2,170 research outputs found

    Movement syndromes of a Neotropical frugivorous bat inhabiting heterogeneous landscapes in Brazil

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    Background There is growing evidence that individuals within populations can vary in both habitat use and movement behavior, but it is still not clear how these two relate to each other. The aim of this study was to test if and how individual bats in a Stunira lilium population differ in their movement activity and preferences for landscape features in a correlated manner. Methods We collected data on movements of 27 individuals using radio telemetry. We fitted a heterogeneous-space diffusion model to the movement data in order to evaluate signals of movement variation among individuals. Results S. lilium individuals generally preferred open habitat with Solanum fruits, regularly switched between forest and open areas, and showed high site fidelity. Movement variation among individuals could be summarized in four movement syndromes: (1) average individuals, (2) forest specialists, (3) explorers which prefer Piper, and (4) open area specialists which prefer Solanum and Cecropia. Conclusions Individual preferences for landscape features plus food resource and movement activity were correlated, resulting in different movement syndromes. Individual variation in preferences for landscape elements and food resources highlight the importance of incorporating explicitly the interaction between landscape structure and individual heterogeneity in descriptions of animal movement.Peer reviewe

    Identification of SNPs for fatty acid content in soybean by the HRM technique

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    O objetivo deste trabalho foi identificar SNPs em genes associados ao conteúdo de ácidos graxos em soja e implementar a metodologia “high resolution melting” (HRM) para genotipagem desses SNPs. Os iniciadores HRM foram desenhados para discriminar os alelos SNPs em duas populações de mapeamento (RILs e F2) e seguiram o padrão esperado de segregação. Os SNPs do gene ABI associaram-se significativamente ao conteúdo de ácido esteárico (R2 = 12,14), e os do gene FAD3B, aos conteúdos de ácido oleico (R2 = 14,69) e linolênico (R2 = 10,62). A técnica de genotipagem dos SNPs por HRM é eficiente na discriminação das classes genotípicas.The objective of this work was to identify SNPs in genes associated with fatty acid content in soybean and to implement the high resolution melting (HRM) technique for SNP genotyping. HRM primers were designed to discriminate SNP alleles in two mapping populations (RILs and F2) and followed the expected pattern of segregation. The ABI gene SNPs were significantly associated with stearic acid content (R2 = 12.14), and the ones from the FAD3B gene, with oleic (R2 = 14.69) and linolenic acid (R2 = 10.62) contents. The technique of genotyping SNPs by HRM is efficient to discriminate genotype classes

    AMNÉSIA GLOBAL TRANSITÓRIA: EPIDEMIOLOGIA, FISIOPATOLOGIA, CLÍNICA E TERAPÊUTICA

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    A amnésia global transitória (AGT) é um quadro súbito de amnésia glo- bal, não acompanhada de outros déficits neurológicos, com duração de duas a 24 horas e cuja recuperação se dá espontaneamente. A incidência na população geral está estimada em 5-10 casos/100.000 pessoas/ano. Diferentes mecanismos fisiopatológicos, como fatores vasculares ou epiléticos, têm sido propostos para explicar a AGT, sendo consensual que haja acometimento transitório de regiões do hipocampo e do giro para-hipocampal. Além da amnésia anterógrada acompanhada por amnésia retrógra- da, o paciente apresenta desorientação (tempo/espaço), estando pre- servadas outras habilidades cognitivas, como memória semântica e capacidades visuo-construtivas. Esses déficits tendem a remitir após 24h, sendo o prognóstico favorável na maioria dos casos. O diagnós- tico diferencial de AGT é amplo e diversas condições clínicas, como eventos cérebro-vasculares, epilepsias, infecções e intoxicações po- dem mimetizá-lo, de modo que uma investigação clínica cuidadosa é imperativa. As recorrências não são frequentes nos quadros típicos. A AGT não requer tratamento específico, mas devem ser tratados fa- tores de risco cardiovascular eventualmente identificados durante a propedêutica de AGT. O clínico deve esclarecer o paciente a respeito do caráter benigno da AGT. Estudos com seguimento longitudinal dos pacientes são necessários para maior compreensão dos mecanismos fisiopatológicos da AGT e para melhor compreensão clínica e neuro- biológica dos déficits cognitivos apresentados por esses pacientes.

