The Sticky Resting Box, a new tool for studying resting behaviour of Afrotropical malaria vectors

Particle and Fibre Toxicology

Alessandra della Torre²  N’Fale Sagnon⁴  Heather M Ferguson³  Hilary Ranson¹  Antoine Sanou⁴  Alphonse Traoré⁴  Maria Calzetta²  Katharina Kreppel³  Wamdaogo M Guelbeogo⁴  Marco Pombi² 

[1] Vector Group, Liverpool School of Tropical Medicine, Liverpool, UK;Institut Pasteur Fondazione Cenci Bolognetti, Rome, Italy;Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, UK;Centre National de Recherche et Formation sur le Paludisme, Ouagadougou, Burkina Faso

关键词: Ecology;    Sticky trap;    Mosquito sampling;    Resting behaviour;    Malaria;    Anopheles gambiae;   

Others  :  806098
DOI  :  10.1186/1756-3305-7-247

 received in 2014-01-31, accepted in 2014-05-23,  发布年份 2014

【 摘 要 】

Background

Monitoring densities of adult mosquito populations is a major challenge in efforts to evaluate the epidemiology of mosquito-borne diseases, and their response to vector control interventions. In the case of malaria, collection of outdoor-resting Anophelines is rarely incorporated into surveillance and control, partially due to the lack of standardized collection tools. Such an approach, however, is increasingly important to investigate possible changes in mosquito behaviour in response to the scale up of Insecticide Treated Nets and Indoor Residual Spraying. In this study we evaluated the Sticky Resting Box (SRB) - i.e. a sticky variant of previously investigated mosquito Resting Box, which allows passive collection of mosquitoes entering the box – and compared its performance against traditional methods for indoor and outdoor resting mosquito sampling.

Methods

Daily collections were carried out in two neighbouring villages of Burkina Faso during rainy season 2011 and dry season 2012 by SRB located indoors and outdoors, and by Back-Pack aspiration inside houses (BP) and in ad hoc built outdoor pit-shelters (PIT).

Results

Overall, almost 20,000 Culicidae specimens belonging to 16 species were collected and morphologically identified. Malaria vectors included Anopheles coluzzii (53%), An. arabiensis (12%), An. gambiae s.s. (2.0%) and An. funestus (4.5%). The diversity of species collected in the two villages was similar for SRB and PIT collections outdoors, and significantly higher for SRB than for BP indoors. The population dynamics of An. gambiae s.l. mosquitoes, as obtained by SRB-collections was significantly correlated with those obtained by the traditional methods. The predicted mean estimates of An. gambiae s.l. specimens/sampling-unit/night-of-collections was 6- and 5-times lower for SRB than for BP indoors and PIT outdoors, respectively.

Conclusions

Overall, the daily performance of SRB in terms of number of malaria vectors/trap was lower than that of traditionally used approaches for in- and outdoor collections. However, unlike these methods, SRB could be set up to collect mosquitoes passively over at least a week. This makes SRB a promising tool for passively monitoring anopheline resting populations, with data presented here providing guidance for how to set up SRB-based collections to acquire information comparable to those obtained with other methods.

【 授权许可】

   
2014 Pombi et al.; licensee BioMed Central Ltd.

【 图 表 】

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