Selection and Productivity of Aedes aegypti breeding sites

N BURRONI; MAROLI M; GARCIA MAILEN; IBARRA BOUZADA, LUCIA; GUERENSTEIN PG

Si bien el evento fue en la 2da mitad del 2020, se publico en 2021

Congreso; IV JOINT MEETING OF THE BIOLOGY SOCIETIES OF ARGENTINA; 2021

Aedes aegypti is the main vector of dengue, Zika and chikungunyas, and studying their breeding sites is important for their control. In Diamante (April 2015) 100 houses were studied at random, the containers that could contain water were counted and those with larvae and pupae. A. aegypti abundance was estimated with Index of: Container (CI), containers prevalence; houses (HI), houses prevalence; Breteau (BI), n° of breeding sites/100 houses, and density of Pupae/ha (PD). The availability (ABS) and use (UBS) of the breeding site resource were studied. The containers were categorized according to their function in: related to Construction (C), Domestic (D), Gardening (G), Useless (U), Pet (P), Water reserve (WR), Returnable (RT), and Others (O). For each one, the CI, adult productivity, and Ivlev’s electivity index were calculated (IEV = 0, no choice; IEV = 1, maximum choice). The categories with the highest ABS were P and WR. For the city as a whole, it was observed: HI = 12, CI = 6.06, BI = 18, and PD = 4.03. A total of 187 immature were counted, the most frequent UBS being categories U and G, and in the P, we never found immature. The highest value of the CI was for C and then U. The highest productivity of adults resulted in categories U and G, following in importance C. High IEV was observed in C, and minimal in G, great evasion in P, and slight in D and RT. The main containers (P, RT, WR, D and G) that contributed to the ABS would be related with their functions of contain water per se, at least at some point. The values of the indices and density of pupae/ha (average of 2 female adults/ha) were high. The electivity of C and U and evasion in P would be influenced by the anthropic intervention and not so much a reflection of the mosquito´s choice. However, U and G were the most productive, and this could be a characteristic of a more favorable environment and a consequence of a choice for vector development.