To highlight the continuous cultivation of soil on biodiversity in savannas of Korhogo in the north of Côte d'Ivoire, termites were studied with regard to their use as bio-indicators of habitat change in the tropics. Using a... more
To highlight the continuous cultivation of soil on biodiversity in savannas of Korhogo in the north of Côte d'Ivoire, termites were studied with regard to their use as bio-indicators of habitat change in the tropics. Using a standardized method, termites were sampled in five types of plots (PCR 1, PCR 2, PCR 3, PCR 10 and PCR 30) which age of continuous cultivation varies from 1 to 30 years in comparison with the primary savanna. The diversity of termites has differed statistically between the habitat types. The species richness highest in the primary savanna (24 species), decreases progressively with the continuous cultivation of soil to reach lowest in the elderly cultures plots PRC 30 (9 species), either 64 % of reduction. Continuous cultivation of soil causes a drastic reduction in soil-feeders group (75 % of reduction on PCR 2). But there was no significant change in termites' diversity between the savanna and the recent culture PCR 1. The cultivation of soil would have...
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<b>Copyright information:</b>Taken from "Spatially-explicit risk profiling of infections at a small scale: a geostatistical modelling approach"http://www.malariajournal.com/content/7/1/111Malaria Journal... more
<b>Copyright information:</b>Taken from "Spatially-explicit risk profiling of infections at a small scale: a geostatistical modelling approach"http://www.malariajournal.com/content/7/1/111Malaria Journal 2008;7():111-111.Published online 23 Jun 2008PMCID:PMC2475523.
<b>Copyright information:</b>Taken from "Spatially-explicit risk profiling of infections at a small scale: a geostatistical modelling approach"http://www.malariajournal.com/content/7/1/111Malaria Journal... more
<b>Copyright information:</b>Taken from "Spatially-explicit risk profiling of infections at a small scale: a geostatistical modelling approach"http://www.malariajournal.com/content/7/1/111Malaria Journal 2008;7():111-111.Published online 23 Jun 2008PMCID:PMC2475523.
Spatial risk profiling of Plasmodium falciparum parasitaemia in a high endemicity area in Côte d'Ivoire
Schistosomiasis is a considerable public health problem in Cote d’Ivoire, particularly in rural area. This study was carried out in location of Ahoue southern Cote d’Ivoire, sub-prefecture of Brofodoume. The objective was to assess the... more
Schistosomiasis is a considerable public health problem in Cote d’Ivoire, particularly in rural area. This study was carried out in location of Ahoue southern Cote d’Ivoire, sub-prefecture of Brofodoume. The objective was to assess the epidemiology of schistosomiasis among school children in Ahoue located near a dam. Overall, 122 school children provided urine and stool sample. Stool samples were subjected to the method of Kato-katz, while urines samples analysed using urine filtration method. The results of the analyses of the urine and the stool revealed that the prevalence of urinary schistosomiasis and intestinal schistosomiasis was 24, 59% and 6, 56% respectively. The differences between the prevalence of schistosomiases, the sex and the age brackets are not significant (P> 0,05). Of all infected children, more half (73, 33%) had light parasite density for urinary schistosomiasis and high parasite density (50%) for intestinal schistosomiasis. A questionnaire was administered...
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Studies done in Bouaké (Côte d’Ivoire) about 20-yr ago reported that Anopheles gambiae s.l. Giles was the major malaria vector. The present study aimed to update these data and to identify the main vectors. Mosquitoes were collected in... more
Studies done in Bouaké (Côte d’Ivoire) about 20-yr ago reported that Anopheles gambiae s.l. Giles was the major malaria vector. The present study aimed to update these data and to identify the main vectors. Mosquitoes were collected in Allokokro and Petessou villages between June 2014 and December 2015 using the human landing catching method. Potential breeding sites of An. gambiae s.l. were identified in August and October 2014 and mapped using GPS. Anopheles species were morphologically and molecularly [polymerase chain reaction (PCR)] identified. Ovaries of female were dissected to determine the parity and infection with Plasmodium was detected in head and thorax by quantitative PCR. In Allokokro, the biting rate of An. gambiae s.s was significantly greater than Anopheles coluzzii, whereas, in Petessou, biting rates of both species were comparable. Plasmodium falciparum (Haemosporida: Plasmodiidae), Plasmodium malariae (Haemosporida: Plasmodiidae), and Plasmodium ovale (Haemospor...
