: Trichomycteridae)
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Oliveira, Maria Lígia M. de
; Utsunomia, Ricardo
; Pansonato-Alves, José Carlos
; Scacchetti, Priscilla C.
; Primo, Cleberson C.
; Vicari, Marcelo R.
; Artoni, Roberto F.
; Centofante, Liano
; Moreira-Filho, Orlando
; Oliveira, Claudio
; Foresti, Fausto
.
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RESUMO Trichomycterus é um especioso gênero dentro de Trichomycterinae e exibe marcante diversidade cariotípica. No entanto, o conhecimento sobre sua estrutura genômica e localização de seqüências repetitivas ainda é restrita. Para um melhor conhecimento sobre a sua diversificação cariotípica, nós analisamos nove especies de Trichomycterus usando técnicas de citogenética clássica e molecular. Os resultados revelaram um conservado número diploide de 2n = 54 cromossomos em todas as espécies analisadas, embora diferentes marcações na distribuição da heterocromatina constitutiva tenham sido observadas. Além disso, enquanto o DNAr 18S mostrou um padrão de distribuição conservado, os sítios de DNAr 5S mostraram uma localização bastante diversa, considerando as espécies analisadas. Ambos os genes ribossomais foram co-localizados em todas as espécies, exceto em T. iheringi , sugerindo que a co-localização é provavelmente uma condição ancestral em Trichomycterus . Finalmente, três espécies analisadas mostraram cromossomos B heterocromáticos, reforçando uma intensa reoganização genômica ocorrendo em Trichomycterus . Nossos resultados mostraram que variações cromossômicas não estão restritas à diferenças na fórmula cariotípica, como proposto anteriormente, mas também às alterações a níveis de resolução estrutural.
Trichomycterus is a specious fish genus within Trichomycterinae and displays remarkable karyotype diversity. However, knowledge about their genomic structure and location of repetitive sequence is still limited. In order to better understand the karyotype diversification, we analyzed nine species of Trichomycterus using classical and molecular cytogenetic techniques. Results revealed a conserved diploid chromosome number of 2n=54 chromosomes in all analyzed species, although remarkable differences on the constitutive heterochromatin distribution were observed. In addition, while the 18S rDNA showed a conserved distribution pattern, the 5S rDNA sites showed a quite diverse location considering the analyzed species. Remarkably, both ribosomal genes were co-located in all species, except in T . iheringi , suggesting that co-localization is probably an ancestral condition in Trichomycterus . Finally, three analyzed species showed heterochromatic B chromosomes, reinforcing the intense genomic reorganization occurring in Trichomycterus . Our results showed that chromosomal variations are not restricted to differences in karyotype formula as previously proposed, but also to modifications on the microstructural level of resolution.
https://doi.org/10.1590/1982-0224-20150084
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11.
Characterization of biomasses from the north and northeast regions of Brazil for processes in biorefineries
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RAMBO, Magale Karine Diel
; ALEXANDRE, Gerso Pereira
; RAMBO, Michele Cristiane Diel
; ALVES, Aparecido Roberto
; GARCIA, Wokimar T.
; BARUQUE, Edmond
.
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Abstract In search for renewable energy sources, the Brazilian residual biomasses stand out due to their favorable physical and chemical properties, low cost, and their being less pollutant. Therefore, they are likely to be used in biorefineries in the production of chemical inputs to substitute fossil fuels. This substitution is possible due to the high contents of carbohydrates (>40%), low contents of extractives (<20%), ashes (<8%) and moisture (<8%) found in these residual biomasses. High calorific values of all residues also offer them the chance to be used in combustion. A principal components analysis (PCA) was performed for better understanding of the samples and their hysic-chemical properties. Thus, this study aimed to characterize biomasses from the north (babassu residues, such as mesocarp and endocarp; pequi and Brazil nut) and northeast (agave and coconut) regions of Brazil, in order to contribute to the preservation of the environment and strengthen the economy of the region.
https://doi.org/10.1590/1678-457X.6704
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12.
In vitro growth-inhibitory effect of Brazilian plants extracts against Paenibacillus larvae and toxicity in bees
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Piana, Mariana
; Brum, Thiele F. de
; Boligon, Aline A.
; Alves, Camilla F.S.
; Freitas, Robson B. de
; Nunes, Letícia T.
; Mossmann, Natalia J.
; Janovik, Vanessa
; Jesus, Roberta S.
; Vaucher, Rodrigo A.
; Santos, Roberto C.V.
; Athayde, Margareth L.
.
