1,695 research outputs found

    Caracterização clínica e laboratorial de gatos considerados suspeitos de mycoplasma haemofelis

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    Orientação : Joana de Oliveira ; co-orientação : Odete AlmeidaA Mycoplasma haemofelis é uma bactéria gram-negativa que infecta gatos domésticos ou selvagens. Os animais que recuperam da infecção aguda permanecem cronicamente infectados durante meses, anos ou até mesmo durante toda a sua vida, não apresentando quaisquer sinais clínicos. Neves (2013) testou em Portugal 58 gatos para Mhf (sem sinais clínicos compatíveis com infecção por esta bactéria) e verificou uma prevalência de 20.7%, tendo sido utilizada a técnica de PCR nas amostras sanguíneas. Este estudo retrospectivo teve como objectivo geral investigar a presença de diferenças entre o perfil clínico, hematológico e bioquímico e possíveis factores de risco em animais clinicamente suspeitos de infecção por Mycoplasma haemofelis, que foram consultados no Hospital Veterinário CASVET, Parede. A pesquisa do agente foi realizada pela técnica de PCR em tempo real (RT-PCR) em amostras sanguíneas. Verificou-se presença estatisticamente significativa de trombocitopenia em animais positivos para Mycoplasma haemofelis [Mhf (+)]. Por outro lado, estes animais cujo diagnóstico foi positivo apresentaram normoproteinémia estatisticamente significativa em relação aos animais Mhf (-) que apresentavam hiperproteinémia. Não se encontraram quaisquer outras diferenças para os restantes parâmetros hematológicos, bioquímicos e de caracterização dos animais não existindo também relação estatística entre a presença de anemia nos animais infectados e o seu estado retroviral. Este trabalho é muito sugestivo da elevada prevalência da infecção por Mhf na clínica em estudo, sendo muitos animais portadores assintomáticos. Deste modo, a pesquisa do Mhf em contexto clínico deverá ter em conta pelo menos mais do que um dos sinais clínicos, uma vez que a maioria dos mesmos não são patognomónicos. Outros testes de diagnóstico antes da realização do teste de PCR são imprescindíveis para uma melhor detecção de animais com a fase aguda da doença.Mycoplasma haemofelis is a gram-negative bacteria which infects both domestic and wild cats. Animals that recover from acute infection remain chronically infected for months, years or even throughout his life, showing no clinical signs. Neves, 2013, tested in Portugal 58 cats for Mhf (without clinical signs consistent with infection by this bacteria) and found a prevalence of 20.7%, having been used PCR in blood samples. This retrospective study had as a general objective investigate the presence of differences between the clinical, hematological and biochemical profile and possible risk factors for animals clinically suspected of infection with Mycoplasma haemofelis, who were consulted at CASVET, a veterinary hospital in Parede, Portugal. Search agent was performed by real time PCR (RT- PCR) in blood samples. There was a statistically significant presence of thrombocytopenia in animals positive for Mycoplasma haemofelis [Mhf (+)]. Moreover, this animals whose diagnosis was positive showed a statistically significant normproteinaemia compared to [Mhf (-)] that had hyperproteinemia. They did not match any other differences for the remaining hematological and biochemical parameters and characterization of the animals. There was also no statistical relationship between the presence of anemia and the retroviral state. This work is very suggestive of the high prevalence of infection by Mhf in CASVET, with various animals being asymptomatic carriers. Mhf research in the clinical setting should take into account at least more than one clinical sign, once most of them are not pathognomonic. Other diagnostic tests prior to the PCR testing are vital for improved detection of animals in the acute phase of the disease

    Establishment of a somatic embryogenesis protocol for in vitro olive plant propagation – a focus on the valorization of the Portuguese cv. 'Galega vulgar'.

