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| Leboulanger, C; Bouvy, M; Pagano, M; Dufour, Robert; Got, P; Cecchi, P. |
| This study focused on the effects of two pesticides, paraquat (herbicide) and deltamethrin (insecticide), which are two common molecules used intensively in Burkina Faso. Natural bacterial populations, phytoplankton cultures (one cyanobacterium, Cylindrospermopsis raciborskii, and one chlorophycea, Monoraphidium sp.), and two species of zooplankton (Diaphanosoma excisum and Moina micrura) were isolated from aquatic communities and were used as biological targets in the experimental protocols. Paraquat was moderately toxic to bacteria and phytoplankton, whereas deltamethrin was significantly toxic only to the zooplankton species. Paradoxically, the chlorophycea Monoraphidium sp. exhibited a significant increase of in vitro fluorescence after 48 h at the... |
| Tipo: Text |
Palavras-chave: West Africa; Reservoirs; Planktonic organisms; Deltamethrin; Paraquat. |
| Ano: 2009 |
URL: http://archimer.ifremer.fr/doc/2009/publication-5287.pdf |
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| Baleux, B; Caro, A; Lesne, J; Got, P; Binard, S; Delpeuch, B. |
| The release of enteric pathogenic bacteria in aquatic environments poses the problem of the fate of these bacteria under the effects of environmental factors (solar radiation, salt concentration, temperature, nutrient level, pH, competition). Frequently, these bacterial cells, potentially pathogenic, enter into a non-culturable state on routine bacteriological plating media. However, the use of direct detection methods (DAPI stained cells) allows the visualization of these Viable but Non Culturable cells (VNC). But, beyond the characterization of the viability of the cells (electron transport activity, metabolic activity, membrane integrity, structure and/or quantity of DNA), what happens with the virulence of these cells? This problem was experimentally... |
| Tipo: Text |
Palavras-chave: Salmonella; Survie; Virulence; VNC; Stress; Salmonella; Survival; Virulence; VNC; Stress. |
| Ano: 1998 |
URL: http://archimer.ifremer.fr/doc/00325/43645/43245.pdf |
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