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To better understand the influence of periodic mass distribution of Long-Lasting Insecticidal Nets (LLINs) on malaria transmission, a 1-yr entomological survey was conducted in three major districts of Côte d’Ivoire. Mosquitoes were... more
To better understand the influence of periodic mass distribution of Long-Lasting Insecticidal Nets (LLINs) on malaria transmission, a 1-yr entomological survey was conducted in three major districts of Côte d’Ivoire. Mosquitoes were sampled by Human Landing Catches (HLC) in urban and rural areas of San Pedro and Abidjan (coastal), and in Yamoussoukro (central). Mosquitoes were identified morphologically and by molecular methods. The Plasmodium falciparum circumsporozoite (CSP) indices were measured by ELISA, and the Entomological Inoculation Rates (EIR) were calculated for each species and area. Anopheles gambiae s.l. Giles (Diptera: Culicidae) and Anopheles nili Theobald (Diptera: Culicidae) were identified in coastal districts, while An. gambiae s.l. and Anopheles funestus Giles (Diptera: Culicidae) were reported in the central district. In urban areas, malaria vectors showed a low aggressiveness (<10 bites per person per night), except in Yamoussoukro, where up to 18.9 b/p/n w...
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To better understand the influence of periodic mass distribution of Long-Lasting Insecticidal Nets (LLINs) on malaria transmission, a 1-yr entomological survey was conducted in three major districts of Côte d’Ivoire. Mosquitoes were... more
To better understand the influence of periodic mass distribution of Long-Lasting Insecticidal Nets (LLINs) on malaria transmission, a 1-yr entomological survey was conducted in three major districts of Côte d’Ivoire. Mosquitoes were sampled by Human Landing Catches (HLC) in urban and rural areas of San Pedro and Abidjan (coastal), and in Yamoussoukro (central). Mosquitoes were identified morphologically and by molecular methods. The Plasmodium falciparum circumsporozoite (CSP) indices were measured by ELISA, and the Entomological Inoculation Rates (EIR) were calculated for each species and area. Anopheles gambiae s.l. Giles (Diptera: Culicidae) and Anopheles nili Theobald (Diptera: Culicidae) were identified in coastal districts, while An. gambiae s.l. and Anopheles funestus Giles (Diptera: Culicidae) were reported in the central district. In urban areas, malaria vectors showed a low aggressiveness (<10 bites per person per night), except in Yamoussoukro, where up to 18.9 b/p/n w...
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Research Interests: Biology and Cote D Ivoire
Research Interests: Biology and Cote D Ivoire
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We report baseline findings before the implementation of a 4-year intervention trial designed to assess the impact of three different school-based treatment schedules with praziquantel to sustain the control of intestinal schistosomiasis.... more
We report baseline findings before the implementation of a 4-year intervention trial designed to assess the impact of three different school-based treatment schedules with praziquantel to sustain the control of intestinal schistosomiasis. The baseline survey was conducted in 75 schools of western Côte d'Ivoire previously identified with moderate Schistosoma mansoni endemicity (prevalence = 10-24% in children aged 13-14 years). Three stool samples collected over consecutive days were subjected to duplicate Kato-Katz thick smears. A questionnaire was administered to collect village-specific information that is relevant for schistosomiasis transmission. Overall, 4,953 first graders (aged 5-8 years) and 7,011 schoolchildren (aged 9-12 years) had complete parasitologic data. The overall prevalence of S. mansoni was 5.4% among first graders and 22.1% in 9- to 12-year-old children. Open defecation was practiced in all villages. The current baseline findings will be important to explain...
