Resting behaviour of Aedes aegypti in Trinidad: with evidence for the re-introduction of indoor residual spraying (IRS) for dengue control

Particle and Fibre Toxicology

Dave D Chadee¹ 

[1] Department of Life Sciences, The University of the West Indies, St. Augustine, Trinidad, West Indies

关键词: Dengue control;    IRS;    Blood feeding;    Quiescence;    Resting sites;    Aedes aegypti;    Trinidad;   

Others  :  824699
DOI  :  10.1186/1756-3305-6-255

 received in 2013-06-26, accepted in 2013-08-29,  发布年份 2013

【 摘 要 】

Background

Historically, Aedes aegypti (L.) mosquitoes were controlled/eradicated by fumigation, residual spraying and the elimination of breeding sites. However, the underlying mechanisms of how these vector populations were managed have never been evaluated. Most studies report that these programs failed due to the emergence of DDT resistance in the 1950s and early 1960s. Therefore, behavioural and physiological factors have never been examined to determine program success or failure.

Methods

A ten- week study collecting resting and flying mosquitoes from every room in houses using small hand nets and Propokock aspirators in St. Augustine, Trinidad, West Indies was conducted during the rainy season months of October to December 2010. During this period a laboratory study was also conducted to determine how soon after egg laying individual females took a blood-meal.

Results

The field study showed the major resting sites of Ae. aegypti were bed rooms (81.9%), living rooms (8.7%) and kitchen (6.9%). The laboratory study showed only 10% of females accepted a blood meal immediately after oviposition but the majority, 70% accepted a blood meal 12 hours post oviposition.

Conclusions

The results provide evidence for the efficacy of indoor residual spraying (IRS) and recommend its re-introduction by targeting the major resting sites of these mosquitoes, especially during dengue fever outbreaks.

【 授权许可】

   
2013 Chadee; licensee BioMed Central Ltd.

【 图 表 】

Figure 1.

Figure 2.

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