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Search Results: 1 - 10 of 189853 matches for " G. Diarrassouba "
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Several Dengue: About 2 Cases with Pulmonary Disease  [PDF]
Anhum Konan, M. H. Aké-Assi, B. Kouadio, T. K. F. Eboua, A. Sétchéou, G. Diarrassouba, Kouamé N’goran
Open Journal of Respiratory Diseases (OJRD) , 2018, DOI: 10.4236/ojrd.2018.84007
Abstract: The most widespread arbovirus in the world, dengue fever has been rampant since the 18th century. Since then, several epidemics have been documented in Asia, the Caribbean, South America and Africa. The authors report two cases of dengue fever in children aged six (6) and twelve (12) years respectively. The diagnosis of several dengue pulmonary was retained in these children, clinico-radiological and biological arguments. In addition to the hemorrhagic syndrome, the pulmonary symptomatology associated cough, dyspnea. Chest X-ray revealed bilateral and extensive alveolar interstitial radiological lesions. From a biological point of view, the positivity of dengue-specific IgM has confirmed arboviruses. From the diagnostic peculiarities of the cases observed, the authors suggest the search for factors associated with a primary dengue infection from several onsets to pulmonary manifestation in children. Indeed, this fringe of the population is no longer concerned with acute respiratory infections. In addition, the socio-cultural context of poverty, of pre-hospital therapeutic itinerary favoring traditional medicine, delays hospital care.
Le Syndrome de Denys-Drash, une Cause Rare de Syndrome Néphrotique : à Propos d’un Cas en Milieu Pédiatrique Tropical
LY Adonis-Koffy, KV Assê, F Kouassi, G Diarrassouba, EJM Koutou, E Niamien, P Coulibaly, G Desch enes
Clinics in Mother and Child Health , 2011,
Abstract: Le syndrome de Denys-Drash (DD) est une affection génétique rare due à la mutation du gène WT1, impliqué dans la morphogenèse des organes génitaux externes et du rein. Il associe un syndrome néphrotique congénital et une ambigu té sexuelle. Les premiers signes surviennent dès les 3 premiers mois de vie sous forme d’une sclérose mésangiale diffuse posant un véritable problème thérapeutique. L’évolution spontanée se fait vers une insuffisance rénale terminale et vers une tumeur de Wilms et/ou un gonadoblastome. Dans cet article, nous rapportons le cas d’un syndrome de DD chez un nourrisson de race noire agé de 6 mois dans l’unité de néphrologie pédiatrique du CHU de Yopougon. Nous discutons `a partir d’une revue de la littérature les principaux aspects diagnostics, thérapeutiques et évolutifs de ce syndrome. Nous insistons sur la nécessité d’une collaboration multidisciplinaire incluant les obstétriciens, néonatalogistes, chirurgien pédiatres et néphropédiatres pour un diagnostic précoce et une prise en charge adaptée. Mots Clés syndrome néphrotique congénital ; syndrome de Denys-Drash ; C te d’Ivoire
Exploring Risk Behaviors and Vulnerability for HIV among Men Who Have Sex with Men in Abidjan, Cote d′Ivoire: Poor Knowledge, Homophobia and Sexual Violence
Josephine Aho, Avi Hakim, Bea Vuylsteke, Gisèle Semde, Honorat G. Gbais, Mamadou Diarrassouba, Marguerite Thiam, Marie Laga
PLOS ONE , 2014, DOI: 10.1371/journal.pone.0099591
Abstract: Men who have sex with men (MSM) are at high risk of HIV. Few data are available on MSM and HIV-related risk behaviors in West Africa. We aimed to describe risk behaviors and vulnerability among MSM in Abidjan, Cote d′Ivoire. We conducted a cross-sectional respondent-driven sampling survey with 601 MSM in 2011–2012. Sociodemographic and behavioural data as well as data related to emotional state and stigma were collected. Population estimates with 95% confidence intervals were produced. Survey weighted logistic regression was used to assess factors associated with inconsistent condom use in the prior 12 months. Most MSM were 24 years of age or younger (63.9%) and had attained at least primary education (84.4%). HIV risk behaviors such as low condom and water-based lubricant use, high numbers of male and female sex partners, and sex work were frequently reported as well as verbal, physical and sexual abuse. Inconsistent condom use during anal sex with a male partner in the prior 12 months was reported by 66.0% of the MSM and was positively associated with history of forced sex, alcohol consumption, having a regular partner and a casual partner, having bought sex, and self-perception of low HIV risk. MSM in Abidjan exhibit multiple and frequent HIV-related risk behaviors. To address those behaviours, a combination of individual but also structural interventions will be needed given the context of stigma, homophobia and violence.
Prospects for the Development of Odour Baits to Control the Tsetse Flies Glossina tachinoides and G. palpalis s.l.
