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Journal of Water Resource and Protection 2013年第12期5卷 1242-1246页

作者： Yewegnon Alima Esther Irma Nougbode Cokou Pascal Agbangnan Alain Yaya Koudoro Comlan Achille Dedjiho Martin Pepin Aina Daouda Mama dominique codjo koko sohounhloue Laboratoire d’Hydrologie Appliquée(LHA) Facultédes Sciences et TechniquesUniversite d’Abomey-CalaviCotonouRépublique du Bénin Laboratoire d’Etude et de Recherche en Chimie Appliquée(LERCA) Ecole Polytechnique d’Abomey Calavi(EPAC)Universite d’Abomey-CalaviCotonouRépublique du Bénin

This study was performed in laboratory scale and consisted of the using of aqueous Opuntia dillenii solution for the clarification of very turbid surface water (Turbidities varying between 186 NTU and 418 NTU). This plant from Cactaceae family was used as a natural coagulant for the different clarification tests. The preliminary phytochemical Screening of the powder of this plant showed that it contains tanins, saponins and mucilages. Flocculation and coagulation tests showed that Opuntia dillenii can be used in highly turbid water treatment. The removal efficiency varied from 89% to 93% for the turbidity and suspended solids, and from 4% to 15% for the obvious color in water when we used the optimum values of this natural coagulant (1 mL to 10 mL). The successive addition of this natural coagulant and the lime, gave a better elimination of turbidity and suspended solids, and a good reduction for the color. The removal efficiency of the turbidity and suspended solids became more than 95% and the one of the color between 67% and 94%.

关键词： Natural Coagulant Opuntia dillenii Lime Phytochemical Screening Turbidity Suspended Solids

Antibacterial Activity of Essential Oil of Aeollanthus pubescenson Multidrug Resistant Strains of Salmonellaand Escherichia coliIsolated from Laying Hens Farming in Benin

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Advances in Microbiology 2019年第9期9卷 804-823页

作者： Aguidissou Oscar Nestor Boko Kadoeito Cyrille Sessou Philippe Yovo Mahudro Komagbe S.Gwladys Ayihou Yannick Alitonou Guy Alain Avlessi Felicien Farougou Souaï bou sohounhloue koko codjo dominique Unite de Recherche sur les Maladies Transmissibles Laboratoire de Recherche en Biologie AppliqueeEcole Polytechnique d’Abomey-CalaviUniversite Abomey-CalaviCotonouBenin Laboratoire d’etude et de Recherche en Chimie Appliquee Ecole Polytechnique d’Abomey-CalaviUniversite Abomey-CalaviCotonouBenin

Infections due to Escherichia coli and Salmonella are of the major constraints for the laying hen’s industry as they cause mortality and serious economic losses. The use of conventional antibiotics to control bacterial has shown limits because it allows multidrug-resistance. The main objective of this study was to assess the antibacterial activity of essential oil from Aeollanthus pubescens on multidrug resistant strains of Salmonella and Escherichia coli isolated from laying hens faming in the department of Atlantique in Benin. Altogether, 11 strains of Salmonella and 16 strains of Escherichia coli have been isolated from 101 samples of different organs including liver, spleen, lung, feces and yolk according to standardized methods and their biochemical profile using API 20E gallery. Test of sensitivity was carried out on 11 antibiotics of six different families on identified strains in order to determine their resistance profile. A sensitivity test was carried out on multi-drug resistant strains with Aeollanthus pubescens essential oil to determine their sensitivity with regard to this essential oil. The results showed that the majority of Salmonella strains presented resistance to Tetracyclines (72.7%) and Sulfonamides (63.6%) and all Escherichia coli strains are resistant to Sulfonamides (100%) followed by Tetracycline (93.75%) and Ampicillin (75%). Aeollanthus pubescens essential oil was active on all the multi-drug resistant strains investigated with Minimal inhibitory concentration varying from 0.41 ± 0 mg/ml to 0.83 ± 0 mg/ml for Salmonella and from 0.41 ± 0 mg/ml to 1.66 ± 0 mg/ml for Escherichia coli (P Salmonella and the multi-drug resistant Escherichia coli investigated. Those results provide alternatives to control poultry bacterial pathologies in Republic of Benin. However, disease due to Escherichia coli and Salmonella must be taken more seriously and study on their resistance to antibiotic must be deepened as well.

