Entomological impact of indoor residual spraying with pirimiphos-methyl: a pilot study in an area of low malaria transmission in Senegal

被引：18

作者：

Sy, Ousmane ^{[1
]}

Niang, El Hadji Amadou ^{[1
]}

Ndiaye, Magatte ^{[2
]}

Konate, Lassana ^{[1
]}

Diallo, Abdoulaye ^{[2
]}

Ba, Elhadji Conco Cire ^{[3
]}

Tairou, Fassiath ^{[2
]}

Diouf, Elhadji ^{[1
]}

Cisse, Badara ^{[2
,4
]}

Gaye, Oumar ^{[2
]}

Faye, Ousmane ^{[1
]}

机构：

[1] Univ Cheikh Anta Diop, Fac Sci & Tech, Lab Ecol Vectorielle & Parasitaire, Dakar, Senegal

[2] Univ Cheikh Anta Diop, Fac Med Pharm & Odontostomatol, Lab Parasitol Med, Dakar, Senegal

[3] IRD, Dakar, Senegal

[4] London Sch Hyg & Trop Med, London, England

来源：

MALARIA JOURNAL | 2018年 / 17卷

关键词：

Hotspot; IRS; Pirimiphos-methyl; Malaria; Elimination; Senegal; ANOPHELES-GAMBIAE COMPLEX; INVERSION POLYMORPHISM; WEST-AFRICA; ARABIENSIS; CULICIDAE; DIPTERA; MOSQUITOS; BEHAVIOR; ELISA;

D O I：

10.1186/s12936-018-2212-x

中图分类号：

R51 [传染病];

学科分类号：

100401 ;

摘要：

Background: Scaling-up of effective anti-malarial control strategies in Central-West region of Senegal has resulted in the sharp decline in malaria prevalence in this area. However, despite these strategies, residual malaria transmission has been observed in some villages (hot spots). The objective of this study was to assess the impact of indoor residual spraying (IRS) with pirimiphos-methyl on malaria transmission in hot spot areas. Methods: The malaria vector population dynamics were monitored in each of the six selected villages (4 of which used IRS, 2 were unsprayed control areas) using overnight human landing catches (HLC) and pyrethrum spray catches (PSC). The host source of blood meals from freshly fed females collected using PSC was identified using the direct ELISA method. Females caught through HLC were tested by ELISA for the detection of Plasmodium falciparum circumsporozoite protein and Anopheles gambiae complex was identified using PCR. Results: Preliminary data shown that the densities of Anopheles populations were significantly lower in the sprayed areas (179/702) compared to the control. Overall, malaria transmission risk was 14 times lower in the intervention zone (0.94) compared to the control zone (12.7). In the control areas, three Anopheles species belonging to the Gambiae complex (Anopheles arabiensis, Anopheles coluzzii and Anopheles melas) maintained the transmission, while only An. coluzzii was infective in the sprayed areas. Conclusion: The preliminary data from this pilot study showed that IRS with the CS formulation of pirimiphos-methyl is likely very effective in reducing malaria transmission risk. However, additional studies including further longitudinal entomological surveys as well as ecological and ethological and genetical characterization of vectors species and their populations are needed to better characterize the entomological impact of indoor residual spraying with pirimiphos-methyl in the residual transmission areas of Senegal.

引用

页数：11

共 32 条

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