27 results on '"Araujo, M. B."'
Search Results
2. Consequences of Spatial Autocorrelation for Niche-Based Models
- Author
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Segurado, P., Araújo, M. B., and Kunin, W. E.
- Published
- 2006
3. Special Paper: Representing Species in Reserves from Patterns of Assemblage Diversity
- Author
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Araújo, M. B., Densham, P. J., and Williams, P. H.
- Published
- 2004
4. Predicting Species Diversity with ED: The Quest for Evidence
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Araújo, M. B., Densham, P., and Humphries, C.
- Published
- 2003
5. Would Environmental Diversity be a Good Surrogate for Species Diversity?
- Author
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Araújo, M. B., Humphries, C. J., Densham, P. J., Lampinen, R., Hagemeijer, W. J. M., Mitchell-Jones, A. J., and Gasc, J. P.
- Published
- 2001
6. Dynamics of Range Margins for Metapopulations under Climate Change
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Anderson, B. J., Akçakaya, H. R., Araújo, M. B., Fordham, D. A., Martinez-Meyer, E., Thuiller, W., and Brook, B. W.
- Published
- 2009
- Full Text
- View/download PDF
7. Representing taxonomic, phylogenetic and functional diversity : new challenges for Mediterranean marine-protected areas
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Guilhaumon, François, Albouy, C., Claudet, J., Velez, Laure, Lasram, F. B., Tomasini, J. A., Douzery, E. J. P., Meynard, C. N., Mouquet, N., Troussellier, Marc, Araujo, M. B., and Mouillot, D.
- Subjects
marine-protected area ,fungi ,phylogenetic diversity ,Mediterranean fishes ,Functional diversity ,gap analysis ,reserves ,taxonomic diversity - Abstract
AimTo assess gaps in the representation of taxonomic, phylogenetic and functional diversity among coastal fishes in Mediterranean marine-protected areas (MPAs). LocationMediterranean Sea. MethodsWe first assessed gaps in the taxonomic representation of the 340 coastal fish species in Mediterranean MPAs, with representation targets (the species range proportion to be covered by MPAs) set to be inversely proportional to species' range sizes. We then asked whether MPAs favoured representation of phylogenetically and functionally more distinct species or whether there was a tendency to favour less distinctive ones. We finally evaluated the overall conservation effectiveness of the MPAs using a metric that integrates species' phylogenetic and functional relationships and targets achievement. The effectiveness of the MPA system at protecting biodiversity was assessed by comparison of its achievements against a null model obtained by siting current MPAs at random over the study area. ResultsAmong the coastal fish species analysed, 16 species were not covered by any MPA. All the remaining species only partially achieved the pre-defined representation target. The current MPA system missed fewer species than expected from siting MPAs at random. However, c.70% of the species did not achieve better protection in the current MPAs than expected from siting MPAs at random. Functional and evolutionary distinctiveness were weakly correlated with target achievement. The observed coverage of taxonomic, phylogenetic and functional diversity was not different or lower than expected from siting MPAs at random. Main conclusionsThe Mediterranean MPA system falls short in meeting conservation targets for coastal fish taxonomic diversity, phylogenetic diversity and functional diversity. Mediterranean MPAs do not encompass more biodiversity than expected by chance. This study reveals multiple ongoing challenges and calls for regional collaboration for the extension of the Mediterranean system of MPAs to meet international commitments and reduce the ongoing loss of marine biodiversity.