    EFEITOS DA VITRIFICAÇÃO NA PRESERVAÇÃO MORFOLÓGICA DO TECIDO TESTICULAR DE GATO DOMÉSTICO

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    This study aimed to evaluate the effect of domestic cats (Felis Catus) testicular parenchyma vitrification by Ovarian Tissue Cryosystem and conventional straw. Three (n=3) adult cats were submitted to routine orchiectomy. For the vitrification, the samples were exposed to equilibrium solution composed by RPMI, containing 20% of ethylene glycol (EG) and 0,1M of sucrose at 20 °C, for 3 minutes. Subsequently, exposed to vitrification solution, containing RPMI added to 40% of EG and 0,1 M of sucrose at 20 °C, for 2 minutes. After devitrification, 10 seminiferous tubules of each treatment were analyzed by histology assay. The viability of spermatic and Sertoli cells were analysed with light histology, as well as the seminiferous tubules morphometry. The vitrified groups were inferior to the control group in the morphologically integral cells analysis. However, the OTC was superior to straw in terms of morphological preservation of the germinative cells. Nevertheless, in morphometric analysis there was no statistical difference between the treatments (control, OTC and straw). Therefore, the vitrification in OTC method showed better results than vitrification in straw based on histological evaluation of germ and Sertoli cells of domestic cats.Este estudo teve como objetivo avaliar o efeito da vitrificação do parênquima testicular de gatos domésticos (Felis Catus) pelo criossistema de tecido ovariano e palha convencional. Três (n=3) gatos adultos foram submetidos à orquiectomia de rotina. Para a vitrificação, as amostras foram expostas a solução de equilíbrio composta por RPMI, contendo 20% de etilenoglicol (EG) e 0,1M de sacarose a 20 °C, por 3 minutos. Posteriormente, expostos à solução de vitrificação, contendo RPMI adicionado a 40% de EG e 0,1 M de sacarose a 20 °C, por 2 minutos. Após a desvitrificação, 10 túbulos seminíferos de cada tratamento foram analisados por ensaio histológico. A viabilidade das células espermáticas e de Sertoli foram analisadas com histologia de luz, bem como a morfometria dos túbulos seminíferos. Os grupos vitrificados foram inferiores ao grupo controle na análise de células morfologicamente integrais. No entanto, o OTC foi superior à palha em termos de preservação morfológica das células germinativas. No entanto, na análise morfométrica não houve diferença estatística entre os tratamentos (controle, COT e palha). Portanto, a vitrificação em OTC apresentou melhores resultados do que a vitrificação em palha com base na avaliação histológica de células germinativas e de Sertoli de gatos domésticos

    ANALYSIS OF THE CLIMATOLOGICAL WATER BALANCE OF THE WATERSHAD ALTO CAMAQUÃ

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    This work was carried out in the sub-basin called Alto Camaquã, belonging to the Pampa Biome in a region considered stable and of high importance for the conservation of biodiversity. The main economic and socio-cultural activity of the region is family farming, which is also fundamental for the maintenance of the biome due to the coexistence of the field / livestock. In order to understand the behavior of the basin in relation to the months of major deficits and water surpluses, two different methods of spatialization of the results were tested. The main difference between the two methods lies in the determination of CAD. The BHC was calculated for three different rain behaviors: Normal Year; Dry Years; and Rainy Year. The methodologies studied demonstrated great efficiency in the calculation of BHC. The differences that occur in the both methods do not modify the general behavior of the basin and, therefore, do not cause significant differences in what concerns deficits and water excess. However, the second method is more efficient for regions with higher variability of the soil use. The results show that family ranchers suffer from many months of water deficit

