3 research outputs found

    A ativação endotelial nos pacientes submetidos à quimioterapia em alta dose para transplante de medula óssea

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    Introduction: the objective of this Study is to evaluate the relationship between inflammatory markers and other factors that influence platelet consumption and platelet transfusion increment, as well as the presence of thromboembolic events in patients submitted to high-dose chemotherapy regimens for Bone Marrow Transplantation. Method: prospective analysis of patients, including 25 patients who underwent autologous and allogenic Bone Marrow Transplantation. The patients were evaluated in relation to previous radiotherapy, CD34+ cell count, period of neutropenia, body mass index, ferritin, C-reactive protein, relating these factors to the number of platelet transfusions, platelet refractoriness and vascular events such as sinusoidal obstruction syndrome and Engraftment Syndrome. Results: only body mass index > 25 Kg/m2 of the studied variables presented a statistically significant value (p = 0.003) in relation to the lower rates of platelet transfusion. For platelet refractoriness and/or vascular events none of the variables was statistically significant. Conclusion: the conditions found in the three cases of platelet refractoriness and in the two cases of vascular events have characteristics similar to those described in the literature. We agree with preexisting data reported in the literature, where patients with high BMI have lower need of platelets transfusion.Introdução: o dano endotelial microvascular é um processo bem reconhecido como complicação do transplante de células tronco hematopoiéticas, os mecanismos dessa desordem ainda são pouco conhecidos. Diante desse cenário objetiva-se avaliar a relação entre marcadores inflamatórios e outros fatores que influenciam no consumo de plaquetas e o rendimento transfusional plaquetário, bem como a presença de eventos trombo embólicos e/ou vasculares em pacientes submetidos a condicionamento com quimioterapia em altas doses para transplante de células tronco hematopoiéticas. Método: análise prospectiva de pacientes, onde foram incluídos 25 pacientes que foram submetidos ao transplante de células tronco hematopoiéticas autólogo e alogênico. Os pacientes foram avaliados em relação a radioterapia previa, contagem de células CD 34 +, período de neutropenia, índice de massas corpórea, ferritina, Proteína C reativa relacionando esses fatores ao número de transfusões de plaquetas, refratariedade plaquetária e eventos vasculares como síndrome da obstrução sinusoidal e síndrome da enxertia. Resultado: das variáveis estudadas, apenas o IMC > 25 Kg/m2, apresentou um valor estatisticamente significativo (p = 0,003) em relação a menor necessidade transfusional de concentrado de plaquetas. Para a refratariedade plaquetária e/ou eventos vasculares nenhuma das variáveis foi estatisticamente significativa. Conclusão: pacientes com índice de massa corporal elevado apresentam menor necessidade transfusional de plaquetas. As condições encontradas nos três casos de refratariedade plaquetária e nos dois casos de eventos vasculares apresentam características semelhantes as descritas na literatura. Estudos relacionados à ativação endotelial e seus efeitos sobre o organismo devem ser estimulados

    Prevalência e resistência a antibióticos de Stenotrophomonas maltophilia em amostras clínicas: estudo epidemiológico de 10 anos