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    Due to its capacity to regenerate plants from a single cell, in vitro somatic embryogenesis, apart from being an efficient plant propagation system is also fundamental to assist plant breeding by genetic transformation, and fundamental research for validation of data coming from different omics. The establishment of efficient protocols for plant regeneration through somatic embryogenesis must be taken as the first achievement on the successful regeneration of a transgenic plant. Focused on the validation of transcriptomic data, achieved in the frame of a running project (OLEAVALOR) and in the potential use of genetic engineering methodologies to further assist olive breeding programs, a research work has been carried out to establish an efficient somatic embryogenesis protocol for the Portuguese olive cv. 'Galega vulgar'. This cultivar is characterized by high quality olive oils and is still today the most representative of the traditional Portuguese olive orchards. However, it also presents several agronomic problems that highly limit its use in modern high density olive orchards, being mandatory the establishment of a breeding line for its valorisation. This study aimed on taking a first step in this direction, seeking to obtain an efficient somatic embryogenesis protocol that could later be used in breeding programs using genetic engineering approaches (e.g. cisgenesis, CRISPR/Cas9). Leaf petioles, taken from in vitro growing plantlets, as well as radicles and cotyledons, taken from mature seeds, were used as initial explants. The culture media composition and culture conditions were adapted from available reports (Rugini and Caricato 1995; Rugini and Silvestri 2016; Cerezo et al. 2011). A protocol for plant regeneration via somatic embryogenesis was achieved when mature zygotic embryos were used as initial explants. From the same initial explants, repetitive somatic embryogenesis was also successfully established, making available plant material for genetic transformation experiments. Regarding the use of leaf petioles from mature tissues, despite the formation of calli and the neoformation of leaf structures, it was not possible to obtain somatic embryos. Nevertheless, the results allow to foresee encouraging perspectives for further development of a protocol based on the use of adult plant material as initial explant

    Gestão de imobilizados

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    Trabalho de projecto de mestrado em Engenharia Informática (Arquitectura, Sistemas e Redes de Computadores), apresentado à Universidade de Lisboa, através da Faculdade de Ciências, 2009Este documento descreve o trabalho realizado na Capgemini Portugal – Serviços de Consultoria e Informática, no âmbito da disciplina Projecto em Engenharia Informática (PEI). O projecto teve a duração de nove meses e decorreu no Departamento de Soluções ERP, no qual estou inserida desde Julho de 2007. Para este projecto foi planeado o desenvolvimento de uma aplicação de Gestão de Imobilizado designada de SENDYS®© Imobilizado que é um módulo do SENDYS®©. O SENDYS®© é um software de gestão criado para as diferentes áreas empresariais, que oferece a automatização e integração dos processos e o armazenamento de toda a informação de negócio num único repositório de dados. O objectivo principal deste projecto foi migrar a aplicação de Gestão de Imobilizado da plataforma DOS, desenvolvida em Clipper, para a plataforma Win32, em VB6 e SQL Server 2000/2005, integrando uma equipa de desenvolvimento. Para que o objectivo principal seja cumprido, foram realizadas as seguintes tarefas: Com base no modelo lógico, escrever scripts DDL para criar e modificar o schema da base de dados; Com base em mapas de equivalência, escrever scripts DML para migrar os dados da plataforma actual (ficheiros dBase) para a base de dados MS SQL Server 2000; Com base em diagramas conceber e implementar as funcionalidades necessárias ao funcionamento da aplicação em qualquer uma das camadas do sistema (dados, negócio e apresentação), com recurso a VB6, Excel VBA, COM e IDL. A aplicação foi desenvolvida com o apoio das ferramentas Microsoft Visual Studio e Microsoft SQL Server.This document describes the work done at Capgemini Portugal – Serviços de Consultoria e Informática, as part of the course in Computer Engineering Project (PEI). The Project had duration of nine months and held in the Soluções ERP Department, which I joined in July 2007. Its objective is the migration of the application “Gestão de Imobilizado” (an asset management software application) from the original DOS-based program to the Windows platform. This will be done by re-architecting and rewriting the original application (written in Clipper code) to Microsoft’s VB 6 and SQL Server 2000 (which is the language and backend database used to develop the SENDYS®© ERP which will be “receiving” the new application). For that, the following tasks must be completed: Write T-SQL DDL scripts which will be used to create and modify the database schema; Write T-SQL DML scripts to migrate data from the current platform (dBase files) to the target Microsoft SQL Server 2000 database; Port the original functionality to the new application (which has a layered architecture) using VB 6, Excel VBA, COM and IDL. The application was developed with support of the tools Microsoft Visual Studio 98, Microsoft SQL Server 2000 and Microsoft Excel 2000

    Homenagem ao nosso Editor Professor Oswaldo Paulo Forattini

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    Methylobacterium sp. 2A is a plant growth-promoting rhizobacteria that has the potential to improve potato crop yield under adverse conditions

