A5110944181- Fecal contamination and water quality
- Vibrio bacteria research studies
- Groundwater flow and contamination studies
- Essential Oils and Antimicrobial Activity
- Moringa oleifera research and applications
- Microplastics and Plastic Pollution
- Child Nutrition and Water Access
- Ethnobotanical and Medicinal Plants Studies
- Bacterial biofilms and quorum sensing
- Recycling and Waste Management Techniques
- Bacillus and Francisella bacterial research
- Brucella: diagnosis, epidemiology, treatment
- biodegradable polymer synthesis and properties
- Microbial Community Ecology and Physiology
- Endodontics and Root Canal Treatments
- Legionella and Acanthamoeba research
- Water Quality and Pollution Assessment
- Phytochemistry and biological activity of medicinal plants
- Aquatic Ecosystems and Biodiversity
- CO2 Sequestration and Geologic Interactions
- Water Treatment and Disinfection
- Salmonella and Campylobacter epidemiology
- Antibiotic Resistance in Bacteria
- Soil and Water Nutrient Dynamics
- Antimicrobial agents and applications
University of Maroua
2020-2024
Université de Yaoundé I
2010-2020
The main problem about plastic packaging after their use is the fate of waste disposed into environment. This study was carried out in aquatic microcosm and aimed at assessing impact temperature an acidic environment on polyethylene degradation by bacterium Pseudomonas aeruginosa, as well electrical conductivity medium temporal abundance dynamics cells involved. Sterilized pieces 0.08 g weight were immersed sterile mineral solutions pH 5 glass flasks containing P. aeruginosa concentration...
Abstract This study was aimed at assessing the prevalence of pathogenic E scherichia coli strains, relative to total count . , faecal coliforms and other heterotrophic mesophilic aerobic bacteria ( HMAB ) isolated in groundwater equatorial region C ameroon entral A frica). Bacteria were using standard methods. Pathogenic strains then identified haemagglutination antisera tests. The maximum abundance 4.9 × 10 6 5.6 3 1 colony‐forming units CFU )/100 mL respectively. reached /100 counts...
The synergistic effects of the combined treatments NaOCl and H 2 O on elimination A. hydrophila adhered to polythene under static dynamic conditions were evaluated. concentrations 0.1, 0.2, 0.3<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" id="M1"><mml:mrow><mml:mtext>‰</mml:mtext></mml:mrow></mml:math> 0.5, 1, 1.5<mml:math id="M2"><mml:mrow><mml:mtext>‰</mml:mtext></mml:mrow></mml:math> used. contact periods 180, 360, 540, 720 minutes. abundance cells reached 2.47 2.27 units (log...
Abstract Microorganisms' retention in soil contributes to the natural purification of groundwater. Bacteria found groundwater are generally various shapes. The aim this study was assess importance cell shape and flagella bacterial during polluted water percolation through two columns CA CB, equatorial region Central Africa. Percolation tests were carried out using different loads samples which contaminated by Escherichia coli (straight rods, peritrichous flagella), Vibrio parahaemolyticus...
This study assessed the antibiotics susceptibility of Bacillus cereus, B. thuringiensis and subtilis strains isolated in wells rainwater samples Yaounde (Cameroon). Water were collected monthly during a long dry season (LDS), short (SDS), rainy (LRS) (SRS), LRS SRS for rainwater. The considered included Imipenem, Amikacin, Gentamycin, Ciprofloxacin, Ofloxacin, Sulfamethazol, Tetracycline. With from groundwater, antibiotic inhibition diameters varied 9.13 mm (Sulfametazole SDS) to 32.78...
The impact of light (1,000 × 100,000 lx) on the inactivation S. aureus and V. parahaemolyticus has been assessed under different concentrations dissolved biodegradable organic compound (BOC) at pH 7.0. First, a gradual decrease in number cultivable cells was observed. Secondly, cell reactivation observed it marked absence BOC. In BOC, lowest value inhibition rate (CIR) during first 3 h 0.138 h(-1) for 0.218 parahaemolyticus. presence 10,100 1,000 mg/l 0.196 h(-1), 0.243 0.257 respectively,...
