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Alteration Typology and Geochemical Signatures of the Napélépéra Gold-Bearing Granodiorite in South-West Burkina Faso (West Africa)

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Open Journal of Geology 2023年第10期13卷 1162-1175页

作者： Théophile Ouédraogo Sâga Sawadogo Hermann Ilboudo Séta Naba Laboratoire Géosciences et Environnement (LaGE) Département des Sciences de la Terre Université Joseph KI-ZERBO Ouagadougou Burkina Faso

The characterization of the relationships between mineralization and hydrothermal alteration is an essential element in understanding gold deposits. In south-west Burkina Faso, the Napélépéra mineralisation, the mobility of chemical elements and alteration-mineralization relationships were studied by means of selected core drilling and geochemical analyses using ICP-MS (Inductively Coupled Plasma Mass Spectrometry) and ICP-AES (Inductively coupled plasma atomic emission spectroscopy). The mineralised granodiorite is grey porphyroid with quartz, plagioclase, biotite and amphibole. It is metaluminous and located in the tholeiitic series. The Na2O + CaO versus Fe2O3 + MgO alteration diagram divides the samples according to alteration dominance. Chloritisation and carbonation are the main alterations. There is a relationship between gold mineralisation at Napélépéra and alteration, and the paragenesis of gold + pyrite ± carbonate ± silica ± sericite is the main characteristic. Carbonation is the result of fluid input in the shear corridor of the mineralised zone. The mass balance of comparative metals in the proximal and distal zones of the mineralisation shows the absence of metals, while As, Hg, Ag and Bi are strongly enriched from the distal zone to the mineralised zone. The oxides associated with the mineralisation are mainly NaO, SrO and CaO.

关键词： Gold Mineralization Alteration Mass Balance Granodiorite

Lamprophyre Rocks in the Nassara Gold Deposit, Southwest Burkina Faso: Characteristics and Implication for Mining Exploration

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Open Journal of Geology 2023年第12期13卷 1291-1311页

作者： Pascal Ouiya Adama Ouédraogo Yaméogo Sâga Sawadogo Séta Naba Ecole Normale Supérieure (ENS) Institut Sciences et Technologie (IST) Ouagadougou Burkina Faso Laboratoire Géosciences et Environnement (LaGE) Earth Sciences Department Ouagadougou Burkina Faso University Norbert ZONGO (UNZ) Koudougou Burkina Faso

The lamprophyres are late dykes that cut the formations hosting the gold mineralization in the Nassara deposit. They are geographically and spatially related to most orogenic gold deposits. It is with the aim of characterizing them and seeing their implications for exploration that this work is carried out. To achieve our objective, petrographic studies and chemical analyses of minerals (pyroxenes, amphiboles, feldspars, chromite) and geochemical analyses of total rock were carried out. These studies have enabled us to classify the Nassara lamprophyres as calc-alkaline lamprophyres of the spessartite type. The Cr, Co, Ni and Mg enrichment of these rocks would indicate a depleted mantle source, with LILE enrichment by fluids probably related to metasomatic activity. The various diagrams show that they are depleted in HREE and enriched in LREE. The high Nb/ta ratios in our data indicate metasomatic activity probably linked to amphibole and rutile in the mantle prior to melting. The geodynamic context of spessartite-type lamprophyres indicates a signature linked to late-orogenic to post-collisional subduction. They are late-orogenic to post-collisional lamprophyres enriched in compatible elements (Cr, Ni, Co) and display a negative ta-Nb-Ti (TNT) anomaly. The frequent association of these lamprophyre dykes with the deposits does not indicate the source of the gold for these deposits, but rather zones of crustal permeability capable of draining hydrothermal fluids at the time of emplacement. Good mapping of lamprophyre dykes, especially in shear zones, could therefore guide prospecting and identify potential zones of hydrothermal fluid circulation.