- Published
- 2015
8. Validation of species-climate impact models under climate change
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Araujo, M. B., Pearson, R. G., Thuiller, W., Erhard, M., Biodiversity Research Group, School of Geography and the Environment [Oxford] (SoGE), University of Oxford [Oxford]-University of Oxford [Oxford], Biogeography and Conservation Laboratory, The Natural History Museum, Macroecology and Conservation Unit, University of Évora [Portugal], Laboratoire d'Ecologie Alpine (LECA), Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Climate Change Research Group, South African National Biodiversity Institute, Institute for Meteorology and Climate Research (IMK), and Karlsruhe Institute of Technology (KIT)
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[SDV.EE]Life Sciences [q-bio]/Ecology, environment ,[SDE.MCG]Environmental Sciences/Global Changes ,[SDV.BID]Life Sciences [q-bio]/Biodiversity ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,ComputingMilieux_MISCELLANEOUS - Abstract
International audience
- Published
- 2005
9. Downscaling european species atlas distributions to a finer resolution: implications for conservation planning
- Author
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Araujo, M. B., Thuiller, W., Williams, P. H., Reginster, I., Macroecology and Conservation Unit, University of Évora [Portugal], Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UM3)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Biogeography and Conservation Laboratory, The Natural History Museum, Laboratoire d'Ecologie Alpine (LECA), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Université Joseph Fourier - Grenoble 1 (UJF)-Université Grenoble Alpes (UGA), Département de Géographie (UCL GEO), Université Catholique de Louvain (UCL), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut de Recherche pour le Développement (IRD [France-Sud]), Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), and Université Catholique de Louvain = Catholic University of Louvain (UCL)
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[SDV.EE]Life Sciences [q-bio]/Ecology, environment ,reserve selection ,rarity hotspots ,[SDE.MCG]Environmental Sciences/Global Changes ,distribution atlas ,downscaling ,richness hotspots ,[SDV.BID]Life Sciences [q-bio]/Biodiversity ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,interpolation ,ROC curve ,complementarity ,generalized additive models - Abstract
International audience; Aim One of the limitations to using species' distribution atlases in conservation planning is their coarse resolution relative to the needs of local planners. In this study, a simple approach to downscale original species atlas distributions to a finer resolution is outlined. If such a procedure yielded accurate downscaled predictions, then it could be an aid to using available distribution atlases in real-world local conservation decisions. Location Europe. Methods An iterative procedure based on generalized additive modelling is used to downscale original European 50 x 50 km distributions of 2189 plant and terrestrial vertebrate species to c. 10 x 10 km grid resolution. Models are trained on 70% of the original data and evaluated on the remaining 30%, using the receiver operating characteristic (ROC) procedure. Fitted models are then interpolated to a finer resolution. A British dataset comprising distributions of 81 passerine-bird species in a 10 x 10 km grid is used as a test bed to assess the accuracy of the downscaled predictions. European-wide, downscaled predictions are further evaluated in terms of their ability to reproduce: (1) spatial patterns of coincidence in species richness scores among different groups; and (2) spatial patterns of coincidence in richness, rarity and complementarity hotspots. Results There was a generally good agreement between downscaled and observed fine-resolution distributions for passerine species in Britain (median Jaccard similarity = 70%; lower quartile = 36%; upper quartile = 88%). In contrast, the correlation between downscaled and observed passerine species richness was relatively low (rho = 0.31) indicating a pattern of error propagation through the process of overlaying downscaled distributions for many species. It was also found that measures of model accuracy in fitting original data (ROC) were a poor predictor of models' ability to interpolate distributions at fine resolutions (rho = -0.10). Although European hotspots were not fully coincident between observed and modelled coarse-resolution data, or between modelled coarse resolution and modelled downscaled data, there was evidence that downscaled distributions were able to maintain original cross-taxon coincidence of species-richness scores, at least for terrestrial vertebrate groups. Downscaled distributions were also able to uncover important environmental gradients otherwise blurred by coarse-resolution data. Main conclusions Despite uncertainties, downscaling procedures may prove useful to identify reserves that are more meaningfully related to local patterns of environmental variation. Potential errors arising from the presence of false positives may be reduced if downscaled-distribution records projected to occur outside the range of original coarse-resolution data are excluded. However, the usefulness of this procedure may be limited to data-rich regions. If downscaling procedures are applied to data-poor regions, then there is a need to undertake further research to understand the structure of error in models. In particular, it would be important to investigate which species are poorly modelled, where and why. Without such an assessment it is difficult to support unsupervised use of downscaled data in most real-world situations.