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Anais da Academia Brasileira de Ciências
- Métricas do periódico
Loque americana é uma grave doença de propagação mundial em abelhas causada pelo Paenibacillus larvae. Extratos de plantas são conhecidos por diminuir ou inibir o crescimento dessa bactéria. O objetivo deste estudo foi avaliar a atividade antimicrobiana dos extratos de Calendula. officinalis, Cariniana domestica, e Nasturtium officinale contra o P. larvae e avaliar a toxicidade dos extratos em abelhas. A atividade in vitro dos extratos contra P. larvae foi avaliada pelo método de microdiluição e as concentrações inibitórias mínimas (MICs) também foram determinadas. As concentrações utilizadas no ensaio de toxicidade foram estabelecidas baseadas nos valores de MIC e pelo método de aplicação por pulverização. O P. larvae foi suscetível aos extratos brutos de C. officinalis e N. officinale avaliados. Para a C. domestica, apenas as frações acetato de etila (EtAc) e butanólica (BuOH) tiveram atividade contra P. larvae. Análises de toxicidade em abelhas não mostraram toxidade para o extrato bruto de N. officinale e fração BuOH de C. domestica durante os 15 dias de tratamento, no entanto, ocorreram algumas mortes de abelhas durante os três primeiros dias de tratamento com C. officinalis e fração EtAc de C. domestica. Os resultados com essas espécies foram pela primeira vez descritos e mostraram que o extrato bruto de N. officinale e a fração BuOH de C. domestica ambos não apresentaram efeitos tóxicos nas concentrações testadas pelo método de aplicação por pulverização e podem ser uma alternativa útil para o tratamento ou prevenção da loque americana.
American foulbrood (AFB) is a serious worldwide spreading disease in bees caused by Paenibacillus larvae. Plants extracts are known to decrease or inhibit the growth of these bacteria. The purpose of this study was to evaluate the antimicrobial activity of Calendula. officinalis, Cariniana domestica, and Nasturtium officinale extracts against the P. larvae and to evaluate the toxicity of the extracts in bees. In vitro activity against P. larvae of the extracts was evaluated by micro dilution method and the minimal inhibitory concentrations (MICs) were also determined. The concentrations used in the toxicity test were established based on the MIC values and by the spraying application method. The P. larvae was susceptible to the evaluated crude extract of C. officinalis and N. officinale. To C. domestica, only the ethyl acetate (EtAc) fraction and n-butanol (BuOH) fractions had activity against P. larvae. Toxicity analysis in bees showed no toxicity for N. officinale crude extract and for C. domestica BuOH fraction during 15 days of treatment, however, some deaths of bees occurred during the first three days of treatment with C. officinalis and C. domestica EtAc fraction. The results with these species were firstly described and showed that N. officinale crude extract and C. domestica BuOH fraction both presented not toxic effects in the concentration tested by the spraying application method, and can be a useful alternative for treatment or prevention of AFB.
https://doi.org/10.1590/0001-3765201520140282
2171 downloads
13.
EFFECTS OF VITAMIN C SUPPLEMENTATION ON THE CHRONIC PHASE OF CHAGAS DISEASE
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MARIM, Ricardo Guimarães
; GUSMÃO, Alex Silva de
; CASTANHO, Roberto Esteves Pires
; DEMINICE, Rafael
; THEREZO, Altino Luiz Silva
; JORDÃO JÚNIOR, Alceu Afonso
; ASSIS, Marcos Renato de
; TAIPEIRO, Elane de Fátima
; MARTINS, Luciamare Perinetti Alves
.
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Revista do Instituto de Medicina Tropical de São Paulo
- Métricas do periódico
Introdução:Para verificar a eficácia da vitamina C em combater o insulto oxidativo causado pelo Trypanosoma cruzi durante a evolução da fase crônica da doença de Chagas, camundongos Swiss foram previamente infectados via intraperitoneal com 5.0 × 104 tripomastigotas da cepa QM1 de T. cruzi.Métodos:Camundongos foram suplementados com duas diferentes doses de vitamina C por 180 dias. Foram mensurados os níveis de peroxidação lipídica (indicado por substâncias reativas ao ácido tiobarbitúrico-TBARS), peróxido total, vitamina C, e glutationa reduzida no plasma e TBARS, peróxido total e vitamina C no miocárdio, e foi realizado o estudo histopatológico em coração, cólon e músculo esquelético.Resultados:Animais que receberam diariamente uma dosagem equivalente a 500 mg de vitamina C apresentaram aumento na produção de ROS e RNS no plasma e no miocárdio e maior grau de inflamação e necrose em músculo esquelético em comparação àqueles que receberam doses menores ou nenhuma vitamina C.Conclusão:Embora muitas pesquisas tenham mostrado o efeito antioxidante da vitamina C, nossos resultados mostraram que os animais que foram expostos a 500 mg de vitamina C apresentaram maior dano tecidual na fase crônica da doença de Chagas, provavelmente devido a ações paradoxais desta substância, onde nesta patologia, poderá agir como pró-oxidante ou pró-inflamatória.
