Lénaïck Ollivier

Learn More
BACKGROUND The effectiveness of malaria chemoprophylaxis is limited by the lack of compliance whose determinants are not well known. METHODS The compliance with malaria chemoprophylaxis has been estimated and analysed by validated questionnaires administered before and after the short-term missions (about four months) in five tropical African countries of(More)
Incidence of malaria is increasing in travelers and soldiers. In 2006, a survey was performed in a French battalion returning from a malaria-endemic area. According to the chemoprophylaxis plasma concentration and the individuals' reports, the noncompliance rates were high, respectively, 63.4 and 54.7%.
The term "meningitis belt" was coined by Lapeyssonnie in 1963 to describe a zone in Africa where epidemic meningitis occurs sporadically during the dry season. The purpose of this study was to evaluate the relationship between the recorded rainfall and reported incidence of meningococcal meningitis in Niger from 1996 to 2002. A total of 58 277 cases of(More)
This study reports the first isolation and partial genetic characterization of Chikungunya virus (CHIKV) from patients during a 2006-2007 dengue-like syndrome outbreak in Gabon. The isolated viruses were phylogenetically close to strains isolated in the Democratic Republic of the Congo 7 years ago and to strains isolated more recently in Cameroon. These(More)
Despite an increase in foreign tourism and in the numbers of foreign military personnel deployed to Djibouti, little is known about the risk of gastrointestinal illness in this country in eastern Africa. To assess risk and to describe common features of gastrointestinal illnesses, reports of illness derived from military health surveillance data collected(More)
We obtained health surveillance epidemiologic data on malaria among French military personnel deployed to French Guiana during 1998-2008. Incidence of Plasmodium vivax malaria increased and that of P. falciparum remained stable. This new epidemiologic situation has led to modification of malaria treatment for deployed military personnel.
Formerly known as a hypoendemic malaria country, the Republic of Djibouti declared the goal of pre-eliminating malaria in 2006. The aim of the present study was to evaluate the prevalence of Plasmodium falciparum, Plasmodium vivax and mixed infections in the Djiboutian population by using serological tools and to identify potential determinants of the(More)
BACKGROUND Malaria chemoprophylaxis compliance is suboptimal among French soldiers despite the availability of free malaria chemoprophylaxis and repeated health education before, during and after deployment to malaria endemic areas. METHODS In 2007, a randomized controlled study was performed among a cohort of French soldiers returning from Côte d'Ivoire(More)
French troops were sent to the Ivory Coast on September 22, 2002 within the framework of Operation Unicorn in response to the political unrest. From September 22 to October 20, a total of 37 cases of malaria were reported, i.e., 35.7 cases per 1000 man-months. As of October 11, the central headquarters of the Armed Services Health Corps decided to use(More)