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Search Results: 1 - 10 of 2755 matches for " Bacary Ba "
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Renal Disease among HIV Positive Patients in Senegal  [PDF]
Khodia Fall, Mouhamadou Moustapha Cissé, Ahmed Tall Lemrabott, Maria Faye, Mouhamed Cherif Dial, Atoumane Faye, Seynabou Fall, Moustapha Faye, Alex Keita, Mansour Mbengue, Seynabou Diagne, Niakhaleen Keita, Bacary Ba, Abdou Niang, Boucar Diouf, El Hadji Fary Ka
Open Journal of Nephrology (OJNeph) , 2017, DOI: 10.4236/ojneph.2017.74012
Abstract: Introduction: Renal disease (RD) in human immunodeficiency virus (HIV) infection is a decisive turning point in the development and prognosis of this disease. In Africa, the prevalence varies between 2.5% and 48.6%. In Senegal, little data are available in the literature. The objective of our study was to describe the epidemiological, clinical, paraclinical, therapeutic and progressional aspects in patients living with HIV (PLWHIV). Patients and methods: This was a retrospective, descriptive and analytical study carried out over a 10-year period in the Department of Internal Medicine and Nephrology at the Aristide Le Dantec Hospital in Dakar, Senegal. We included all 15-year old and above PLHIV with available CD4 count and viral load. Results: Out of 248 PLHIV, 32 had kidney disease (KD), which means a hospital prevalence of 12.9%. The mean age was 51.22 ± 10 years (extremes of 36 and 77 years) with a sex ratio (male/female) of 1.28. Renal signs were dominated by glomerular nephropathy syndrome. It was present at 80%. Tubulo-interstitial nephropathy syndrome and chronic uremic syndrome accounted for 6.25% and 3.1% of cases, respectively. Renal function Impairment was present in 21 patients with 18 cases of acute kidney injury (85.7%) and 3 cases of chronic renal failure (14.3%), including 2 in stage 5 of chronic kidney disease. Renal biopsy (RB) was indicated and performed in 20 (62.5%) patients with glomerular signs in 12 patients (60%). Glomerular lesions were dominated by focal and segmental glomerulosclerosis (FSGS) in 6 cases, membraneous nephropathy (MN) in 4 cases and minimal change disease (MCD) in 2 cases. Tubulo-interstitial and vascular lesions were present in 45% and 12.5% of cases, respectively. In highly active antiretroviral therapy (HAART), 12 (37.5%) patients had total remission, 9 (28.12%) had partial remission. One (3.12%) death from severe metabolic acidosis on chronic renal failure was deplored. Conclusion: This study illustrates the high prevalence of RD in PLHIV in our exercise context.
Differential kinetics of plasma procalcitonin levels in cerebral malaria in urban Senegalese patients according to disease outcome
Babacar Mbengue,Bacary Diatta,Birahim Niang,Ngor Diagne
Microbiology Research , 2011, DOI: 10.4081/mr.2011.e22
Abstract: P. falciparum malaria continues as the serial killer of over a million lives yearly, mainly for children in sub-Saharan Africa. For severe malaria, we are still on the quest for a prognostic marker of fatal outcome. We analysed the association between serum levels of Procalcitonin (PCT), a marker of septic inflammation, and clinical outcome in Senegalese patients admitted with confirmed cerebral malaria in the intensive care facility of Hopital Principal. A total of 98 patients living in the hypoendemic urban area of Dakar, Senegal, were enrolled during transmission seasons. Levels of PCT were compared between surviving vs the 26.5 % fatal cases in blood samples of the 3 days following hospitalisation. Mean PCT levels were elevated in patients with active infection, with a large range of values (0.1 to 280 nanog per mL), significantly higher on day 0 in fatal cases than in surviving (53.6 vs 27.3; P=0.01). No exact individual threshold level could indicate occurrence of fatality, however mortality could be most accurately predicted by PCT level above 69 nanog per ML and there was a very clear different profile of evolution of PCT levels on the 3 days of observation decreasing early from day 1 in surviving patients (P<10–3), contrary to fatal cases. These results indicate that PCT kinetic rather than intrinsic level could be of use to predict a reduced risk of fatality in patient with cerebral malaria and could serve as potential predicting marker for severe malaria.