Introduction:In order to examine the effectiveness of vitamin C (ascorbic acid) in combating the oxidative insult caused by Trypanosoma cruzi during the development of the chronic phase of Chagas disease, Swiss mice were infected intraperitoneally with 5.0 × 104 trypomastigotes of T. cruzi QM1strain.Methods:Mice were given supplements of two different doses of vitamin C for 180 days. Levels of lipid oxidation (as indicated by thiobarbituric acid reactive substances-TBARS), total peroxide, vitamin C, and reduced glutathione were measured in the plasma, TBARS, total peroxide and vitamin C were measured in the myocardium and histopathologic analysis was undertaken in heart, colon and skeletal muscle.Results:Animals that received a dose equivalent to 500 mg of vitamin C daily showed increased production of ROS in plasma and myocardium and a greater degree of inflammation and necrosis in skeletal muscles than those that received a lower dose or no vitamin C whatsoever.Conclusion:Although some research has shown the antioxidant effect of vitamin C, the results showed that animals subject to a 500 mg dose of vitamin C showed greater tissue damage in the chronic phase of Chagas disease, probably due to the paradoxical actions of the substance, which in this pathology, will have acted as a pro-oxidant or pro-inflammatory.
https://doi.org/10.1590/S0036-46652015000300011
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14.
Rhinosinusitis: evidence and experience. A summary
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Anselmo-Lima, Wilma T.
; Sakano, Eulália
; Tamashiro, Edwin
; Nunes, André Alencar Araripe
; Fernandes, Atílio Maximino
; Pereira, Elizabeth Araújo
; Ortiz, Érica
; Pinna, Fábio de Rezende
; Romano, Fabrizio Ricci
; Padua, Francini Grecco de Melo
; Mello Junior, João Ferreira de
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Brazilian Journal of Otorhinolaryngology
- Métricas do periódico
https://doi.org/10.1016/j.bjorl.2014.11.005
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15.
Growing knowledge: an overview of Seed Plant diversity in Brazil
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Zappi, Daniela C.
; Filardi, Fabiana L. Ranzato
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; Souza, Vinícius C.
; Walter, Bruno M.T.
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; Morim, Marli P.
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Resumo Um levantamento atualizado das plantas com sementes e análises relevantes acerca desta biodiversidade são apresentados. Este trabalho se iniciou em 2010 com a publicação do Catálogo de Plantas e Fungos e, desde então vem sendo atualizado por mais de 430 especialistas trabalhando online. O Brasil abriga atualmente 32.086 espécies nativas de Angiospermas e 23 espécies nativas de Gimnospermas e estes novos dados mostram um aumento de 3% da riqueza em relação a 2010. A Amazônia é o Domínio Fitogeográfico com o maior número de espécies de Gimnospermas, enquanto que a Floresta Atlântica possui a maior riqueza de Angiospermas. Houve um crescimento considerável no número de espécies e nas taxas de endemismo para a maioria dos Domínios (Caatinga, Cerrado, Floresta Atlântica, Pampa e Pantanal), com exceção da Amazônia que apresentou uma diminuição de 2,5% de endemicidade. Entretanto, a maior parte das plantas com sementes que ocorrem no Brasil (57,4%) é endêmica deste território. A proporção de formas de vida varia de acordo com os diferentes Domínios: árvores são mais expressivas na Amazônia e Floresta Atlântica do que nos outros biomas, ervas são dominantes no Pampa e as lianas apresentam riqueza expressiva na Amazônia, Floresta Atlântica e Pantanal. Este trabalho não só quantifica a biodiversidade brasileira, mas também indica as lacunas de conhecimento e o desafio a ser enfrentado para a conservação desta flora.
Abstract An updated inventory of Brazilian seed plants is presented and offers important insights into the country's biodiversity. This work started in 2010, with the publication of the Plants and Fungi Catalogue, and has been updated since by more than 430 specialists working online. Brazil is home to 32,086 native Angiosperms and 23 native Gymnosperms, showing an increase of 3% in its species richness in relation to 2010. The Amazon Rainforest is the richest Brazilian biome for Gymnosperms, while the Atlantic Rainforest is the richest one for Angiosperms. There was a considerable increment in the number of species and endemism rates for biomes, except for the Amazon that showed a decrease of 2.5% of recorded endemics. However, well over half of Brazillian seed plant species (57.4%) is endemic to this territory. The proportion of life-forms varies among different biomes: trees are more expressive in the Amazon and Atlantic Rainforest biomes while herbs predominate in the Pampa, and lianas are more expressive in the Amazon, Atlantic Rainforest, and Pantanal. This compilation serves not only to quantify Brazilian biodiversity, but also to highlight areas where there information is lacking and to provide a framework for the challenge faced in conserving Brazil's unique and diverse flora.
https://doi.org/10.1590/2175-7860201566411
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