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Here we describe a new, extremely thermophilic amoeba growing between 33° C and 57° C (T opt.= 50° C). Isolates had been obtained from hot springs at Agnano Terme (Italy), Yellowstone National Park (USA), Kamchatka (Russia), and the... more
Here we describe a new, extremely thermophilic amoeba growing between 33° C and 57° C (T opt.= 50° C). Isolates had been obtained from hot springs at Agnano Terme (Italy), Yellowstone National Park (USA), Kamchatka (Russia), and the Arenal Volcano (Costa ...
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La large repartition de l'endemie palustre dans le monde et la progression inexorable de la chloroquino-resistance sont une realite desormais bien vivante en Cote d'Ivoire. Dans les regions de faible immunite, la prevalence des... more
La large repartition de l'endemie palustre dans le monde et la progression inexorable de la chloroquino-resistance sont une realite desormais bien vivante en Cote d'Ivoire. Dans les regions de faible immunite, la prevalence des souches resistantes s'accroit progressivement. La sensibilite in vitro de quarante-sept (47) isolats de Plasmodium (P.) falciparum provenant de malades atteints de paludisme simple a ete etudiee en culture in vitro dans un milieu complet (RPMI 1640) supplemente d'Hepes, de bicarbonate de sodium et de serum humain. Cette etude a ete realisee en debut de saison de pluie. Les resultats ont donne un indice plasmodique general de 60 %, un indice d'infection de 98 % pour P. falciparum et 1,31 % pour P. malariae. La sensibilite in vitro a la chloroquine a ete de 67 % contre 32 % de resistance.
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Les cultures vivrieres comme le riz et le mais sont frequemment attaquees par des termites depredateurs. Dans le but de quantifier ces attaques et de comparer les effets de divers traitements insecticides, desparcelles ont ete etablies en... more
Les cultures vivrieres comme le riz et le mais sont frequemment attaquees par des termites depredateurs. Dans le but de quantifier ces attaques et de comparer les effets de divers traitements insecticides, desparcelles ont ete etablies en zone de savane preforestiere (Lamto et Booro-Borotou). L'abondance des termites en milieu cultive a ete estimee par echantillonnage selon des prelevements de carres de fouille et de tariere. Les populations de termites (en majorite des termites champignonnistes) representent de 62,15 a 89,67 % de l'effectif de la macrofaune du sol. Les plants de riz et de mais ont ete attaques a n'importe quel stade phenologique et tous les organes (feuilles, tiges, fruits, racines) peuvent etre affectes. Au niveau des racines, l'evaluation du taux de presence des termites indique que le mais est plus attaque que le riz. Ce sont les termites du genre Microtermes qui paraissent les plus nuisibles a ces cultures. Les traitements chimiques au Regent (F...
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The aim of this study was to test the efficacy of new kinds of insecticides i.e. Neonicotinoids on cocoa mirids to confirm the minimum effective dose of IMIDOR SL 200 and to determine the number of treatments applied per year following... more
The aim of this study was to test the efficacy of new kinds of insecticides i.e. Neonicotinoids on cocoa mirids to confirm the minimum effective dose of IMIDOR SL 200 and to determine the number of treatments applied per year following the development of the population over time after spraying the insecticide. Study was conducted in the center of Ivory Coast in state owned plantations in Toumokro near Yamoussoukro. Results of the study revealed that mirids have found generally very sensitive to various level of insecticide used. The efficacy of IMIDOR SL 200 substance proved best @ doses of 0.175 L/ha and 0.150 L/ha, and it is showing effectiveness just like CABOSSE PLUS 50 EC and CONFIDOR. These substances effectively control mirids. The recommended minimum dose that controls at least 90% of mirids was 0.150 L/ha or 30 g.ai/ha. From the results of the study it can be concluded that two times per year application are sufficient to protect cocoa trees against mirids. AKPESSE Akpa Ale...