关键词： Laying Hens Escherichia coli Salmonella Antibiore-sistance Aeollanthus pubescens

Level of Exposure of Populations to Atmospheric Pollution in Southern Benin

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Open Journal of Air Pollution 2023年第4期12卷 160-181页

作者： Sèdami codjo Joël Dossou-Gbete dominique Kpadonou Gbaguidi Magloire Acakpo Nonvignon Vitalique Elegbede Alassane Youssao Abdou Karim Kpessou Virtus Mickael Saizonou Firmin Léonce Dovonon Doctoral School of Exact and Applied Sciences University of Abomey-Calavi (UAC) Abomey-Calavi Benin Applied Chemistry Study and Research Laboratory Department of Chemical Engineering-Processes (GC-P) Ecotoxicology and Quality Study Research Unit Polytechnic School of Abomey-Calavi University of Abomey-Calavi Abomey-Calavi Benin

This study focuses on monitoring the exposure of populations in South Benin to atmospheric pollution. Thirteen (13) monitoring points were identified where the Air quality measurements were taken using autonomous electronic devices called “Air Quality Monitor”. Calibrated and turned on, the measuring device automatically determines the concentrations of carbon dioxide CO2, Total Organic Compounds, methanal (HCHO), particulate matter PM2.5 and PM10, temperature in degrees Fahrenheit and relative humidity (RH). Per site, air pollution levels are recorded for 5 minutes every 30 minutes from 7 a.m. to 6 p.m. After the analyses, it appears that the carbon dioxide CO2 contents vary from 400 to 1444 ppm with an average of 486.80 ± 184.3 ppm, the daily contents of Total Volatile Organic Compounds from 0.01 to 6 .91 mg/m3 with a daily average of 0.36 ± 0.65 mg/m3, aldehydes from 0.005 to 3 mg/m3 with an average of 0.05 ± 0.17 mg/m3, for particulate matter of diameters less than or equal to 2.5 μm (PM2.5) pollution levels vary between 5 and 173.8 μg/m3 with an average of 21.5 ± 17.62 μg/m3. On the other hand, for PM10, the contents vary from 5 to 449.6 μg/m3 with an average of 28.17 ± 31.74 μg/m3, the Air Quality Index (AQI) varies from 0, 3 to 243 with an average of 39 ± 33.16. From the results observed, it appears that the south-western part of South Benin is heavily polluted by CO2, Total Volatile Organic Compounds, PM10 and especially PM2.5 with the city of Cotonou at its head, in particular the Red Star crossroads, the Toyota crossroads and the crossroads after the friendship stadium. The impacts of this pollution could be significant on sensitive people such as the elderly, newborns and patients with acute and chronic respiratory illnesses.

关键词： Ambient Air Quality Southern Benin Cotonou Atmospheric Pollution

Distribution of Atmospheric Pollution in Southern Benin

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Open Journal of Air Pollution 2024年第1期13卷 23-55页

作者： Dossou-Gbete Sèdami codjo Joël Kpadonou dominique Gbaguidi An Magloire Elegbede Vitalique Saizonou Kpèssou Virtus Mickael Youssao Abdou Karim Alassane Dovonon Firmin Léonce Vodounnon Armand Doctoral School of Exact and Applied Sciences University of Abomey-Calavi (UAC) Abomey-Calavi Benin Ecotoxicology and Quality Study Research Unit Applied Chemistry Study and Research Laboratory Department of Chemical Engineering-Processes (GC-P) Polytechnic School of Abomey-Calavi University of Abomey-Calavi Abomey-Calavi Benin Africa Synergy Group Plus Cotonou Benin

