Sougoufara Seynabou, Thiaw O., Cailleau A., Diagne Nafissatou, Harry M., Bouganali Charles, Sembene Mbacké, Doucouré Souleymane, Sokhna Cheikh. (2018). The impact of periodic distribution campaigns of long-lasting insecticidal-treated bed nets on malaria vector dynamics and human exposure in Dielmo, Senegal. American Journal of Tropical Medicine and Hygiene, 98 (5), p. 1343-1352. ISSN 0002-9637.
Titre du document
The impact of periodic distribution campaigns of long-lasting insecticidal-treated bed nets on malaria vector dynamics and human exposure in Dielmo, Senegal
Année de publication
2018
Auteurs
Sougoufara Seynabou, Thiaw O., Cailleau A., Diagne Nafissatou, Harry M., Bouganali Charles, Sembene Mbacké, Doucouré Souleymane, Sokhna Cheikh
Source
American Journal of Tropical Medicine and Hygiene, 2018,
98 (5), p. 1343-1352 ISSN 0002-9637
The implementation of long-lasting insecticidal-treated bed nets (LLINs) has contributed to halving the mortality rate due to malaria since 2000 in sub-Saharan Africa. These tools are highly effective against indoor-feeding malaria vectors. Thus, to achieve the World Health Assembly's new target to reduce the burden of malaria over the next 15 years by 90%, it is necessary to understand how the spatiotemporal dynamics of malaria vectors and human exposure to bites is modified in the context of scaling up global efforts to control malaria transmission. This study was conducted in Dielmo, a Senegalese village, after the introduction of LLINs and two rounds of LLINs renewals. Data analysis showed that implementation of LLINscorrelatedwith a significant decrease in the biting densities of themainmalaria vectors, Anopheles gambiae s. l. and Anopheles funestus, reducing malaria transmission. Other environment factors likely contributed to the decrease in An. funestus, but this trend was enhanced with the introduction of LLINs. The bulk of bites occurred during sleeping hours, but the residual vector populations of An. gambiae s. l. and An. funestus had an increased propensity to bite outdoors, so a risk of infectious bites remained for LLINs users. These results highlight the need to increase the level and correct use of LLINs and to combine this intervention with complementary control measures against residual exposure, such as spatial repellents and larval source management, to achieve the goal of eliminating malaria transmission.
Plan de classement
Entomologie médicale / Parasitologie / Virologie [052]
Description Géographique
SENEGAL
Localisation
Fonds IRD [F B010073037]
Identifiant IRD
fdi:010073037
