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Bitome Essono P.Y.,CNRS Biogeosciences Laboratory | Bitome Essono P.Y.,Institute Of Recherche En Ecologie Tropicale Iret Cenarest | Dechaume-Moncharmont F.-X.,CNRS Biogeosciences Laboratory | Mavoungou J.,Institute Of Recherche En Ecologie Tropicale Iret Cenarest | And 2 more authors.
Parasite | Year: 2015

In order to minimize risks of pathogen transmission with the development of ecotourism in Gabon, a seasonal inventory has been performed in five contrasted biotopes in Ivindo (INP) and Moukalaba-Doudou (MDNP) National Parks. A total of 10,033 hematophagous flies were captured. The Glossinidae, with six different species identified, was the most abundant group and constitutes about 60% of the captured flies compared to the Stomoxys (6 species also identified) and Tabanidae with 28% and 12%, respectively. The Glossinidae showed a higher rate of capture in primary forest and in research camps. In INP, the Stomoxys showed a higher rate of capture in secondary forest and at village borders, whereas in MDNP the Stomoxys were captured more in the savannah area. Thus, each fly group seemed to reach maximum abundance in different habitats. The Glossinidae were more abundant in primary forest and near research camps while Stomoxys were more abundant in secondary forest and savannah. The Tabanidae did not show a clear habitat preference. © P.Y. Bitome Essono et al., published by EDP Sciences, 2015.


Mone H.,CNRS Host-Pathogen-Environment Interactions Laboratory | Holtfreter M.C.,Heinrich Heine University Düsseldorf | Allienne J.-F.,CNRS Host-Pathogen-Environment Interactions Laboratory | Mintsa-Nguema R.,Institute Of Recherche En Ecologie Tropicale Iret Cenarest | And 6 more authors.
Parasitology Research | Year: 2015

This study concerns the first urinary schistosomiasis case observed in Corsica (France, Europe) occurring in a 12-year-old German boy. The aim was to identify the relationship between this Schistosoma haematobium infection and other schistosomes of the Schistosoma group with terminal-spined ova. Morphological and molecular analyses were conducted on the ova. The results showed that the schistosome responsible for the emergence of schistosomiasis in Corsica was due to S. haematobium introgressed by genes from S. bovis. © 2015, Springer-Verlag Berlin Heidelberg.


PubMed | Toulouse University Hospital Center, CNRS Host-Pathogen-Environment Interactions Laboratory, University Abomey Calavi, Heinrich Heine University Düsseldorf and Institute Of Recherche En Ecologie Tropicale Iret Cenarest
Type: Case Reports | Journal: Parasitology research | Year: 2015

This study concerns the first urinary schistosomiasis case observed in Corsica (France, Europe) occurring in a 12-year-old German boy. The aim was to identify the relationship between this Schistosoma haematobium infection and other schistosomes of the Schistosoma group with terminal-spined ova. Morphological and molecular analyses were conducted on the ova. The results showed that the schistosome responsible for the emergence of schistosomiasis in Corsica was due to S. haematobium introgressed by genes from S. bovis.


Konate K.,University of Ouagadougou | Konate K.,Université des Sciences et Techniques de Masuku | Mavoungou J.F.,Institute Of Recherche En Ecologie Tropicale Iret Cenarest | Lepengue A.N.,Université des Sciences et Techniques de Masuku | And 5 more authors.
Annals of Clinical Microbiology and Antimicrobials | Year: 2012

Background: The present study reports the antibacterial capacity of alkaloid compounds in combination with Methicillin and Ampicillin-resistants bacteria isolated from clinical samples. The resistance of different bacteria strains to the current antibacterial agents, their toxicity and the cost of the treatment have led to the development of natural products against the bacteria resistant infections when applied in combination with conventional antimicrobial drugs.Method: The antibacterial assays in this study were performed by using inhibition zone diameters, MIC, MBC methods, the time-kill assay and the Fractional Inhibitory Concentration Index (FICI) determination. On the whole, fifteen Gram-positive bacterial strains (MRSA/ARSA) were used. Negative control was prepared using discs impregnated with 10 % DMSO in water and commercially available Methicillin and Ampicillin from Alkom Laboratories LTD were used as positive reference standards for all bacterial strains.Results: We noticed that the highest activities were founded with the combination of alkaloid compounds and conventional antibiotics against all bacteria strains. Then, results showed that after 7 h exposition there was no viable microorganism in the initial inoculums.Conclusion: The results of this study showed that alkaloid compounds in combination with conventional antibiotics (Methicillin, Ampicillin) exhibited antimicrobial effects against microorganisms tested. These results validate the ethno-botanical use of Cienfuegosia digitata Cav. (Malvaceae) in Burkina Faso. Moreover, this study demonstrates the potential of this herbaceous as a source of antibacterial agent that could be effectively used for future health care purposes. © 2012 Konaté et al.; licensee BioMed Central Ltd.