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Malaria vectors are supposedly uncommon in urban areas owing to the lack of suitable breeding sites for their development. However, the maintenance in urban areas of traditional rural practices along with humanitarian crisis can create... more
Malaria vectors are supposedly uncommon in urban areas owing to the lack of suitable breeding sites for their development. However, the maintenance in urban areas of traditional rural practices along with humanitarian crisis can create favorable conditions for malaria transmission. This study aimed to provide relevant entomological data on the risk of malaria transmission in the city of Bouaké, after the military-political crisis from 2002 to 2011 in Côte d'Ivoire. Adults mosquitoes were collected by human landing catches in Dar Es Salam, Kennedy and N'gattakro neighborhoods. Potential breeding sites were georeferenced and mapped using a GPS. Mosquito species were identified morphologically and by molecular methods. Plasmodium infections were detected by quantitative PCR. Anopheline larvae were found in rice and vegetable crops, puddles, and footprints. A total of 939 Anopheles gambiae s.l. were caught during the surveys. The average human biting rate was 8.8 bites/person/night. The A. gambiae s.l. species were A. gambiae s.s (89.6%) and Anopheles coluzzii (10.4%). The average infectivity rate was 0.74% and the average annual entomological inoculation rate was estimated at 19 infected bites/person/year ranging from 0 in Dar Es Salam and N'gattakro to 58 in Kennedy. The risk of malaria transmission exists in Bouaké city, although Plasmodium infections are low.
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To show the impact of human activity on biodiversity in humid equatorial region, termites, insects recognized as bio-indicators of climate change in the tropics were studied in two habitats: The National Center for Floristic (CNF), a... more
To show the impact of human activity on biodiversity in humid equatorial region, termites, insects recognized as bio-indicators of climate change in the tropics were studied in two habitats: The National Center for Floristic (CNF), a preserved habitat for 51 years and the Campus of Cocody (CC), a strongly anthropic environment. Termites were sampled using a standardized method designed for rapid assessment of termite. In both areas, 18 species were collected, 17 species in CNF and 7 species in the Campus area. Significant change in diversity was found between the CNF and the Campus area. In addition, the relative abundance of termites showed a significantly greater decline in the Campus area. The highest abundance of termites was obtained in the CNF (2.95 ind./sections) unlike the Campus area where the relative abundance was 1.55 ind./section. Shannon and Simpson diversity index recorded in the CNF was higher than those of the Campus area. The low similarity index calculated (0.38) ...
Research Interests: Geography, Environmental Science, Conservation Biology, Marine Protected Areas, Biodiversity, and 10 moreEnvironmental Sustainability, Protected areas, Climate Change and Biodiversity, Natural protected areas, Biodiversity Conservation, Biodiversity Research, Human Activity Recognition, Termites, Protected Areas, and Human Activity Pattern
Ancistrotermes cavithorax, is an economically important species causing damage to wooden structures and agricultural crops in Côte d’Ivoire. Toxicities of two new chemical insecticides (Chlorpyrifos-ethyl and fipronil) were evaluated... more
Ancistrotermes cavithorax, is an economically important species causing damage to wooden structures and agricultural crops in Côte d’Ivoire. Toxicities of two new chemical insecticides (Chlorpyrifos-ethyl and fipronil) were evaluated against this termite. The results showed that, Chlorpyrifos-ethyl was the highest toxicity than fipronil. The LT50 value of chlorpyrifos-ethyl at highest concentration (2000 ppm) was shorter (4±1.73 Mins.) than that of fipronil (97.3±1.32 Mins.). Chlorpyrifos-ethyl killed the termite workers faster than fipronil witch concentrations were slower than to kill the termites. The LD50 value of chlorpyrifos-ethyl was shorter (27.119) than that of fipronil (31.035). The study provides an opportunity to compare the toxicities of two new chemical insecticides and to use them effectively in the termite management programs.
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This work assessed some bioindicators of soil quality along toposequences in Gobala (Poro Region of Cote d’Ivoire). Plant communities have been assessed in four steps (i) use plant inventories to document abundance of plants according to... more
This work assessed some bioindicators of soil quality along toposequences in Gobala (Poro Region of Cote d’Ivoire). Plant communities have been assessed in four steps (i) use plant inventories to document abundance of plants according to index by assigning a numeric score from +, 1, 2, 3, 4 and 5 respectively corresponding to an average recovery of 0%, 5%, 17.5%, 37.5% 62.5% and 85% (ii) identification of the plant species of scale (iii) distribution of different groups by significantly stands by multivariate analysis (iv) research indicator species based on behavioral indicators depending and nutrient availability. Lower slopes were characterized by 3 perennial grasses plants (Aframomum alboviolaceum, Andropogon africanus, Hyparrhenia subplumosa) and 5 woody plants (Hymenocardia heudelotii, Pseudocedrela kotschii, Pterocarpus santalinoides, Vernonia ambigua and Xylopia parviflora). Lower slopes had highest S/T and lowest C/N values of selected soil quality indicators. At middle slo...