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    A Gram-negative pink-pigmented bacillus (named 2A) was isolated from Solanum tuberosum L. cv. Desirée plants that were strikingly more developed, presented increased root hair density, and higher biomass than other potato lines of the same age. The 16S ribosomal DNA sequence, used for comparative gene sequence analysis, indicated that strain 2A belongs to the genus Methylobacterium. Nucleotide identity between Methylobacterium sp. 2A sequenced genome and the rest of the species that belong to the genus suggested that this species has not been described so far. In vitro, potato plants inoculated with Methylobacterium sp. 2A had a better performance when grown under 50 mM NaCl or when infected with Phytophthora infestans. We inoculated Methylobacterium sp. 2A in Arabidopsis thaliana roots and exposed these plants to salt stress (75 mM NaCl). Methylobacterium sp. 2A-inoculated plants, grown in control or salt stress conditions, displayed a higher density of lateral roots (p < 0.05) compared to noninoculated plants. Moreover, under salt stress, they presented a higher number of leaves and larger rosette diameter. In dual confrontation assays, Methylobacterium sp. 2A displayed biocontrol activity against P. infestans, Botrytis cinerea, and Fusarium graminearum, but not against Rhizoctonia solani, and Pythium dissotocum. In addition, we observed that Methylobacterium sp. 2A diminished the size of necrotic lesions and reduced chlorosis when greenhouse potato plants were infected with P. infestans. Methylobacterium sp. 2A produces indole acetic acid, solubilizes mineral phosphate and is able to grow in a N2 free medium. Whole-genome sequencing revealed metabolic pathways associated with its plant growth promoter capacity. Our results suggest that Methylobacterium sp. 2A is a plant growth-promoting rhizobacteria (PGPR) that can alleviate salt stress, and restricts P. infestans infection in potato plants, emerging as a potential strategy to improve crop management.Fil: Grossi, Cecilia Eugenia María. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; ArgentinaFil: Fantino, Elisa Inés. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; ArgentinaFil: Serral, Federico. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Calculo. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Calculo; ArgentinaFil: Zawoznik, Myriam Sara. Universidad de Buenos Aires. Facultad de Farmacia y Bioquímica. Departamento de Química Biológica. Cátedra de Química Biológica Vegetal; ArgentinaFil: Fernández Do Porto, Darío Augusto. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Calculo. - Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Calculo; ArgentinaFil: Ulloa, Rita Maria. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Investigaciones en Ingeniería Genética y Biología Molecular "Dr. Héctor N. Torres"; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Biológica; Argentin

    HEMANGIOMA CAVERNOSO DE VEIA RENAL – RESSECÇÃO E ENXERTO COM VEIA JUGULAR INTERNA

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    Cavernous hemangioma of the renal vein is an exceptionally rare condition characterized by the presence of a vascular tumor within the renal vein. Limited information is available regarding its clinical features, prevalence, and treatment options. We present the case of a 67-year-old male with gastric adenocarcinoma who underwent staging imaging revealing an incidental finding of a neoformation within the left renal vein. The patient underwent radical total gastrectomy with excision of the renal vein lesion, followed by reconstruction using the internal jugular vein. Histopathological examination confirmed tubular gastric adenocarcinoma and a cavernous hemangioma involving the renal vein wall. The patient was followed in the medical oncology consultation for gastric cancer. At the 10-month follow-up, the patient remains clinically well, with no evidence of recurrence of either the gastric adenocarcinoma or renal vein hemangioma cavernosum. This case highlights the extremely rare incidental discovery of a renal vein hemangioma cavernosum during gastric cancer staging. Surgical excision with vein reconstruction proved to be a safe and effective treatment option. Further research is needed to establish optimal management strategies for this rare condition.O hemangioma cavernoso da veia renal é uma condição excepcionalmente rara caracterizada pela presença de um tumor vascular no interior da veia renal. Informações limitadas estão disponíveis sobre suas características clínicas, prevalência e opções de tratamento. Apresentamos o caso de um homem de 67 anos com adenocarcinoma gástrico que foi submetido a exames de imagem que revelaram achado incidental de neoformação na veia renal esquerda. O doente foi submetido à gastrectomia total radical com excisão da lesão da veia renal, seguida de reconstrução com veia jugular interna. O exame histopatológico confirmou adenocarcinoma gástrico tubular e hemangioma cavernoso envolvendo a parede da veia renal. O doente foi acompanhado na consulta médica de oncologia por cancro gástrico, No seguimento de 10 meses, o doente permanece clinicamente bem, sem evidência de recorrência do adenocarcinoma gástrico ou do hemangioma cavernoso da veia renal. Este caso destaca a descoberta incidental extremamente rara de um hemangioma cavernoso da veia renal durante o estadiamento do câncer gástrico. A excisão cirúrgica com reconstrução venosa mostrou-se uma opção de tratamento segura e eficaz. Mais pesquisas são necessárias para estabelecer estratégias de manejo ideais para esta condição rara
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