    Avaliação das salas de imunização de uma capital do nordeste do Brasil

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    The evaluation by the National Program of the different quality rooms of the determined protocols (PNI) makes an assessment of the various factors that can interfere with the local asymbiological vaccine. With this, it is possible to obtain satisfactory results and to reorder the execution and offer of quality services. The present study aimed to evaluate the immunization rooms in the city of São Luís, Maranhão. This is an evaluative study carried out in 65 Municipal Vaccine rooms, carried out in São Paulo, in a Supervision Room (PAISSV). Most rooms were considered good (58.6%), but none were ideal. The most impacting were found in the room temperature that was not between 18ºC to 20ºC (67.69%), data and opening time of the bottle were not recorded (75.38%), control cards were not organized by return data (70.77%), the search for counterfeiters was not carried out (60.00%), there was no distribution box so as not to turn off the circuit breaker in the electrical search room (78.46%) and there was no active a preventive maintenance and/or correction program for the refrigerator (64.62%). Public vaccination rooms in São Luís were performed as good. Thus, it is necessary to supervise, monitor and evaluate professionals, with permanent education strategies.A avaliação das salas de vacina se faz necessária pelos diversos fatores que podem interferir na qualidade dos imunobiológicos presentes no local e assim comprometer sua eficácia, por meio da identificação de problemas que comprometem a concretização dos protocolos determinados pelo Programa Nacional de Imunizações (PNI). Com isso, é possível obter resultados satisfatórios e reordenar a execução e a oferta de serviços de qualidade. O presente estudo objetivou avaliar as salas de imunização da cidade de São Luís, Maranhão. Trata-se de estudo avaliativo realizado no município de São Luís – MA, em 65 salas que administram vacinas através do Instrumento de Supervisão em Sala de Vacinação (PAISSV). Nenhuma sala foi considerada como ideal, mas 58,46% obtiveram o escore bom. Contudo, 67,69% das salas apresentaram temperatura diferente de 18ºC a 20ºC, 75,38% não realizava o registro de data e hora de abertura do frasco, 70,77% não organizava os cartões de controle por data de retorno, em 60,00% não era realizada a busca ativa de faltosos, o informativo não desligar o disjuntor na caixa de distribuição elétrica não estava presente em 78,46% e o programa de manutenção preventiva e/ou corretiva para o refrigerador era inexistente em 64,62%. As salas de vacinas dos serviços de saúde pública de São Luís foram consideradas como boas, porém não exime a necessidade de fiscalização e avaliação, juntamente com estratégias de qualificação dos profissionais

    ATLANTIC ‐ PRIMATES : a dataset of communities and occurrences of primates in the Atlantic Forests of South America

