Resumen

POPA ROSALES, Julio César et al. Metamorphosis and emergence of Aedes aegypti mosquitoes outside the aquatic environment and a new report of entomologic and epidemiologic significance in Santiago de Cuba. Rev Cubana Hig Epidemiol [online]. 2011, vol.49, n.2, pp.173-182. ISSN 1561-3003.

INTRODUCTION: A measure to reduce the appearance of epidemic outbreaks of dengue and to improve effectiveness depending on the cost of campaigns against the Aedes aegypti is to identify the local environmental factors leading to reinfestation. OBJECTIVES: To determine the level of emergence of Aedes aegypti adult mosquitoes from the pupa placed outside the aquatic environment, as well as to specify exactly the effectiveness of the sunbeams as a physical method for elimination of foci. METHODS: A randomized field controlled experimental trial was carried out in two branches. The experimental group corresponded to extracted pupas of aquatic environment placed in land. Pupas remained in the water were the control group and all of them were selected according its ages in hours. On the other hand, the effect of sunbeams as physical method was assayed for elimination of pupas extracted from water. RESULTS: The metamorphosis of pupas surviving outside water was finished between 48 and 72 hours, similar to behavior in the aquatic environment. The emergence level of adult mosquitoes in the experimental group was of 34.3 %. The reduction of relative risk showed that pupa's extraction from the water towards land, to reduce the risk to generate new mosquitoes in only the 65% and remains the 35 % of probability of to generate new foci. The relative risk in the group exposed to sun radiations in relation to those non-exposed was of zero. CONCLUSIONS: The pups of Aedes aegypti extracted of its aquatic environment may to live for some hours in land, to complete its metamorphosis and to emerge until adult mosquitoes. Also, it was evidenced that sunbeams as a physical method to reduce to zero the emergence level of vector.

Palabras clave : Aedes aegypti; control; evolutionary cycle.

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