Mosquito-Producing Containers, Spatial Distribution, and Relationship between Aedes aegypti Population Indices on the Southern Boundary of its Distribution in South America (Salto, Uruguay)

Abstract

Abstract. A study was conducted in the city of Salto, Uruguay, to identify mosquito-producing containers, the spatial distribution of mosquitoes and the relationship between the different population indices of Aedes aegypti. On each of 312 premises visited, water-filled containers and immature Ae. aegypti mosquitoes were identified. The containers were counted and classified into six categories. Pupae per person and Stegomyia indices were calculated. Pupae per person were represented spatially. The number of each type of container and number of mosquitoes in each were analyzed and compared, and their spatial distribution was analyzed. No significant differences in the number of the different types of containers with mosquitoes or in the number of mosquitoes in each were found. The distribution of the containers with mosquito was random and the distribution of mosquitoes by type of container was aggregated or highly aggregated.

Improved dengue fever prevention through innovative intervention methods in the city of Salto, Uruguay

“…Ae. aegypti PPI values by cluster were represented using the Gaussian kernel 21 to represent the pattern of spatial distribution of events on the corresponding coordinates of the same 20 clusters, as in a previous study by Basso et al 1 in the same city of Salto. Care was taken to ensure that the clusters receiving the targeted intervention were at least 200 m (which is beyond the usual flight range of Aedes mosquitoes 22 ) from the nearest control sector to avoid any spill-over effects.…”

“…Uruguay is located at the southern border of the distribution of the dengue vector Aedes (Stegomyia) aegypti (L.) (Diptera, Culicidae), in South America. 1 – 3 In 1997, the presence of this mosquito was detected in the country after a long period of absence, since 1958. 4 The vector of dengue fever then spread to numerous regions of the country, especially to the cities close to the frontiers with Argentina and, to a lesser degree, Brazil 5 – 7 confirming that vector colonization takes place from neighboring countries.…”

“…4 The vector of dengue fever then spread to numerous regions of the country, especially to the cities close to the frontiers with Argentina and, to a lesser degree, Brazil 5 – 7 confirming that vector colonization takes place from neighboring countries. 1 , 8…”

“… 11 Vector control is a complex issue involving constantly changing socio-ecologic systems 12 and requiring transdisciplinary ecosystem approaches that build bridges between scientists, decision-makers and social networks. 1 , 13 , 14 Such approaches are not commonly found in routine disease control programs. 11 …”

Ecological, biological and social dimensions of dengue vector breeding in five urban settings of Latin America: a multi-country study

“…According to World Health Organization (WHO), dengue transmission is currently reported in all Latin American countries, except for Uruguay [2-4]. In 2011, Brazil reported almost 71% (764,032) of all dengue cases for South Cone (807,191), followed by the Andean region (11% of cases, principally reported in Colombia, 33,207 cases, and Ecuador, 7659 cases, and by Mexico (6.3% of 67,918 cases) [5].…”