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    Primates play an important role in ecosystem functioning and offer critical insights into human evolution, biology, behavior, and emerging infectious diseases. There are 26 primate species in the Atlantic Forests of South America, 19 of them endemic. We compiled a dataset of 5,472 georeferenced locations of 26 native and 1 introduced primate species, as hybrids in the genera Callithrix and Alouatta. The dataset includes 700 primate communities, 8,121 single species occurrences and 714 estimates of primate population sizes, covering most natural forest types of the tropical and subtropical Atlantic Forest of Brazil, Paraguay and Argentina and some other biomes. On average, primate communities of the Atlantic Forest harbor 2 ± 1 species (range = 1–6). However, about 40% of primate communities contain only one species. Alouatta guariba (N = 2,188 records) and Sapajus nigritus (N = 1,127) were the species with the most records. Callicebus barbarabrownae (N = 35), Leontopithecus caissara (N = 38), and Sapajus libidinosus (N = 41) were the species with the least records. Recorded primate densities varied from 0.004 individuals/km2 (Alouatta guariba at Fragmento do Bugre, Paraná, Brazil) to 400 individuals/km2 (Alouatta caraya in Santiago, Rio Grande do Sul, Brazil). Our dataset reflects disparity between the numerous primate census conducted in the Atlantic Forest, in contrast to the scarcity of estimates of population sizes and densities. With these data, researchers can develop different macroecological and regional level studies, focusing on communities, populations, species co‐occurrence and distribution patterns. Moreover, the data can also be used to assess the consequences of fragmentation, defaunation, and disease outbreaks on different ecological processes, such as trophic cascades, species invasion or extinction, and community dynamics. There are no copyright restrictions. Please cite this Data Paper when the data are used in publications. We also request that researchers and teachers inform us of how they are using the data.Fil: Culot, Laurence. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Pereira, Lucas Augusto. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Agostini, Ilaria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Universidad Nacional de Misiones. Instituto de Biología Subtropical; Argentina. Centro de Investigaciones del Bosque Atlántico; ArgentinaFil: de Almeida, Marco Antônio Barreto. Pontificia Universidade Católica do Rio Grande do Sul; BrasilFil: Alves, Rafael Souza Cruz. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Baldovino, María Celia. Centro de Investigaciones del Bosque Atlántico; Argentina. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo. Instituto Miguel Lillo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán; ArgentinaFil: Di Bitetti, Mario Santiago. Centro de Investigaciones del Bosque Atlántico; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Puerto Iguazú | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Puerto Iguazú; ArgentinaFil: Oklander, Luciana Inés. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Nordeste. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Puerto Iguazú | Universidad Nacional de Misiones. Instituto de Biología Subtropical. Instituto de Biología Subtropical - Nodo Puerto Iguazú; ArgentinaFil: Holzmann, Ingrid. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Salta. Instituto de Bio y Geociencias del NOA. Universidad Nacional de Salta. Facultad de Ciencias Naturales. Museo de Ciencias Naturales. Instituto de Bio y Geociencias del NOA; ArgentinaFil: Dums, Marcos. RUMO S.A. Licenciamento Ambiental; BrasilFil: Lombardi, Pryscilla Moura. RUMO S.A. Licenciamento Ambiental; BrasilFil: Bonikowski, Renata Twardowsky Ramalho. RUMO S.A. Licenciamento Ambiental; BrasilFil: Age, Stéfani Gabrieli. RUMO S.A. Licenciamento Ambiental; BrasilFil: Souza Alves, João Pedro. Universidade Federal de Pernambuco; BrasilFil: Chagas, Renata. Universidade Federal da Paraíba; BrasilFil: da Cunha, Rogério Grassetto Teixeira. Universidade Federal de Alfenas; BrasilFil: Valença Montenegro, Monica Mafra. Centro Nacional de Pesquisa e Conservaçao de Primates Brasileiros; BrasilFil: Ludwig, Gabriela. Centro Nacional de Pesquisa e Conservaçao de Primates Brasileiros; BrasilFil: Jerusalinsky, Leandro. Centro Nacional de Pesquisa e Conservaçao de Primates Brasileiros; BrasilFil: Buss, Gerson. Centro Nacional de Pesquisa e Conservaçao de Primates Brasileiros; BrasilFil: de Azevedo, Renata Bocorny. Centro Nacional de Pesquisa e Conservaçao de Primates Brasileiros; BrasilFil: Filho, Roberio Freire. Universidade Federal de Pernambuco; BrasilFil: Bufalo, Felipe. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Milhe, Louis. Université D'Avignon et des Pays du Vaucluse; FranciaFil: Santos, Mayara Mulato dos. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Sepulvida, Raíssa. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Ferraz, Daniel da Silva. Universidade do Estado de Minas Gerais; BrasilFil: Faria, Michel Barros. Universidade do Estado de Minas Gerais; BrasilFil: Ribeiro, Milton Cezar. Universidade Estadual Paulista Julio de Mesquita Filho; BrasilFil: Galetti, Mauro. Universidade Estadual Paulista Julio de Mesquita Filho; Brasi

    A SARS-CoV-2 Negative Antigen Rapid Diagnostic in RT-qPCR Positive Samples Correlates With a Low Likelihood of Infectious Viruses in the Nasopharynx

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    Severe acute respiratory syndrome-related coronavirus (SARS-CoV-2) transmission occurs even among fully vaccinated individuals; thus, prompt identification of infected patients is central to control viral circulation. Antigen rapid diagnostic tests (Ag-RDTs) are highly specific, but sensitivity is variable. Discordant RT-qPCR vs. Ag-RDT results are reported, raising the question of whether negative Ag-RDT in positive RT-qPCR samples could imply the absence of infectious viruses. To study the relationship between negative Ag-RDT results with virological, molecular, and serological parameters, we selected a cross-sectional and a follow-up dataset and analyzed virus culture, subgenomic RNA quantification, and sequencing to determine infectious viruses and mutations. We demonstrated that RT-qPCR positive while SARS-CoV-2 Ag-RDT negative discordant results correlate with the absence of infectious virus in nasopharyngeal samples. A decrease in sgRNA detection together with an expected increase in detectable anti-S and anti-N IgGs was also verified in these samples. The data clearly demonstrate that a negative Ag-RDT sample is less likely to harbor infectious SARS-CoV-2 and, consequently, has a lower transmissible potential
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