- Published
- 2005
10. Niche properties and geographical extent as predictors of species sensitivity to climate change
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Thuiller, W., Lavorel, S., Araujo, M. B., Centre d’Ecologie Fonctionnelle et Evolutive (CEFE), Université Paul-Valéry - Montpellier 3 (UM3)-Institut National de la Recherche Agronomique (INRA)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-École pratique des hautes études (EPHE)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Climate Change Research Group, South African National Biodiversity Institute, Macroecology and Conservation Unit, University of Évora [Portugal], Laboratoire d'Ecologie Alpine (LECA), Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Université Joseph Fourier - Grenoble 1 (UJF)-Université Grenoble Alpes (UGA), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut National de la Recherche Agronomique (INRA)-Université Paul-Valéry - Montpellier 3 (UPVM)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut de Recherche pour le Développement (IRD [France-Sud]), and Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])
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[SDV.EE]Life Sciences [q-bio]/Ecology, environment ,accuracy ,extinction ,distributions ,scenarios ,[SDV.BID]Life Sciences [q-bio]/Biodiversity ,bioclimatic 'envelope' modelling ,distribution models ,future potential ,land-cover data ,climate change ,niche breadth ,habitats ,range ,responses ,European higher-plants ,[SDE.BE]Environmental Sciences/Biodiversity and Ecology ,range size ,niche position ,biodiversity - Abstract
International audience; Aim Bioclimatic envelope models are often used to make projections of species' potential responses to climate change. It can be hypothesized that species with different kinds of distributions in environmental niche and geographical space may respond differently to changes in climate. Here, we compare projections of shifts in species ranges with simple descriptors of species niche (position and breadth) and geographical (range size) distributions. Location Europe. Methods The future distribution for 1200 European plant species were predicted by niche-based models using seven climate variables known to have an important role in limiting plant species distributions. Ecological niche properties were estimated using a multivariate analysis. Species range changes were then related to species niche properties using generalized linear models. Results Generally, percentage of remaining suitable habitat in the future increased linearly with niche position and breadth. Increases in potential suitable habitat were associated with greater range size, and had a hump-shaped relationship with niche position on temperature gradient. By relating species chorotypes to percentage of remaining or gained habitat, we highlighted biogeographical patterns of species sensitivity to climate change. These were clearly related to the degree of exposure according to regional patterns of projected climate change. Main conclusion This study highlights general patterns about the relationships between sensitivity of species to climate change and their ecological properties. There is a strong convergence between simple inferences based on ecological characteristics of species and projections by bioclimatic 'envelope' models, confirming macroecological assumptions about species sensitivity based on niche properties. These patterns appear to be most strongly driven by the exposure of species to climate change, with additional effects of species niche characteristics. We conclude that simple species niche properties are powerful indicators of species' sensitivity to climate change.
- Published
- 2005
11. Choice of threshold alters projections of species range shifts under climate change
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Nenzén, Hedvig K., Araujo, M. B., Nenzén, Hedvig K., and Araujo, M. B.
- Abstract
One of the least explored sources of algorithmic uncertainty in bioclimatic envelope models (BEM) is the selection of thresholds to transform modelled probabilities of occurrence (or indices of suitability) into binary predictions of species presence and absence. We investigate the impacts of such thresholds in the specific context of climate change. BEM for European tree species were fitted combining 9 climatic models and emissions scenarios, 7 modelling techniques, and 14 threshold-setting techniques. We quantified sources of uncertainty in projections of turnover, and found that the choice of the modelling technique explained most of the variability (39%), while threshold choice explained 25% of the variability in the results, and their interaction an additional 19%. Choice of future climates explained 9% of total variability among projections. Estimated species range shifts obtained by applying different thresholds and models were grouped by IUCN-based categories of threat. Thresholds had a large impact on the inferred risks of extinction, producing 1.7- to 9.9-fold differences in the proportions of species projected to become threatened by climate change. Results demonstrate that threshold selection has large - albeit often unappreciated - consequences for estimating species range shifts under climate change.