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A study on geological, pedological and botanical prospection was undertaken. The main focus was to identify the types of relief, soils and flora which characterize a suitable soil landscape for the growth of Imperata cylindrica.... more
A study on geological, pedological and botanical prospection was undertaken. The main focus was to identify the types of relief, soils and flora which characterize a suitable soil landscape for the growth of Imperata cylindrica. Investigations were conducted in two locations in Cote d'Ivoire (Ahoue and Yaokoffikro), in order to observe the soil landscape and the state of the plant stand. Data was collected from at Ahoue (southern Cote d'Ivoire) and Yaokoffikro (Centre Cote d'Ivoire). The results obtained from this first investigation indicate that Imperata cylindrica needs a fallow type environmental ecosystem with sandy soils from sedimentary (Abidjan) and silico-aluminous (Bouake) rocks. Imperata cylindrica preferably developed in middle and foot slope positions. Therefore, there is a need for more investigations focusing on the influence of soil texture and nutrients contents on Imperata cylindrica occurrence in both ecosystems.
Diseases caused by environmental contamination by micro-organisms, including intestinal helminths and protozoa, are prevalent in developing countries. According to some authors, their strong expansion in some zones of these countries is... more
Diseases caused by environmental contamination by micro-organisms, including intestinal helminths and protozoa, are prevalent in developing countries. According to some authors, their strong expansion in some zones of these countries is due primarily to favourable climatic conditions, combined with inadequate hygiene measures and cleaning and the generally low socio-economic level. Progress in disease control has resulted from new studies that improve our understanding of the epidemiology of helminthiases and from the availability of simple tools that are inexpensive and effective against these diseases (chemotherapy with albendazole and mebendazole). On the other hand, surprisingly few such studies have looked at intestinal protozoa, although the WHO reports that approximately 480 million individuals throughout the world are infested by amoebiasis caused by the protozoon Entamoeba histolytica and that 40,000-110,000 people die from it each year. Giardiasis, a cosmopolitan parasitos...
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To highlight the continuous cultivation of soil on biodiversity in savannas of Korhogo in the north of Côte... more
To highlight the continuous cultivation of soil on biodiversity in savannas of Korhogo in the north of Côte d&amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;amp;#39;Ivoire, termites were studied with regard to their use as bio-indicators of habitat change in the tropics. Using a standardized method, termites were sampled in five types of plots (PCR 1, PCR 2, PCR 3, PCR 10 and PCR 30) which age
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The conversion of natural ecosystems to agriculture is recognized as the current major cause of biodiversity loss. Given large expanses of land that is under agriculture worldwide, this study, carried out in 2013, aimed to examine the... more
The conversion of natural ecosystems to agriculture is recognized as the current major cause of biodiversity loss. Given large expanses of land that is under agriculture worldwide, this study, carried out in 2013, aimed to examine the contribution of mango orchards to the restoration of hypogenous termite in northern Côte d'Ivoire. Using the TSBF (Tropical Soil Biology and Fertility) monolith method of soil macrofauna estimation, termites were collected in seven age classes of mango tree orchards (class 1: <5 years; class 2: 5–9 years; class 3: 10–14 years; class 4: 15–19 years; class 5: 20–24 years; class 6: 25–29 years; class 7: 30 years and over) and compared with termites collected from the savannah. A total of 16 species of termite were collected in all the study plots. The species richness, low in young orchards of classes 1 and 2 (05 species), increases to reach its maximum in old orchards of more than 30 years (13 species). These old orchards would be even richer and ...