J. B. Rayaisse,I. Tirados,D. Kaba,S. Y. Dewhirst,J. G. Logan,A. Diarrassouba,E. Salou,M. O. Omolo,P. Solano,M. J. Lehane ,J. A. Pickett,G. A. Vale,S. J. Torr,J. Esterhuizen
PLOS Neglected Tropical Diseases , 2010, DOI: 10.1371/journal.pntd.0000632
Abstract: Field studies were done of the responses of Glossina palpalis palpalis in C?te d'Ivoire, and G. p. gambiensis and G. tachinoides in Burkina Faso, to odours from humans, cattle and pigs. Responses were measured either by baiting (1.) biconical traps or (2.) electrocuting black targets with natural host odours. The catch of G. tachinoides from traps was significantly enhanced (~5×) by odour from cattle but not humans. In contrast, catches from electric targets showed inconsistent results. For G. p. gambiensis both human and cattle odour increased (>2×) the trap catch significantly but not the catch from electric targets. For G. p. palpalis, odours from pigs and humans increased (~5×) the numbers of tsetse attracted to the vicinity of the odour source but had little effect on landing or trap-entry. For G. tachinoides a blend of POCA (P = 3-n-propylphenol; O = 1-octen-3-ol; C = 4-methylphenol; A = acetone) alone or synthetic cattle odour (acetone, 1-octen-3-ol, 4-methylphenol and 3-n-propylphenol with carbon dioxide) consistently caught more tsetse than natural cattle odour. For G. p. gambiensis, POCA consistently increased catches from both traps and targets. For G. p. palpalis, doses of carbon dioxide similar to those produced by a host resulted in similar increases in attraction. Baiting traps with super-normal (~500 mg/h) doses of acetone also consistently produced significant but slight (~1.6×) increases in catches of male flies. The results suggest that odour-baited traps and insecticide-treated targets could assist the AU-Pan African Tsetse and Trypanosomiasis Eradication Campaign (PATTEC) in its current efforts to monitor and control Palpalis group tsetse in West Africa. For all three species, only ~50% of the flies attracted to the vicinity of the trap were actually caught by it, suggesting that better traps might be developed by an analysis of the visual responses and identification of any semiochemicals involved in short-range interaction.
Impact of some climatic and phenological parameters on the callogenesis and somatic embrogenesis variations in coco
AE Issali, A Traoré, N Diarrassouba, J Andi Kohi Ngoran, A Sangaré
African Crop Science Journal , 2012,
Abstract: Callogenesis and somatic embryogenesis (SE) are influenced by several factors including climate and phenology. To assess such an influence, the percentage of callogenesis and SE variations depending on five climatic and two phenological parameters was measured for 2 years. Staminodes and petals from six hybrids and two clones ascontrols were cultured in bulk, onto three distinct calli induction media only differing in hormonal concentrations.From the results, it emerged that sole leaves flush does not vary from year to year. Maximal temperature and flowering level are the most stably linked. Non-linear regression provides the best R2-values of fitted curves. This shows that the link among climate, phenology, callogenesis and SE is not linear. In the first year, in control clones,climatic and phenological parameters explain 52.80% callogenesis variations, against 31.50% for SE. Therefore,climate and phenology significantly influence callogenesis, but not SE. For further industrial production of secondary metabolites such as butter, the obromin and chocolate aroma from calli, it would be desirable also to identify the favourable periods for calli production. Nevertheless, somatic embryos will continue to be produce all the year irrespective of period. Key Words: C te d’Ivoire, petals, staminodes
Development of Predictive QSPR Model of the First Reduction Potential from a Series of Tetracyanoquinodimethane (TCNQ) Molecules by the DFT (Density Functional Theory) Method  [PDF]
Fatogoma Diarrassouba, Mawa Koné, Kafoumba Bamba, Yafigui Traoré, Mamadou Guy-Richard Koné, Edja Florentin Assanvo
Computational Chemistry (CC) , 2019, DOI: 10.4236/cc.2019.74009
Abstract: In this work, which consisted to develop a predictive QSPR (Quantitative Structure-Property Relationship) model of the first reduction potential, we were particularly interested in a series of forty molecules. These molecules have constituted our database. Here, thirty molecules were used for the training set and ten molecules were used for the test set. For the calculation of the descriptors, all molecules have been firstly optimized with a frequency calculation at B3LYP/6-31G(d,p) theory level. Using statistical analysis methods, a predictive QSPR (Quantitative Structure-Property Relationship) model of the first reduction potential dependent on electronic affinity (EA) only have been developed. The statistical and validation parameters derived from this model have been determined and found interesting. These different parameters and the realized statistical tests have revealed that this model is suitable for predicting the first reduction potential of future TCNQ (tetracyanoquinodimethane) of this same family belonging to its applicability domain with a 95% confidence level.