This study focuses on air quality in southern Benin in order to show public authorities what the Beninese populations are exposed to for efficient decision-making. Two sampling campaigns were carried out, one in the wet period and the other in the dry season. The measurements were taken using a monitor called an “Air Quality Monitor”. For data processing, the multiple comparison methods of Dun (1961) and the Wilcoxon test were used. To maintain legitimacy, all spatial data were included in the official cartographic repository of Benin: WGS 1984, Transverse Mercator Universe Projection (UTM), Zone 31 North. The Moran statistic was used to measure the levels of spatial autocorrelation of the variables studied and to test the significance. In order to locate the spatial subsets, the local spatial association indices of Anselin Local Moran and Getis-Ord, Gi* were used. In terms of results, on the 13 monitoring sites and the 8 parameters chosen to determine air quality, we do not note any significant inter-seasonal difference. Of the eight parameters, only three parameters present spatial autocorrelation leading to predictions of ambient air quality over the entire study area based on the distance separating the points, namely, PM2.5, PM10 and ambient air quality index (AQI). The localities affected by atmospheric pollution in South Benin are located in the south-western part of Benin, headed by Cotonou, which is heavily polluted by CO2, TCOV, PM10 and PM2.5.

关键词： Spatial Distribution Atmospheric Pollutants Southern Benin

Complications of Peripartum Cardiomyopathy at the Departmental University Hospital Teaching of Borgou (Benin) in 2022: About 3 Cases

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World Journal of Cardiovascular Diseases 2022年第11期12卷 514-526页

作者： Léopold Houétondji codjo Serge Hugues Mahougnon Dohou Sèdjro Raoul Atade Fabrice Atika Hamondji Nicolas Amegan Chabi Olaniran Alphonse Biaou Kayivi Murielle Hounkponou Djidjoho Arnaud Sonou Mahouna Philippe Adjagba Marielle Dorine Soude dominique Sacca Mèdéssè Rolande Quenum Aude Sourou Bodjrenou Martin Dèdonougbo Houenassi Cardiology Teaching and Research Unit (CNHU-HKM) Faculty of Health Sciences University of Abomey Calavi Cotonou Benin Teaching and Research Unit in Cardiology (CHUD-B/A) Faculty of Medicine University of Parakou Parakou Benin Teaching and Research Department of Gynecology and Obstetric (CHUD-B/A) Faculty of Medicine University of Parakou Parakou Benin Doctoral School of Health Sciences University of Abomey Calavi Cotonou Benin Regional Institute of Public Health University of Abomey Calavi Cotonou Benin Cardiology Teaching and 6 Research Unit (CHU-MEL) Faculty of Health Sciences University of Abomey Calavi Cotonou Benin Cardiology Department of Atacora-Donga Department Hospital Center (CHD-A/D) Natitingou Benin Teaching and Research Unit in Cardiology Faculty of Medicine (CHU-OP) University of Abomey Calavi Cotonou Benin

Introduction: Peripartum cardiomyopathy (PPCM) is a dilated cardiomyopathy occurring in the last month of pregnancy or the first five months postpartum without pre-existing cardiovascular pathology. It is a major cause of pregnancy-related heart failure with high morbidity and mortality. In severe forms (10% to 15% of cases), thrombo-embolic complications are the main cause. The initial hemodynamic evolution is totally unpredictable and sometimes extremely brutal and fatal. The objective of this work was to show the often pejorative evolution of PPCM in our country. Methods: We report in this work three serious clinical cases revealing the complications of this PPCM among patients admitted to the cardiology department of the CHUD-B/A in 2022 for heart failure. The data were collected according to the Declaration of Helsinki. Patients and Observations: The first case was a PPCM with severe left ventricular (LV) systolic dysfunction complicated by spontaneous left intraventricular contrast and right superficial sylvian ischemic stroke. The second case reports a global cardiac decompensation of a PPCM with severe LV systolic dysfunction complicated by an apical thrombus. The third case is that of a state of cardiogenic shock complicating a PPCM with severe LV systolic dysfunction. Among our 03 patients presenting these severe forms of PPCM, the evolution, in spite of the symptomatic and prognostic treatments of the heart failure, and even of the complications, was unfavourable with death in two of them. Conclusion: Complications of PPCM are frequent and fatal in Benin.

关键词： Cardiomyopathy Peripartum Complications Parakou Benin