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Diseases caused by environmental contamination by micro-organisms, including intestinal helminths and protozoa, are prevalent in developing countries. According to some authors, their strong expansion in some zones of these countries is... more
Diseases caused by environmental contamination by micro-organisms, including intestinal helminths and protozoa, are prevalent in developing countries. According to some authors, their strong expansion in some zones of these countries is due primarily to favourable climatic conditions, combined with inadequate hygiene measures and cleaning and the generally low socio-economic level. Progress in disease control has resulted from new studies that improve our understanding of the epidemiology of helminthiases and from the availability of simple tools that are inexpensive and effective against these diseases (chemotherapy with albendazole and mebendazole). On the other hand, surprisingly few such studies have looked at intestinal protozoa, although the WHO reports that approximately 480 million individuals throughout the world are infested by amoebiasis caused by the protozoon Entamoeba histolytica and that 40,000-110,000 people die from it each year. Giardiasis, a cosmopolitan parasitos...
Research Interests: Adolescent, Humans, Child, Female, Animals, and 5 moreMale, Prevalence, Cross Sectional Studies, Entamoeba, and Cote D Ivoire
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Research Interests: Poverty, Tropical Medicine, Housing, Developing Countries, Kenya, and 18 moreAdolescent, Equity, Comorbidity, Tropical medicine (Health Sciences), Rural Health, Humans, Child, Female, Male, Risk factors, Hygiene, Access to Health Care, Public health systems and services research, Risk Factors, Parasitic Diseases, Cote D Ivoire, Socioeconomic Factors, and Health Services Accessibility
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Schistosomiasis poses a considerable public health burden in sub- Saharan Africa and a sound understanding of the spatial distribution facilitates to better target control interventions. The objectives of this study were i) to assess the... more
Schistosomiasis poses a considerable public health burden in sub- Saharan Africa and a sound understanding of the spatial distribution facilitates to better target control interventions. The objectives of this study were i) to assess the prevalence of Schistosoma mansoni among school-aged children in four regions of western Côte d'Ivoire; ii) to determine demographic, climatic and environmental factors that influence the distribution of S. mansoni; and iii) to map and predict the distribution of S. mansoni in non-sampled locations. Parasitological surveys were carried out in 264 schools from June to December 2011. In each school, we aimed to examine 50 children for S. mansoni infection using duplicate Kato-Katz thick smears. Schools were georeferenced using a hand-held global positioning system receiver. Demographic data were obtained from readily available school lists, while climatic and environmental data were extracted from open-access remote sensing databases. Multivariable...
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Schistosomiasis is a parasitic disease that occurs in the tropics and subtropics. The mainstay of control is preventive chemotherapy with praziquantel. In Africa, an estimated 230 million people require preventive chemotherapy. In western... more
Schistosomiasis is a parasitic disease that occurs in the tropics and subtropics. The mainstay of control is preventive chemotherapy with praziquantel. In Africa, an estimated 230 million people require preventive chemotherapy. In western Côte d'Ivoire, infections with Schistosoma mansoni are widespread. To provide an evidence-base for programme decisions about preventive chemotherapy to sustain control of schistosomiasis, a 5-year multi-country study with different treatment arms has been designed by the Schistosomiasis Consortium for Operational Research and Evaluation (SCORE) and is currently being implemented in various African settings, including Côte d'Ivoire. We report the study protocol, including ethics statement and insight from a large-scale eligibility survey carried out in four provinces in western Côte d'Ivoire. The study protocol has been approved by the ethics committees of Basel and Côte d'Ivoire. A total of 12,110 children, aged 13-14 years, from 26...
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Studies on the germination and growth of seedlings of Lippia multiflora were conducted on several types of substrates. They consisted of germination tests and monitoring of seedling growth. The results showed that the best germination... more
Studies on the germination and growth of seedlings of Lippia multiflora were conducted on several types of substrates. They consisted of germination tests and monitoring of seedling growth. The results showed that the best germination rates were recorded with the batch of seeds germinated on substrates made of a mixture of soil and manure (S2 = 82.67% and S3 =