The main purpose of this investigation was to rank, in hierarchical order, some soil chemical factors that impact the sorption parameters fecal indicator bacteria and Salmonella sp, during their transfer from surface groundwater table. Sorption coefficients (Kf) linearity exponents (Ϫ) were obtained using Freundlich isotherm. When sp present alone, values Kf varied 2.70 log units mg−1 7.84 soil, Ϫ 0.04 2.70. two present, 0.48 8.53 0.06 1.19. mixed, 1.73 7.70 0.09 0.88. predominant...
The present study assessed the abiotic factors of Moringa stenopetala (M. stenopetala) extracts against Staphyloccoccus aureus in aquatic microcosm. Bacterial survival was using colony forming unit (CFU) method on culture agar medium at different concentration levels (0.5 to 2 g/L). incubation duration varied from 3 24 hours, and temperatures were between 7°C 44°C. Phytochemical screening showed that most constituents obtained are alkaloids, flavonoids tannins. It observed increase extract...
The present study aims to assess the temporal variations of some biotic and abiotic biodegradation parameters 2 polymers (LDPE PP) by bacteria P. aeruginosa S. aureus at acidic, neutral, alkaline pH under mesophilic conditions. LDPE PP fragments were immersed in mineral solutions free carbon sources containing or cells. initial values (pHi) 5, 7 9. Incubation was carried out 28°C for 10, 20, 30, 40, 50 60 days. Results showed that during incubations, varies over time. In most cases,...
As water resources in urban areas are becoming increasingly degraded, due large part to poor sanitation, a study has been was conducted examine the influence of physicochemical parameters and seasonal variation on distribution enterobacteria &lt;i&gt;Escherichia coli&lt;/i&gt; &lt;i&gt;Salmonella &lt;/i&gt;spp that have isolated from streams city Yaounde. Bi-monthly samples were collected nine rivers during 12 months (April 2010 March 2011). The isolation...
Une étude a été conduite dans le but de déterminer la dynamique d’abondance des bactéries les échantillons d’eaux souterraines en condition stockage. Les d’eau analysés ont obtenus sources et puits Yaoundé. La durée stockage 144 heures chaque échantillon stocké duplicat deux bidons, l’un ouvert l’autre fermé analysé toutes 24 heures. techniques dénombrement germes utilisées celles membranes filtrantes d’étalement surface. abondances bactériennes eaux, aux jours prélèvement, atteignent...
A bacteriological and physicochemical study was conducted in the waters of farms mountainous regions Cameroon. The different water samples were collected during two campaigns December 2018 February 2019. Ten stations representing drinking supply points our area identified. results showed that these contained both pathogenic commensal fecal bacteria. highest abundances reached 10x103 CFU/100mL for Salmonella sp., 72x103 Staphylococcus aureus, 102x103 Brucella suis 40x103 abortus. These...
Abstract Maroua, the capital of Far North Cameroon, is frequently affected by outbreaks waterborne diseases. Waters stored through public clay pots are common in city and provided voluntarily individuals for drinking ablution. Yet, such service water lacks management surveillance. If contaminated, may pose infection transmission risks diseases among population. The quality 95 randomly selected was assessed isolation count Total Coliforms (TCs) Escherichia coli . Also analyzed bacteriological...
This study aimed at assessing the MICs (Minimum Inhibitory Concentrations) and MBCs Bactericidal of methanolic extracts from 4 different parts (leaves, seeds, stem, roots) plant Moringa oleifera against bacteria E. coli S. aureus. Phytochemical profile each extract has been determined using LC/MS analyses. Microbial analyses were done 96-wells plate method. Results showed that four on plants contain heterosides glucosinolates. Iridoids found in leaves, stem roots. Flavonoids leaves stem....
This study was aimed at evaluating the effect of aqueous extract Eucalyptus microcorys on bacterial cells Salmonella typhi adhered to polythene fragment different cell growth phases in aquatic microcosm. The that have been considered are lag, exponential, stationary and decline phases. analyzes were performed static conditions. duration adhesion process (DCAP) used allow 3h, 6h, 9h, 24h. Polythene fragments containing bacteria known amount then introduced into solution concentrations (10,15...