The spatial distribution of Aedes aegypti and Aedes albopictus in a transition zone, Rio de Janeiro, Brazil

Abstract

Dengue fever has become the most important vector-borne viral disease in Brazil. Human facilitated transport of desiccation-resistant eggs has led to its two most important vectors, Aedes aegypti and Ae. albopictus, becoming widespread. In this paper, we report seasonal and spatial variation in larval abundances of Ae. aegypti and Ae. albopictus across a small-scale transition zone between an urban area and an urban wooded/forested area within Rio de Janeiro, Brazil. We installed 400 ovitraps across 10 sites with different human population densities and vegetation coverage. Eggs and larvae were collected for three weeks during the wet and dry seasons of 2002 and 2003. Ae. albopictus was predominantly found in the forested areas of the study site whereas in the urbanized area Ae. aegypti was more abundant. Both species peaked during the wet season. This distribution pattern, which may reflect adult flight range, may favor the co-occurrence of larvae of these species in a small-scale urban/urban forest transition zone.

Dengue and HEV co-infection in a case of hepatitis

“…3 In the Liver function tests (LFT) most common abnormality seen is elevated transaminases which are involved in amino acid metabolism. In approximately 90% of the patients with DF, aspartate aminotransferase (AST) is higher than the alanine aminotransferase (ALT).…”

Hot spot detection and spatio-temporal dynamics of dengue in Queensland, Australia

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Detección de Aedes albopictus (Skuse) (Diptera: Culicidae) en el municipio de Istmina, Chocó, Colombia

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