Akomo-Okoue E.F.,Kyoto University | Akomo-Okoue E.F.,Institute Of Recherche En Ecologie Tropicale Iret Cenarest | Inoue E.,Kyoto University | Atteke C.,Université des Sciences et Techniques de Masuku | And 4 more authors.
Mammal Research | Year: 2015

We investigated the relative abundance of four duiker species and the environmental effect including human impacts on their abundance in the forest of Moukalaba, Gabon. We counted and collected fresh faeces from duikers in thirteen 2-km line transects established in different types of vegetation. Genetic species identification showed that blue duiker (Philantomba monticola), Ogilby’s duiker (Cephalophus ogilbyi, which might include the sister species Peter’s duiker Cephalophus callipygus), bay duiker (Cephalophus dorsalis), and yellow-backed duiker (Cephalophus silvicultor) coexisted. Genetic analyses successfully identified Ogilby’s and bay duiker, which are difficult to discriminate using other methods. The blue, Ogilby’s, and yellow-backed duikers were found in all transects. The dung abundance of bay duiker was quite low compared to other duiker species. This result suggests the importance of accumulating information regarding the abundance of each duiker species for updating their conservation status. The dung count method with genetic species identification may be useful for this purpose. The dung abundance of Ogilby’s duikers and blue duikers was affected by human impacts, while that of yellow-backed duikers was not affected by human impacts. The dung abundance of Ogilby’s duikers was lower in young secondary forests, which are regenerating after significant human disturbance. In contrast, generalized liner mixed model showed that the dung abundance of blue duikers was not affected by vegetation type and was lower in transects nearer to the villages, which might be due to past hunting activity. The difference in human impacts among duiker species should be considered for their conservation management. © 2015, Mammal Research Institute, Polish Academy of Sciences, Białowieża, Poland.


Hongo S.,Kyoto University | Nakashima Y.,Kyoto University | Nakashima Y.,Nihon University | Akomo-Okoue E.F.,Kyoto University | And 3 more authors.
International Journal of Primatology | Year: 2016

The correlates of variation in the number of males in primate groups form a long-standing question in primatology. We investigated female reproductive seasonality and the numbers of males in groups of wild mandrills (Mandrillus sphinx) in a 25-month camera-trap survey with 160 camera locations in Moukalaba-Doudou National Park, Gabon. We used 1760 videos to analyze group composition, including the presence of females with newborn infants and with sexual swellings, the number of males present in groups, and male spatial positioning in groups. Female reproduction was seasonal, with a peak in the number of newborns in the mid-rainy season and a peak in the number of females with sexual swellings in the early dry season. The number of males in the group increased in the dry season, with a much greater increase in the number of mature males (sevenfold) than in submature males (twofold). The peak number of mature males, but not submature males, in the group lagged significantly behind the peak in the number of females with sexual swellings, suggesting that submature males enter groups before mature males and/or that mature males stay in the group longer after the peak of females with sexual swellings. Mature, but not submature, males appeared frequently near females with sexual swellings. In conclusion, we found a clear relationship between the presence of receptive females and the number of males in the group, and evidence that male competitive ability influences male strategies. © 2016 Springer Science+Business Media New York


Akomo-Okoue E.F.,Kyoto University | Akomo-Okoue E.F.,Institute Of Recherche En Ecologie Tropicale Iret Cenarest | Inoue E.,Kyoto University | Adenyo C.,Kyoto University | And 2 more authors.
Conservation Genetics Resources | Year: 2013

We developed nine microsatellite markers for duikers by next-generation sequencing using a muscle tissue sample of blue duiker (Cephalophus monticola). For blue duikers, the number of alleles ranged from 4 to 14 (mean 9.4), and the observed and expected heterozygosities were 0.333-0.833 (mean 0.716) and 0.625-0.878 (mean 0.817), respectively. Cumulative probability of identity was low (1.5 × 10-12), indicating that these markers are enough for individual discrimination. All nine markers were successfully amplified in three other duikers (C. dorsalis, C. ogilbyi and C. sylvicultor), and almost all loci were polymorphic. These markers will be useful for clarifying genetic structure of duikers. © 2013 Springer Science+Business Media Dordrecht.