Pyramidal and Granule Cells Distribution through Hippocampal Fields: An Index for Sensory Information Processing  [PDF]
Abdoulaye Ba
Journal of Behavioral and Brain Science (JBBS) , 2015, DOI: 10.4236/jbbs.2015.55018
Abstract: Background: This work aims at investigating the histology of hippocampus formation as structural model of information processing. The study addressed the question whether the pattern of cellular type distribution within hippocampal fields could be used as support of information processing in the hippocampus. Method: Pyramidal-shaped neurons presenting both cytoplasm and nucleus outlined clearly were measured systematically on brain slides, using a light microscope connected to a microcomputer equipped with a scanner software for measuring particles. Morphological types of cells were identified following class sizes and their distribution determined through hippocampal fields. Results: A battery of statistical tests: Sturges’ classification, class sizes distribution around overall mean, Bartlett’s sphericity test, principal components analysis (PCA) followed by correlations matrix analysis and ANOVA allowed two cellular groups to be identified in the hippocampus: large and small pyramidal-shaped cells. Conclusion: The results show that sensory information processing in the hippocampus could be built on two classes of pyramidal neurons that differed anatomically with probably different physiological functions. The study suggests combination ensembles clustering large and small pyramidal cells at different rates, as fundamental signaling units of the hippocampus.
Electronically Tunable Minimum Component Biquadratic Filters for Interface Circuits  [PDF]
Mehmet Sa?ba
Circuits and Systems (CS) , 2011, DOI: 10.4236/cs.2011.23033
Abstract: In this paper, two new electronically tunable filter configurations are proposed. The proposed filters operate current-mode (CM), voltage-mode (VM), transimpedance-mode (TIM) and transadmittance-mode (TAM). The first configuration realizes second-order VM band-pass and TAM high-pass filter characteristics from the same configuration. The second one realizes second-order TIM band-pass and CM low-pass filter characteristics from the same configuration. They also use minimum number of electronic components (two capacitors and one active component namely; current controlled current difference transconductance amplifier). The workability of the proposed structures has been demonstrated by simulation results.
Analysis of Agricultural Commodities Value Chains and Greenhouse Gas Emission in Rice and Maize in West Africa: Impact on Food Security  [PDF]
Mahamadou Nassirou Ba
Agricultural Sciences (AS) , 2016, DOI: 10.4236/as.2016.77047
Abstract: This paper analyses the greenhouse gas (GHG) emission along the value chains of two strategic commodities in West Africa (rice and maize) in four pilot countries: Ghana, Senegal Benin and Cote D’Ivoire. The Value Chains Analysis and Greenhouse model used in this study, provides insight into the relationship between output maximization and GHG emissions to help define optimal intervention approaches that minimize emissions while maximizing the potential yield, hence boost food security. It highlights intervention measures for improvement of production and productivity along with the identification of mitigation measures to reduce GHG emissions. It also revealed that the largest GHG emission factor from maize farming in the selected countries is from the application of nitrogen fertilizers (NO2), and for rice farming, depending on the systems, e.g. rain fed, irrigated or multiple aeration, the emission is mostly due to anaerobic decomposition of methane (CH4) which increases with flooding practice.
Strategic Agricultural Commodity Value Chains in Africa for Increased Food: The Regional Approach for Food Security  [PDF]
Mahamadou Nassirou Ba
Agricultural Sciences (AS) , 2016, DOI: 10.4236/as.2016.79055
The challenge Africa faces the most is how to feed the 2.4 billion people in 2050. This will require a transformational agriculture. Africa doesn’t need subsistence agriculture, but rather agriculture linked to the market where market demand and the consuming habits are taken in consideration. Agriculture evolves in an environment where small holders are linked to markets (national and regional), where economies of complementarity and economies of scale are taken advantage of by producers and private sector. In short, Africa will need a paradigm shift to industrialise and commercialise its agriculture sector in order to increase food production, and income and to create jobs in and outside the sector. Africa needs agribusiness and agro-industries to domesticate the benefits of the sector, to create wealth in the sector and retain that wealth in the continent. Agricultural commodities regional value chains for increased food should be the target for Africa. The continent remains the region with the highest prevalence of under-nourishment. Since agriculture remains the mainstay of most African economies except the mineral producers, the sector deserves a close attention from leaders. It accounts for 65% of employment and 40% of Africa’s export earnings and accounts for 17% of the GDP. This shows how important the sector is. Agriculture needs to be seen as a conduit for farmers to get connected to markets, a conduit for revenue, for jobs and for transformation. Africa needs to come back on the international scene as food sufficient continent and even food exporter. This can be achieved only with a stable, productive agricultural resource base. Thus, achieving and sustaining food security and economic prosperity in Africa will require significant efforts to modernize the continent’s agriculture sector through injection of agribusiness and agro-industries and through the application of science and technology in agriculture. In essence, agriculture needs to be viewed as knowledge based entrepreneurial activity. Smart investments in agriculture will have multiplier effects for the whole economy and hence induce prosperity to other sectors. In recent years, a renewed focus on agriculture has been evident in policy and development agendas across the African continent. This paper outlines the status of agriculture, agribusiness and agro-industries in Africa, their role in the agenda of agricultural transformation and economic transformation and the focus on regional value
The Capability Approach and Evaluation of the Well-Being in Senegal: An Operationalization with the Structural Equations Models  [PDF]
Felwine Sarr, Muhammad Ba
Modern Economy (ME) , 2017, DOI: 10.4236/me.2017.81007
Abstract: This article uses the theoretical framework of the capabilities approach to offer a structural assessment model of well-being in the context of Senegal. To this end, we mobilize the Senegalese data (ESPS-II) and an evaluation space including basic and central capabilities of [1] and [2], which are: living conditions, education and health body, non-institutional support and good governance, on the one hand, and the three dimensions of well-being (economic well-being, life satisfaction and subjective well-being), on the other hand. With the modeling technique by structural equations: PLS-PM (Partial Linear Square-Path Modeling), we find that the estimation model of well-being has built good predictive quality. In addition, it shows that the basic capabilities (education, living conditions and health of the body) positively determine well-being (economic well-being, subjective well-being and life satisfaction). Also, economic well-being and life satisfaction positively predict and cause subjective well-being. Contrariwise, non-institutional support and good governance do not significantly cause subjective well-being. Between these two capabilities, only good governance has a significant and positive effect on life satisfaction.