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    Introduction: Stenotrophomonas maltophilia is an emerging opportunistic pathogen, mainly associated with nosocomial infections. Therapeutic options for the treatment of S. maltophilia infections are limited because of their resistance to a wide variety of antibiotics. Objective: To investigate the prevalence and antibiotic resistance of isolates identified as S. maltophilia from hospitalized patients recovered from a clinical laboratory located in Juiz de Fora - Minas Gerais, as well as to analyze epidemiological data of these patients. Materials and Methods: Consecutive, non duplicate isolates of S. maltophilia (n=58) for the 10-year period were analyzed. All samples were identified using the automated Vitek 2® Compact system (BioMérieux/France). Antibiotic resistance standards were performed using the disk diffusion method. Patient records were evaluated and data such as age, gender, clinical specimen, and in-hospital death rate attributed to S. maltophilia infection were also analyzed. Results: From a total of 39,547 (100%) clinical specimens analyzed, 58 (0,14%) unreplicated isolates were identified as S. maltophilia. 70,6% of S. maltophilia isolates were isolated from tracheal secretion and 15,5% from blood. All samples were sensitive in vitro to the antibiotics tested. In-hospital death frequency associated with S. maltophilia infection was 44,7%. Individuals from a wide age range (0-100 years) were affected by S. maltophilia infection, with females being the most prevalent (56,9%). Conclusion: Pneumonia and Bacteremia were the most frequent clinical syndromes caused by S. maltophila. A moderate mortality rate associated with S. maltophila infections was observed, despite the high sensitivity in vitro to the antibiotics tested. New studies are necessary in order to generate data and information that may be useful in early diagnosis, management and correct treatment of infections associated with S. maltophila, especially those with a profile of antibiotic resistance.Introdução: Stenotrophomonas maltophilia é um patógeno oportunista emergente, associado, principalmente, a infecções nosocomiais. As opções terapêuticas para o tratamento de infecções por S. maltophilia são limitadas, devido a sua resistência a uma grande variedade de antibióticos.Objetivo: investigar a prevalência e a resistência aos antibióticos de isolados identificados como S. maltophilia, a partir de pacientes hospitalizados, recuperados em um laboratório clínico, localizado em Juiz de Fora – Minas Gerais, bem como analisar dados epidemiológicos destes pacientes.Materiais e Métodos: Isolados consecutivos, não duplicados de S. maltophilia (n=58),referentes ao período de 10 anos foram analisados. Todas as amostras foram identificadas utilizando o sistema automatizado Vitek 2® Compact (BioMérieux/França). Os padrões de resistência aos antibióticos foram realizados utilizando o método de disco difusão. Os prontuários dos pacientes foram avaliados e dados como idade, sexo, espécime clínico, bem como índice de óbito intra-hospitalar atribuído à infecção por S. maltophilia foi igualmente analisado. Resultados: De um total de 39.547 (100%) espécimes clínicos analisados, 58 (0,14%) isolados não replicados foram identificados como S. maltophilia. 70,6% dos isolados de S. maltophilia foram isolados de secreção traqueal e 15,5% de sangue.Todas as amostras foram sensíveis, in vitro, aos antibióticos testados.Frequência de óbito intra-hospitalar associado à infecção por S. maltophilia foi de 44,7%. Indivíduos de ampla faixa etária (0-100 anos) foram acometidos por infecção por S. maltophilia, sendo o sexo feminino o mais prevalente (56,9%). Conclusão: Pneumonia e bacteremia foram as síndromes clínicas mais frequentes causadas por S. maltophila. Constatou-se moderada taxa de mortalidade associada a infecções por S. maltophilia, apesar da alta sensibilidade in vitro aos antibióticos testados. Novos trabalhos se fazem necessários, a fim de gerar dados e informações que possam ser úteis no diagnóstico precoce, manejo e tratamento correto de infecções associadas a S. maltophilia, em especial aquelas com perfil de resistência aos antibóticos

    Brazilian Flora 2020: Leveraging the power of a collaborative scientific network

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    International audienceThe shortage of reliable primary taxonomic data limits the description of biological taxa and the understanding of biodiversity patterns and processes, complicating biogeographical, ecological, and evolutionary studies. This deficit creates a significant taxonomic impediment to biodiversity research and conservation planning. The taxonomic impediment and the biodiversity crisis are widely recognized, highlighting the urgent need for reliable taxonomic data. Over the past decade, numerous countries worldwide have devoted considerable effort to Target 1 of the Global Strategy for Plant Conservation (GSPC), which called for the preparation of a working list of all known plant species by 2010 and an online world Flora by 2020. Brazil is a megadiverse country, home to more of the world's known plant species than any other country. Despite that, Flora Brasiliensis, concluded in 1906, was the last comprehensive treatment of the Brazilian flora. The lack of accurate estimates of the number of species of algae, fungi, and plants occurring in Brazil contributes to the prevailing taxonomic impediment and delays progress towards the GSPC targets. Over the past 12 years, a legion of taxonomists motivated to meet Target 1 of the GSPC, worked together to gather and integrate knowledge on the algal, plant, and fungal diversity of Brazil. Overall, a team of about 980 taxonomists joined efforts in a highly collaborative project that used cybertaxonomy to prepare an updated Flora of Brazil, showing the power of scientific collaboration to reach ambitious goals. This paper presents an overview of the Brazilian Flora 2020 and provides taxonomic and spatial updates on the algae, fungi, and plants found in one of the world's most biodiverse countries. We further identify collection gaps and summarize future goals that extend beyond 2020. Our results show that Brazil is home to 46,975 native species of algae, fungi, and plants, of which 19,669 are endemic to the country. The data compiled to date suggests that the Atlantic Rainforest might be the most diverse Brazilian domain for all plant groups except gymnosperms, which are most diverse in the Amazon. However, scientific knowledge of Brazilian diversity is still unequally distributed, with the Atlantic Rainforest and the Cerrado being the most intensively sampled and studied biomes in the country. In times of “scientific reductionism”, with botanical and mycological sciences suffering pervasive depreciation in recent decades, the first online Flora of Brazil 2020 significantly enhanced the quality and quantity of taxonomic data available for algae, fungi, and plants from Brazil. This project also made all the information freely available online, providing a firm foundation for future research and for the management, conservation, and sustainable use of the Brazilian funga and flora
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