| malaria transmission in the lagoon area of cotonou, benin. | a study of the prevalence and intensity of malaria transmission in the lagunar area of benin was carried out by means of repeated cross-sectional surveys of the child population. six areas were selected: two urban areas of cotonou, three lagunar villages and one savanna village. slide positive rates and prevalence of antibodies to p. falciparum sporozoites were examined in june-july 1989 (long rainy season), october-november 1989 (short rainy season) and march-april 1990 (short dry season). para ... | 1992 | 1339969 |
| [development of chemoresistance of plasmodium falciparum to chloroquine and mefloquine in benin between 1980 and 1989]. | resistance of p. falciparum to chloroquine has been notified in 1986 in non-immune visitors. authors organized surveys of in vivo and in vitro tests to follow evolution of the phenomena. the increase in number of p. falciparum strains resistant to chloroquine was sudden in 1986 but stopped to rise from this date, and even seemed to decrease gently. the geographical distribution of the resistance, restricted to the region of cotonou, could be explained by illegitimate chloroquine distribution. bu ... | 1990 | 2208463 |
| development of vegetable farming: a cause of the emergence of insecticide resistance in populations of anopheles gambiae in urban areas of benin. | a fast development of urban agriculture has recently taken place in many areas in the republic of benin. this study aims to assess the rapid expansion of urban agriculture especially, its contribution to the emergence of insecticide resistance in populations of anopheles gambiae. | 2009 | 19442297 |
| [coastal urban malaria in cotonou (republic of benin). entomological study]. | a one year entomological was carried out the survey in the coastal town of cotonou to study the urban transmission of malaria. three representative areas of cotonou were chosen. the method adopted concerned night catches on human bait and dissection of a. gambiae s.l. the density of the vector (a. gambiae s.l.) fluctuated with the level of urbanization of the areas the annual aggressivity rates reached 1179 in the town center, 3666 in an the outskirts and 3363 in intermediate areas. mean sporozo ... | 1992 | 1462029 |
| presence of insensitive acetylcholinesterase in wild populations of culex pipiens quinquefasciatus from benin. | resistance to organophosphates and carbamates was investigated in three samples of culex pipiens quinquefasciatus say, from cotonou and parakou in the republic of benin. each population of larvae was selected with propoxur to eliminate susceptible individuals and more easily analyse resistant mosquitoes if the resistance allele is present in the field sample. the mass-selection showed that there are resistant mosquitoes in natural populations of c. p. quinquefasciatus in benin and that nowadays ... | 2008 | 18616921 |
| [lagoonal and coastal malaria at cotonou: entomological findings]. | nowadays, malaria control is planned according to the epidemiological context. various aspects of malaria have been described in sub-saharan africa. we report here entomological data from the coastal area of benin, west africa, which has many lakes and lagoons. we carried out a longitudinal study in which we investigated the dynamics of populations of malaria vectors in various zones, the frequency of inoculation in these zones, the infestation rate of the anopheles gambiae mosquitoes collected, ... | 2000 | 11111245 |
| [resistance of malaria vectors to pyrethrins used for impregnating mosquito nets in benin, west africa]. | impregnated bednets can be considered a major tool for reducing anopheles bites, malaria morbidity and overall mortality. the resistance of anopheles gambiae to pyrethroids used to impregnate bednets and curtains has already been noted in the urban area of cotonou in benin (18, 21). in this study, we wished to find out if the resistance observed in cotonou is localized only in this town or is already extensive throughout benin. in this case, such resistance would be a handicap to the promotion o ... | 1999 | 10399604 |
| [entomological study on the malaria transmission in coastal and lagoon areas: the case of a village built on a brackish lake]. | in a longitudinal study we have observed the fluctuation in density of two anopheles populations responsible for malaria transmission in a village built on a brackish lake. the two a. gambiae complex species are a. melas and a. gambiae s.s. the former is the most abundant (88%). the brackish lake ecosystem gives to both species possibilities of adaptation. the salt water species of the a. gambiae complex, a. melas, was found to be tolerant to waters with very low salinity. on the other hand, a. ... | 1995 | 8849299 |