Konate K.,University of Ouagadougou | Ouedraogo M.,University of Ouagadougou | Mavoungou J.F.,Institute Of Recherche En Ecologie Tropicale Iret Cenarest | Lepengue A.N.,Université des Sciences et Techniques de Masuku | And 3 more authors.
International Journal of Phytomedicine | Year: 2012

The present study was conducted to evaluate the pharmacological and toxic effects of aqueous acetone extract of Sida alba L. a Malvaceae species, in mice Swiss and albinos Wistar rats. In acute toxicity test, mice received doses of this extract by intraperitoneal route with LD50 value of 3200 mg/kg. In sub-acute toxicity test, albinos Wistar rats were treat by gavage during 28 days with different doses of aqueous acetone extracts of Sida alba L., (75, 100 and 150 mg/kg). About to the pharmacological properties, the results varied widely in dose of extract and weight of rats and did not show clinical correlations. We undertook this study of extracts in order to provide a scientific basis for the traditional use of Sida alba L., in traditional medicine particularly to treat hepatitis B. Our results of this study appeared to show the safety of acute and sub-acute toxicities of extract from Sida alba L., which can therefore be continuously used with safety in traditional medicine. Statistical studies revealed that there is a low significant difference in body and organ weights, and biological parameters between control group and the treated assay groups (p<0.01 or p<0.05).


Konate K.,University of Ouagadougou | Hilou A.,University of Ouagadougou | Mavoungou J.F.,Institute Of Recherche En Ecologie Tropicale Iret Cenarest | Lepengue A.N.,Université des Sciences et Techniques de Masuku | And 5 more authors.
Annals of Clinical Microbiology and Antimicrobials | Year: 2012

Background: The increased resistance of microorganisms to the currently used antimicrobials has lead to the evaluation of other agents that might have antimicrobial activity. Medicinal plants are sources of phytochemicals which are able to initiate different biological activities including antimicrobials. Materials and methods: In vitro antibacterial (MIC, MBC and time-kill studies) of polyphenol-rich fractions from Sida alba L. (Malvaceae) was assessed using ten bacteria strains (Gram-negative and Gram-positive).Results: All test bacteria were susceptible to the polyphenol-rich fractions. Time-kill results showed that after 5 h exposition there was no viable microorganism in the initial inoculum and the effect of polyphenol-rich fractions was faster on Enterococcus faecalis (Gram-positive bacterium) comparatively to the other bacteria strains.Conclusion: The data analysis indicates that the tested of polyphenol-rich fractions has significant effects when compared with the standard antibiotic. These results therefore justify the traditional use of sida alba L., alone or in combination with other herbs to treat bacterial infections. © 2012 Konaté et al; licensee BioMed Central Ltd.


Konate K.,University of Ouagadougou | Ouedraogo M.,University of Ouagadougou | Ouattara M.B.,University of Ouagadougou | Dibala I.C.,University of Ouagadougou | And 5 more authors.
Research Journal of Applied Sciences, Engineering and Technology | Year: 2012

The present study was conducted to evaluate the hepatoprotective effects of aqueous acetone extract of Cienfuegosia digitata Cav. (Malvaceae) an herbal plant used in Burkina Faso to treat traditionally liver disease in albinos Wistar rats. Animals received by gavage 25, 50 and 100 mg/kg body weight of extract daily for a period of 28 days. Control groups received alcohol 35% and water. In vivo administration of 35% ethanol for a period of 28 days in rats showed an activity of liver marker enzymes (AST, ALT, ALP and GGT), triglycerides, total cholesterol, total bilirubin and direct bilirubin in serum compared with rats which received water (control water). However, administration of 35% ethanol along with aqueous acetone extract decreased the activities of liver markers enzyme in serum comparatively to the control water group (p<0.05 or p<0.01). We noticed that extract at a dose of 100 mg/kg body weight was highly effective than 25 and 50 mg/kg body weight compared to the control water group (ALT and ALP; p>0.05 and p<0.05). This study revealed that Cienfuegosia digitata presents a hepatoprotective potential and this plant could be traditionally exploited in the treatment of liver disease particularly hepatitis B in Burkina Faso. © Maxwell Scientific Organization, 2011.

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