Towards an Optimal Design of Target for Tsetse Control: Comparisons of Novel Targets for the Control of Palpalis Group Tsetse in West Africa
Jean Baptiste Rayaisse,Johan Esterhuizen,Inaki Tirados,Dramane Kaba,Ernest Salou,Abdoulaye Diarrassouba,Glyn A. Vale,Michael J. Lehane ,Stephen J. Torr,Philippe Solano
PLOS Neglected Tropical Diseases , 2011, DOI: 10.1371/journal.pntd.0001332
Abstract: Background Tsetse flies of the Palpalis group are the main vectors of sleeping sickness in Africa. Insecticide impregnated targets are one of the most effective tools for control. However, the cost of these devices still represents a constraint to their wider use. The objective was therefore to improve the cost effectiveness of currently used devices. Methodology/Principal Findings Experiments were performed on three tsetse species, namely Glossina palpalis gambiensis and G. tachinoides in Burkina Faso and G. p. palpalis in C?te d'Ivoire. The 1×1 m2 black blue black target commonly used in W. Africa was used as the standard, and effects of changes in target size, shape, and the use of netting instead of black cloth were measured. Regarding overall target shape, we observed that horizontal targets (i.e. wider than they were high) killed 1.6-5x more G. p. gambiensis and G. tachinoides than vertical ones (i.e. higher than they were wide) (P<0.001). For the three tsetse species including G. p. palpalis, catches were highly correlated with the size of the target. However, beyond the size of 0.75 m, there was no increase in catches. Replacing the black cloth of the target by netting was the most cost efficient for all three species. Conclusion/Significance Reducing the size of the current 1*1 m black-blue-black target to horizontal designs of around 50 cm and replacing black cloth by netting will improve cost effectiveness six-fold for both G. p. gambiensis and G. tachinoides. Studying the visual responses of tsetse to different designs of target has allowed us to design more cost-effective devices for the effective control of sleeping sickness and animal trypanosomiasis in Africa.
How Do Tsetse Recognise Their Hosts? The Role of Shape in the Responses of Tsetse (Glossina fuscipes and G. palpalis) to Artificial Hosts
Inaki Tirados,Johan Esterhuizen,Jean Baptiste Rayaisse,Abdoulaye Diarrassouba,Dramane Kaba,Serge Mpiana,Glyn A. Vale,Philippe Solano,Michael J. Lehane ,Stephen J. Torr
PLOS Neglected Tropical Diseases , 2011, DOI: 10.1371/journal.pntd.0001226
Abstract: Palpalis-group tsetse, particularly the subspecies of Glossina palpalis and G. fuscipes, are the most important transmitters of human African trypanomiasis (HAT), transmitting >95% of cases. Traps and insecticide-treated targets are used to control tsetse but more cost-effective baits might be developed through a better understanding of the fly's host-seeking behaviour. Electrocuting grids were used to assess the numbers of G. palpalis palpalis and G. fuscipes quanzensis attracted to and landing on square or oblong targets of black cloth varying in size from 0.01 m2 to 1.0 m2. For both species, increasing the size of a square target from 0.01 m2 (dimensions = 0.1×0.1 m) to 1.0 m2 (1.0×1.0 m) increased the catch ~4x however the numbers of tsetse killed per unit area of target declined with target size suggesting that the most cost efficient targets are not the largest. For G. f. quanzensis, horizontal oblongs, (1 m wide×0.5 m high) caught ~1.8x more tsetse than vertical ones (0.5 m wide×1.0 m high) but the opposite applied for G. p. palpalis. Shape preference was consistent over the range of target sizes. For G. p. palpalis square targets caught as many tsetse as the oblong; while the evidence is less strong the same appears to apply to G. f. quanzensis. The results suggest that targets used to control G. p. palpalis and G. f. quanzensis should be square, and that the most cost-effective designs, as judged by the numbers of tsetse caught per area of target, are likely to be in the region of 0.25×0.25 m2. The preference of G. p. palpalis for vertical oblongs is unique amongst tsetse species, and it is suggested that this response might be related to its anthropophagic behaviour and hence importance as a vector of HAT.
A Characterization of the Members of a Subfamily of Power Series Distributions  [PDF]
G. Nanjundan
Applied Mathematics (AM) , 2011, DOI: 10.4236/am.2011.26099
Abstract: This paper discusses a characterization of the members of a subfamily of power series distributions when their probability generating functions satisfy the functional equation where a, b and c are constants and is the derivative of f.
Double Negative Left-Handed Metamaterials for Miniaturization of Rectangular Microstrip Antenna  [PDF]
G. Singh
Journal of Electromagnetic Analysis and Applications (JEMAA) , 2010, DOI: 10.4236/jemaa.2010.26044
Abstract: In this paper, I have explored a significant concept for the miniaturization of microstrip patch antenna configuration by using the double negative (DNG) left-handed Metamaterials, which have dielectric permittivity and magnetic permeability both negative, simultaneously. It is achieved through the concept of phase-compensation by thin slab consist of the double positive (DPS) material, which have dielectric permittivity and magnetic permeability both positive, simultaneously and DNG metamaterials as a substrate of the microstrip patch antenna. By combining the DNG metamaterial slab with the slab made of DPS materials form a cavity resonator whose dispersion relation is independent of the sum of thickness of the slabs filling this cavity but it depends on the ratio of their thicknesses. This cavity constitutes by DPS and DNG material is used as substrate of the microstrip antennas and the DNG material slab is behave as phase compensator.
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