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- 2011
- Full Text
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12. Exposure of European biodiversity to changes in human-induced pressures
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UCL, Araujo, M. B., Nogues-Bravo, D., Reginster, I., Rounsevell, Mark, Whittaker, R. J., UCL, Araujo, M. B., Nogues-Bravo, D., Reginster, I., Rounsevell, Mark, and Whittaker, R. J.
- Abstract
There is increasing evidence that areas with high concentrations of species tend to have high concentrations of human activities. would this tendency be altered with projected environmental changes? We investigate this possibility using the most extensive available dataset on species distributions in Europe, providing data for 3143 species. Observed land uses were utilised to generate three indicators of anthropogenic 'pressure' for 1971-2000: urbanisation, cropland and grassland use intensities. Storylines describing alternative development pathways were used to create four land-use scenarios for 2021-2050. Exposure of biodiversity to human activities was measured as changes in the degree of pressure recorded in hypothetical reserve networks selected to maximize the representation of plant, breeding bird, mammal, amphibian, and reptile species. In all socio-economic scenarios there was a tendency for increasing urbanisation and decreasing cropland intensities within selected conservation areas. Pressures arising from increasing grassland use were variable across scenarios and taxa. Our results challenge the idea that a single development strategy might provide reduced impacts in all regions and taxonomic groups. We show that impacts are likely to be complex and that tradeoffs might exist among development strategies. Nevertheless, results are contingent on the data, scale, and type of analyses conducted and further research is required to assess the impacts of alternative human-development scenarios. (c) 2007 Elsevier Ltd. All rights reserved.
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- 2008
13. Strength deficit of knee extensor muscles of individuals with Down syndrome from childhood to adolescence
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Matteo CIONI, Cocilovo, A., Di Pasquale, F., Araujo, M. B. R., Siqueira, C. R., and Bianco, M.
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MUSCLE STRENGTH ,ISOKINETICS ,DEVELOPMENT ,DOWN SYNDROME ,CHILDHOOD ,ADULTHOOD - Published
- 1994
14. Representing species in reserves from patterns of assemblage diversity
- Author
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Araujo, M. B., primary, Densham, P. J., additional, and Williams, P. H., additional
- Published
- 2004
- Full Text
- View/download PDF
15. Detection of Strongyloides stercoralis in the cerebrospinal fluid of a patient with acquired immunodeficiency syndrome
- Author
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Takayanagui, O. M., primary, Lofrano, M. M., additional, Araujo, M. B. M., additional, and Chimelli, L., additional
- Published
- 1995
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16. Uso de ezetimibe en el tratamiento de la hipercolesterolemia familiar en niños y adolescentes.
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Araujo, M. B., Botto, P. M., and Mazza, C. S.
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- 2012
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17. Strength deficit of knee extensor muscles of individuals with Down syndrome from childhood to adolescence.
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Cioni, M, Cocilovo, A, Di Pasquale, F, Araujo, M B, Siqueira, C R, and Bianco, M
- Published
- 1994
18. Strength Deficit of Knee Extensor Muscles of Individuals With Down Syndrome From Childhood to Adolescence.
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Cloni, M., Codilovo, A., Pasquale, F. Di, Araujo, M. B. Rillo, Siqueira, C. Rodrigues, and Bianco, M.
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CHILDREN with intellectual disabilities ,INTELLECTUAL disabilities ,DEVELOPMENTAL biology ,PEOPLE with intellectual disabilities ,PATHOLOGICAL psychology ,PHYSICAL fitness - Abstract
Copyright of American Journal on Mental Retardation is the property of American Association on Intellectual & Developmental Disabilities and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 1994
19. Using probability of persistence to identify important areas for biodiversity conservation
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Williams, P. H. and Araujo, M. B.