关键词： Nassara Calc-Alkaline Lamprophyre Metasomatic Activity LILE HREE LREE

Phenotypic and Genotypic Antibiotic Resistant Diarrheagenic Escherichia coli Isolated from Patients with Diarrhea in Ouagadougou, Burkina Faso

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Advances in Microbiology 2023年第7期13卷 347-359页

作者： Haoua Cissé Assèta Kagambèga Soutongnooma Caroline Bouda Abdallah Sawadogo Nicolas Barro Laboratoire de Biologie Molé culaire d’Epid&eacutemiologie et de Surveillance des agents Transmissibles par les Aliments (LaBESTA) Universit&eacute Joseph KI-Zerbo Ouagadougou Burkina Faso Ecole Normale Supé rieure (ENS) Ouagadougou Burkina Faso

Background: The emergence and spread of multidrug-resistant bacteria have become a major public health problem worldwide, particularly in developing countries such as Burkina Faso. This study aims to determine phenotypic and genotypic antibiotic resistant diarrheagenic Escherichia coli (DEC) from patients with diarrhea in Ouagadougou, Burkina Faso. Methodology: Microbiological and biochemical analysis were done to detect two hundred and ninety-two (292) strains. The susceptibility of the strains to antibiotics was determined by the agar disc diffusion method. 16-plex-PCR assays were carried out to detect both virulence and resistance genes encoding betalactams, quinolones, phenicols, tetracyclines and virulence gene of DEC. Results: Diarrheagenic Escherichia coli was detected in 8% (23/292) of patients with diarrhea using the 16-plex-PCR and 39.1% (9/23) of the DEC detected carry at least one resistance gene. Resistance rate in disc diffusion test was 86.96% to tetracycline, 65.23% to cotrimoxazole, 17.4% to nalidixic acid, 17.4% to norfloxacin, 17.4% to ciprofloxacin, 13.04% to ceftriaxone, 13.04% to cefotaxime, 8.7% to gentamicin, 8.7% to Chloramphenicol, 0% to netilmicin. The prevalence of different resistance genes in the studied strains varied from 44.4% to 5.5%. The gene Tet coding for resistance to tetracycline was found in 8 strains (44.4%). The Cata gene coding for resistance to Chloramphenicol was detected in 38.9% of isolates. The qnrS, blaSHV and blaOXA genes were each detected in 5.5% of isolates. No strain hosts the qnrA, qnrB and blaTEM genes. Conclusion: This study identified β-lactams, quinolones, phenicols and tetracyclines resistance genes in DEC isolates from patients with diarrhea in Ouagadougou, Burkina Faso. These results indicate the need for a surveillance program to reduce the prevalence of resistance to Enterobacteriaceae strains in hospitals.

关键词： Diarrheagenic Escherichia coli Phenotypic Genotypic Resistance Ouagadougou

Detection of Campylobacter sp. from Poultry Feces in Ouagadougou, Burkina Faso

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Food and Nutrition Sciences 2021年第2期12卷 107-114页

作者： Assèta Kagambèga Alexandre Thibodeau Daniel K. Soro Nicolas Barro Philippe Fravalo Laboratoire de Biologie Moléculaire d’épidémiologie et de surveillance des bactéries et virus transmissibles par les aliments (LaBESTA)/Ecole Doctorale Sciences et Technologies (EDST)/Université Joseph KI-ZERBOOuagadougou Burkina Faso Institut Des Sciences (IDS) Ouagadougou Burkina Faso Veterinary Medicine Faculty Department of Pathology and Microbiology NSERC Industrial Research Chair in Meat-Safety (CRSV) University of Montreal Saint-Hyacinthe QC Canada

Background: Campylobacter contamination in poultry and poultry product has been reported worldwide. The present study aims to determine the prevalence of Campylobacter in poultry feces using selective enrichment Bolton broth and multiplex PCR. Method: Two methods were used in this study: the first was direct plating of poultry feces into mCCDA agar plates. The second, three antibiotics were used at different concentrations to add in Bolton broth supplemented. These antibiotics were Rifampicin (Oxoid, Nepean, Ontario) with 10 mg/L, colistin (Oxoid, Nepean, Ontario) with 1 mg/mL and 2 mg/mL;trimethoprim (Oxoid, Nepean, Ontario) with 10 mg/L. The colonies with typical campylobacter morphology on blood agar (little, red and

Prevalence of Salmonella in Fresh Produce Tomatoes Sold in Open Market in Ouagadougou, Burkina Faso

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Food and Nutrition Sciences 2023年第12期14卷 1259-1268页

