Strengthening the Control of Mosquito Vectors in Cabo Verde

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18.4.4

Discussion

The results showed that BR-OVT adhesive can be a good tool for monitoring the two

species in Praia, Cabo Verde. Although it was developed to capture Cx. quinquefasciatus,

this trap also captures Ae. aegypti at different stages of its cycle, both in Praia and As-

somada. The presence of Cx. pipiens s.l. is associated with infusion activity, with a drop

in the number of rafts collected over the months of observation. In contrast, Ae. aegypti

colonizes BR-OVT as the infusion loses its activity, given the known preference of this

species for breeding sites with a low concentration of organic matter. Another factor that

contributes to the collection of Ae. aegypti is its population size. According to [22], who

carried out an entomological survey of the culicidological fauna of the leeward islands of

Cabo Verde, this is the prevalent species at the expense of others.

18.4.5

Conclusion

Adhesive BR-OVT is a potentially employable trap for monitoring Cx. pipiens s.l. and

Ae. aegypti on the island of Santiago, Cabo Verde, as it is sensitive to the presence of

different stages of the life cycle of both mosquitos.

18.5

PILOT STUDY III

18.5.1

Evaluation of the effectiveness of insecticide paints for use in the control of Ae.

aegypti, vector of dengue and zika in Cabo Verde.

The control strategies for invasive aedine species implemented in recent years have

not been effective due to the tools used and the continuous need for repeated interventions

that can hardly be sustainable. It is necessary to concentrate efforts on the focal control of

the places detected with the greatest presence of the vectors and with residual tools that

carry a constant and lasting pressure on the mosquitos over time [29, 31]. Homes with

poor hygiene and sanitation conditions constitute the ideal habitat for the proliferation of

mosquitos. Additionally, the high density of homes and people in these marginal periph-

eral urban areas enhance the rapid transmission of arboviruses [32, 33]. The mosquitos’

activity peaks in terms of their blood feeding coincide with moments of majority presence

of the residents in their homes (evening), being necessary control activities in the houses

and specifically to protect people from bites. Therefore, the use of insecticidal paints for

the indoor control of arbovirus-transmitting mosquitos is an important strategy to reinforce

vector surveillance and control programs [34, 35].

The aim of this study was to evaluate the susceptibility of Aedes aegypti from Praia,

the country’s capital and main focus of vector-borne diseases (VBD), to insecticide paint

candidates for introduction as a form of household vector control.

18.5.2

Material and method

Biological material: Three-five days old females of Ae. aegypti, unfed, from collected

eggs of different locations of the city of Praia, Cabo Verde. Four collections of Ae. aegypti