20. [Use of ezetimibe in the treatment of familial hypercholesterolemia in children and adolescents].
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Araujo MB, Botto PM, and Mazza CS
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- Adolescent, Child, Child, Preschool, Ezetimibe, Female, Humans, Longitudinal Studies, Male, Retrospective Studies, Anticholesteremic Agents therapeutic use, Azetidines therapeutic use, Hyperlipoproteinemia Type II drug therapy
- Abstract
Unlabelled: Heterozygous familial hypercholesterolemia (FH) is the most common inherited type of primary hyperlipidemia. Patients with familial hypercholesterolemia have an increased level of LDL cholesterol since childhood, and present early associated cardiovascular disease. Ezetimibe reduces LDL by blocking sterol absorption in enterocytes., Aim: to show our experience on the use of ezetimibe in children and adolescents with familial hypercholesterolemia, with short and medium term follow-up., Patients and Methods: Retrospective and longitudinal study. Patients who were receiving ezetimibe as monotherapy from 2003 to 2009 were included. The primary efficacy parameter was the effect of ezetimibe on the LDL after three months of treatment. Serum levels of aspartate aminotransferase, alanine aminotransferase and creatine kinase were monitored. Patients were asked if they experienced any side effect with the ezetimibe treatment. If the Patients did not achieve therapeutical goals with ezetimibe as monotherapy a statin was added. Outcome at medium term follow-up is analysed., Results: The study included a total of 32 patients. The mean age at the start of ezetimibe was 9.5 years (range: 2 to 15.5). The mean total time of Ezetimibe was 2.45 years (r: 0.4 - 5.9).The decrease in mean LDL levels was -25.7% ± 12.3 or 59.5 ± 34 mg% (P<.0001; 95% CI: 47.3-71.5, t test). There were no side effects with ezetimibe monotherapy. At the end of the study, 11 patients required added statins due to failing to achieve the treatment goal., Conclusions: Ezetimibe is effective and safe for children and adolescents with FH in short and medium term follow-up., (Copyright © 2011 Asociación Española de Pediatría. Published by Elsevier Espana. All rights reserved.)
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- 2012
- Full Text
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21. Fungal infections.
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Chimelli L and Mahler-Araujo MB
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- Central Nervous System Diseases pathology, Drug Resistance, Microbial, Humans, Mycoses drug therapy, Mycoses etiology, Opportunistic Infections drug therapy, Opportunistic Infections etiology, Antifungal Agents therapeutic use, Immunocompromised Host, Mycoses pathology, Opportunistic Infections pathology
- Abstract
Fungal infections have increased in frequency in the last decades because of the growing number of immunocompromised patients who survive longer periods of time than in the past, the widespread use of immunosuppressive drugs, a large aging population with increased numbers of malignancies, and the spread of AIDS. Although fungi are present everywhere, some mycoses predominate in the tropics, not only in view of warm temperature and humid climate, which favor their growth, but also because of inadequate hygienic and working conditions brought about by poverty. Mycotic diseases in the brain are usually secondary to infections elsewhere in the body, usually the lungs, less often from other extracranial sites, and in the vast majority of the cases spread via blood circulation. Only occasionally they result from direct extensions from infections of the sinuses or bone, and less frequently from prosthetic heart valves. Candida may be endogenous in origin, inhabiting the digestive tract. Most fungi cause basal meningitis or intraparenchymal abscesses. Direct extension from the cribriform plate cause necro-hemorrhagic lesions in the base of the frontal lobe. Although fungi are common in our environment, few are pathogenic. In this paper mycotic infections are divided into opportunistic and pathogenic; although most of the latter have also been described in immunosuppressed patients, some of those caused by opportunistic organisms, have also occurred in the absence of predisposing factors.