作者： Hanseni Bognini Assèta Kagambèga WP Bertrand Tiendrebeogo Abdallah Sawadogo Nicolas Barro Théodore Knight-Jones Michel Dione Laboratoire de Biologie Moléculaire D’épidémiologie et de Surveillance des Bactéries et Virus Transmissibles par les Aliments (LaBESTA)/Ecole Doctorale Sciences et Technologies (EDST)/Université Joseph KI-ZERBO Ouagadougou Burkina Faso Ecole Normale Supérieure Ministère des Enseignement Supérieur de la Recherche Scientifique et de L’innovation Ouagadougou Burkina Faso Animal and Human Health Program International Livestock Research Institute Rue 18 Cité Mamelles BP Ouakam Dakar Senegal

Tomato is a widely consumed vegetable in Burkina Faso and throughout the world. However, when handled improperly, it can serve as a vector of pathogen transmission to human if ingested raw or through cross-contamination with cooked food. This study aimed to determine the prevalence of Salmonella spp from tomatoes sold in the markets of Ouagadougou, Burkina Faso and characteristics of vending conditions. One hundred and ninety-eight (198) different tomato samples were randomly purchased from one hundred and thirteen (113) different vendors in the markets of Ouagadougou. The samples were examined and classified into three categories according to their texture and the level of deterioration. The prevalence of Salmonella spp identification was determined using standard microbiological methods. A survey was conducted using a questionnaire on transport and vending conditions for tomatoes. In total, Salmonella prevalence was 19.19% in all tomato’s samples analyzed and was 18.18% for intact category, 22.73% in D2 category and 16.67% in category D4. The survey revealed poor transport and sales conditions for the majority of tomato sellers. The present study revealed the presence of Salmonella in tomatoes samples. These results highlight the risk associated with the consumption of tomatoes if hygienic practices are not respected during tomatoes handling and preparation. The results of the study also show the need to wash tomatoes systematically after purchase with a disinfectant, especially tomatoes sold in open markets in developing countries.

关键词： Salmonella Tomatoes Hygiene Food Security

Geochemistry of trace elements and Sr-Nd isotopes of foraminifera shell from the Okinawa Trough

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Acta Oceanologica Sinica 2001年第1期20卷 95-103页

作者： Meng Xianwei 1,2 ,Du Dewen 1,2 ,Cheng Zhenbo 11 .FirstInstituteofOceanography ,StateOceanicAdministration ,Qingdao 2 6 6 0 6 1,China2 .KeyLaboratoryofMarineScienceandNumericalModeling ,StateOceanicAdministration ,Qingdao 2 6 6 0 6 1,China First Institute of Oceanography State Oceanic Administration Qingdao 266061 China Key Lab. Mar. Sci. Numer. Modeling State Oceanic Administration Qingdao 266061 China

Trace elemental associations and Sr-Nd isotopic compositions are of important to recognition of biogenic material from mixed marine sediments. The foraminifera shell from the Okinawa Trough strongly enriches Sr,P,Mn and Ba, enriches Li,U,Th,Sc,Co,Cu,Pb,Zn,Cr,Rb,Y,Sb and light rare earth elements,slightly enriches V,ga,Zr,Nb,Cd and middle rare earth elements,is short of Mo,In,Sn,Cs,Hf,ta,W,Ti,Bi and heavy rare earth elements. The mechanism of elemental enrichment in forminifera is the concentrations of trace elements in sea water and selective absorption of trace elements during foraminifera living, as well as the geochemical affinity between major elements and trace *** REE (rare earth elements)partition pattern of foraminifera shell of the Okinawa Trough shows enrichment of middle rare earth elements with slightly negative Ce anomaly,which are different from those of foraminifera of the Pacific *** Sr,Nd isotopic ratios of the Okinawa Trough foraminifera are 0 709 769 and 0 512 162,respectively, which are different not only from those of oceanic water, but also from those of river water of China's Mainland, the former is slightly higher than those of oceanic water,but much lower than those of river water;the latter is slightly lower than those of oceanic water,but higher than those of river water,demonstrating that the Okinawa Trough sea water has been influenced by river water of China's Mainland.