Competiveness of Maize Value Chains for Smallholders in West Africa: Case of Benin, Ghana and Cote D’Ivoire  [PDF]
Mahamadou Nassirou Ba
Agricultural Sciences (AS) , 2017, DOI: 10.4236/as.2017.812099
Abstract: The paper analyses the entire value chains of the maize food crop in targeted countries. It identifies the maize actors and related business linkages from input supply to product markets, the governance of the chain, mainly the decision making to decrease the transaction costs, the chain performance including efficiency in value-added, gender equity and sustainability and the need for capacity building in various segments along the maize value chains in Benin, Ghana, and Càte d’Ivoire. The main objective of the paper is to contribute to better livelihoods of rural poor through empowerment and gender equitable access to maize value chain opportunities, inputs and product markets through technical backstopping and capacity strengthening so that smallholders understand and participate in the value chains and benefit from it. The following specific objectives are to i) identify the constraints and opportunities and linkages between actors across agro-ecological zones through country and regional level baselines; ii) develop an analytical support toolkit to analyze competitiveness, trends and outlook of maize taking into account climate change and policy shifts at micro, meso and macro level and iii) strengthen the capacity of regional maize value chain actors in the targeted countries. A systematic sampling of one out of every three successive shed was used to select wholesalers whereas snowballing sampling was used to select the assemblers, retailers and processors. The paper informs on the status of technologies application along maize value chains in selected countries and analyzes the economical profitability and/or profit maximization of maize value chains.
Ileal Occlusion on Bezoars at Kati BSS Hospital  [PDF]
Keita Koniba, Abdoulaye Diarra, Sidiki Keita, Issa Traore, Salia Coulibaly, Fadima Tall, Daouda Diallo, Oulematou Coulibaly, Assitan Kone, Boubacar Kone, Mahamadou Bacary Coulibaly, Daouda Konate, Ismael Konare, Drissa Traore
Surgical Science (SS) , 2019, DOI: 10.4236/ss.2019.101005
Abstract: Bowel occlusions by bezoars are rare pathologies. They are due to an ob-struction of the intestinal lumen by a solid mass of fruits or undigested vegetable fibers. They are seasonal (wild fruit season from March to June) in the Sahel Zone. We report a case of small bowel obstruction in a 35-year-old rural man after swallowing a significant amount of wild grapes (Lannea microcarpa). We proceeded to the resection of the occluded ileal segment and performed an ileal terminal ileal anastomosis. There weren’t any complications during the postoperative site.
Quantitative Analysis of Complex Tropical Forest Stands: A Review
BA Oyebade, BA Ekeke
African Research Review , 2010,
Abstract: The importance of data analysis in quantitative assessment of natural resources remains significant in the sustainable management of complex tropical forest resources. Analyses of data from complex tropical forest stands have not been easy or clear due to improper data management. It is pivotal to practical researches and discovery that promote development in forestry and many related disciplines. Many quantitative methods and approaches are strongly dependent on the source, nature, and quality of the data. However, many issues related to data analysis in the tropical complex forests are inimical and may render quantitative methods impossible if not resolved. Data collection in many complex tropical forests is very difficult and oftentimes results in data violating simple assumptions of statistical models. The use of relevant data transformation proffers significant solution to this perennial challenge within the complex tropical forests. This paper therefore reviews statistical issues related to quantitative data collection and analyses in the complex tropical forests and provides pragmatic approaches for solving data analysis challenges in complex tropical forests’ management and planning.
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