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- 1997
- Full Text
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22. [Diagnosis of hypovitaminosis A and nutritional anemia status in the population of Vale do Jequitinhonha, Minas Gerais, Brazil].
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Araujo RL, Araujo MB, Sieiro RO, Machado RD, and Leite BV
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- Brazil, Child, Child, Preschool, Female, Humans, Infant, Infant, Newborn, Nutritional Status, Pregnancy, Vitamin A blood, Vitamin A therapeutic use, Vitamin A Deficiency drug therapy, Vitamin A Deficiency prevention & control, Anemia, Hypochromic epidemiology, Vitamin A Deficiency epidemiology
- Abstract
A survey was carried out with the purpose of evaluating the nutritional status of the population of Jequitinhonha Valley in regard to vitamin A deficiency and iron-deficiency anemia. A Program--"Programa de Combate à Hipovitaminose A e à Anemia Nutricional Ferropriva em Bolsões de Probreza de Minas Gerais"--is being implanted by the Instituto Nacional de Alimentacão e Nutriçao (INAN) aiming to the prevention of such deficiencies. A random sample of 2,357 children from the towns: Turmalina, Minas Novas and Capelinha (Vale do Jequitinhonha), Minas Gerais (1,604 living in the urban and 753 in the rural areas) was submitted to an eye examination. Blood was drawn from a random subsample of these children (157 from the urban area and 107 from the rural area), in oder to detect possible nutritional problems. The following results were observed (preschool and school children, respectively): 1. Hemoglobin: 23.9% and 20% of the population in the urban area, 34.6 and 18.2% in the rural area, had low and deficient values, respectively. 2. Hematocrit: 1.5 and 2.2% of the population in the urban area, 17.3 and 5.5% in the rural area, had low values. 3. Vitamin A: 8.9 and 4.4% of the population in the urban area, 5.8 and 0% in the rural area, had deficient values (less than 10 micrograms/dl); 26.9 and 31.1% in the urban area, 26.9 and 23.6% in the rural area, had low values (10-20 micrograms/dl). These results show the occurrence of nutritional anemia and vitamin A deficiency in the observed children. As to the eye examination this was performed in 2,357 children. A high incidence of conjunctival xerosis (3.16 and 6.04% in the urban area, 7.7 and 12.6% in the rural area, in preschool and school children, respectively), was detected. Five cases of conjunctival xerosis with Bitot spot (0.2%), corneal xerosis (0.08%) and kerotomalacia (0.04%) were observed. The therapeutic effect of 200,000 UI of oral vitamin A was more efficient in preschool children (90.3% of positive reactions) than in school children (25.9% of positive reactions). The causes of the different reactions are now under study.
- Published
- 1986
23. [Comparative study of atrial ganglia and nerve lesions in patients with chronic Chagas' disease].
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Almeida Hde O, Teixeira Vde P, and Araujo MB
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- Adult, Aged, Female, Ganglia, Autonomic parasitology, Heart Septum pathology, Humans, Male, Middle Aged, Nerve Degeneration, Neurons parasitology, Chagas Cardiomyopathy pathology, Ganglia, Autonomic pathology, Heart Septum innervation, Neurons pathology
- Published
- 1988
24. [Parasitism of the vena cava and adrenal veins in chronic chagasic patients].