关键词： Foraminifera shell trace element Sr-Nd isotopes

Fournier’s gangrene in a Child Hospitalised in the Paediatric Emergency Department of the gabriel Touré Teaching Hospital

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Open Journal of Pediatrics 2023年第2期13卷 214-219页

作者： Dembélé Adama Cissé Mohamed Elmouloud Togo Pierre tall Koureissi Maïga Belco Keïta Djeneba Doumbia Abdoul Karim Coulibaly Oumar Issa Amadou Ahamadou Ibrahim Coulibaly Bakary Traoré Kalirou Togo Boubacar Department of Paediatrics Gabriel Touré Teaching Hospital Bamako Mali Bamako Dermatological Hospital Bamako Mali Department of Paediatric Surgery Bamako Mali

Fournier’s gangrene is a form of necrotizing fasciitis that has multiple causes and is relatively uncommon in children. We report a case of Fournier’s gangrene of infectious origin in a 12-month-old infant following... 详细信息

关键词： Pediatrics Infant Fournier’s gangrene Insect Bite

Epidemiological and Clinical Aspects of Chronic Renal Failure in the Medical Department at the Hospital of Sikasso

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Open Journal of Nephrology 2023年第1期13卷 57-66页

作者： Djénéba Maïga Drissa Goïta Magara Samaké Aboudou Messoum Dolo Yohanna Koné Aboubacar Sidiki Fofana Seydou Sy Moctar Coulibaly Atabième Kodio Sahdit Baba Coulibaly Saharé Fongoro Nephrology Unit of Sikasso Hospital Sikasso Mali National Center for Scientific and Technological Research (CNRST) Bamako Mali Service de Médecine CHU Mère-Enfant le Luxembourg Bamako Mali Nephrology Unit of the Fousseyni DAOU Hospital Kayes Mali Nephrology and Hemodialysis Service CHU du Point-G Bamako Mali Faculty of Medicine of Bamako Bamako Mali Nephrology Unit of Mali gaVARDO Hospital of Sebenicoro Bamako Mali

Introduction: Chronic renal failure is a real public health problem because of its prevalence, the cost of its management and the high morbidity and mortality rate associated with it. The objective of this study was to determine the frequency, causes and main aggravating factors of chronic renal failure in the medical department of the hospital of Sikasso. Materials and Methods: This was a cross-sectional, retrospective, descriptive study conducted in the medical department of the Sikasso hospital from January 1, 2021 to November 30, 2022. It covered all the records of patients with chronic renal failure hospitalized in the department during this period. The MDRD formula was used to estimate the glomerular filtration rate. The KDIGO 2012 classification was used to stage CKD. Results: Of 820 patient records reviewed, we retained 197 records. The mean age of our patients was 42.25 ± 10 years. The male sex represented 114 (57.9%). The socio-economic level was considered low and precarious in 79.8% of cases. The frequency of chronic renal failure was 24%. The reason for hospitalization was mostly hyper creatinine > 185 μmol/l (92.4%). Herbal medicine was reported in 103 cases (52.3%). Medical history was hypertension 101 cases (51.3%), undocumented gastro duodenal ulcer (UGD) 14 cases (7.6%), hypertension and diabetes 11 cases (5.1%), diabetes 8 cases (4%), lower limb edema 9 cases (4.6%). Hypocalcemia was 147 cases (75.6%) with hyper phosphoremia was 153 cases (77.7%). Hemoglobin level was: tage 5, 171 cases (86.8%), stage 4, 11 cases (5.6%), stage 3, 13 cases (6.6%) and stage 2, 2 cases (1%.) Dialysis was performed in 1095

关键词： Epidemiology Clinical Chronic Renal Failure Sikasso Mali

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陕西省城市化水平测度及时空演变分析

资源开发与市场 2016年第6期32卷 658-663页

作者：塔嘎塔师谦友陕西师范大学旅游与环境学院陕西西安710119

从人口、经济、土地和社会四个方面构建了综合评价指标体系,对2002年、2007年和2013年陕西省城市化水平进行了测度,从时空两个维度上进行了动态分析。时间上分析了综合城市化水平、子系统城市化水平和各市城市化水平的演变,空间上分析... 详细信息

从人口、经济、土地和社会四个方面构建了综合评价指标体系,对2002年、2007年和2013年陕西省城市化水平进行了测度,从时空两个维度上进行了动态分析。时间上分析了综合城市化水平、子系统城市化水平和各市城市化水平的演变,空间上分析了综合城市化及其子系统的层级结构的演变,借助Arc GIS进行了可视化表达。结果表明:陕西省城市化进程加快,但整体水平偏低;城市化发展水平具有明显的区域差异特征;城市化层级结构之间的协调性不强;城市化空间分布格局各异。

关键词：城市化水平测度时空演变陕西省