- Author
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Teixeira Vde P, Almeida Hde O, dos Reis MA, Silveira SA, and Araujo MB
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- Adrenal Glands pathology, Animals, Humans, Veins parasitology, Vena Cava, Inferior pathology, Adrenal Glands blood supply, Chagas Cardiomyopathy pathology, Trypanosoma cruzi isolation & purification, Vena Cava, Inferior parasitology
- Abstract
The occurrence of nest of trypanosoma cruzi in the smooth muscle cells of the central veins of the adrenal glands and the inferior vena cava was studied in 21 chronic Chagas' patients, by serial sections. Nine patients presented parasites in the adrenal veins, with a total of 24 nests, and only one nest was found in the inferior vena cava. The area of muscular tissue examined was of 2944.3 mm2 for the adrenal veins and of 47808.6 mm2 for the vena cava, giving a relation of 0.815 nests/100 mm2 for the adrenal vein and of 0.002 for the vena cava. Thus the smooth muscle of the adrenal vein was 407 times more parasited than the muscular wall of the inferior vena cava. This higher parasitism of the adrenal vein by trypanosoma cruzi in chronic Chagas' disease may be determined by its greater corticosteroid concentration, which can reduce the anti-trypanosomal defenses.
- Published
- 1989
25. Evaluation of a program to overcome vitamin A and iron deficiencies in areas of poverty in Minas Gerais, Brazil.
- Author
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Araujo RL, Araujo MB, Machado RD, Braga AA, Leite BV, and Oliveira JR
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- Adolescent, Brazil, Child, Child, Preschool, Evaluation Studies as Topic, Female, Hematocrit, Hemoglobins analysis, Humans, Infant, Male, Pregnancy, Random Allocation, Vitamin A blood, Ferrous Compounds administration & dosage, Iron Deficiencies, Mebendazole administration & dosage, Regional Medical Programs, Vitamin A administration & dosage, Vitamin A Deficiency prevention & control
- Abstract
Randon samples of children from both sexes from Belo Horizonte, the capital City, and from Turmalina, Jequitinhonha Valley, Minas Gerais, Brazil, were submitted to nutritional evaluation before and after the intervention "Program to Overcome Vitamin A and Iron Deficiencies in Areas of Poverty in Minas Gerais, Brazil". After the first examination, all the children received, with an interval of 180 days, a single oral dose of vitamin A, oral iron sulfate during 50 days, and 200 mg of Mebendazol/day for three days. Thirty days after ending administration of the third dose of medicine, the children were subjected to a new evaluation. In Belo Horizonte, the first evaluation revealed a high prevalence of deficient and low values of vitamin A in preschool children (21.5%) and school children (21.7%). A small prevalence of low hematocrit values was also observed in both groups. Deficient and low values of hemoglobin were found as well in 21.5% of preschool children and in 17.5% of school children. The second evaluation, practiced 30 days after the third dose of medicine, showed a small incidence of low vitamin A values (4.3% in preschool children and 2.9% in school children) and low hemoglobin values (6.5% in preschool children and 2.9% in school children). No deficient values of hemoglobin and vitamin A were observed. Concerning the hematocrit value, only one school child presented a low value at the second evaluation. On the other hand, in Jequitinhonha Valley, five cases of Bitot spot with conjunctival xerosis, two cases of corneal xerosis, and one case of keratomalacia were detected at the first examination. Thirty days after ending the third dose of medicine, only one corneal scar was observed. Only a small number of children with deficient and low levels of vitamin A and hemoglobin was found in the final evaluation (less than 8%), while this number was high at the first evaluation (above 38 and 12%, respectively). These results show the efficiency of the intervention Program in relation to hypovitaminosis A and iron anemia prevention. The Program is now being implemented by the Brazilian Ministry of Health.
- Published
- 1987
26. [Painless joint mobilization by reflexological therapy; preliminary note].
- Author
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DE ARAUJO MB
- Subjects
- Humans, Arm, Brachial Plexus, Brachial Plexus Neuropathies, Paralysis, Physical Therapy Modalities
- Published
- 1958
27. [Clothiapine in chronic schizophrenia].
- Author
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Madalena JC, Araujo MB, Maroja PR, and Mattos HG
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- Adult, Aged, Haloperidol therapeutic use, Humans, Middle Aged, Dibenzothiazepines therapeutic use, Schizophrenia drug therapy
- Published
- 1969
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