Biogeographical aspects of the occurrence of Nyssomyia neivai and Nyssomyia intermedia (Diptera: Psychodidae) in a sympatric area of the Brazilian savannah

Effect of Environmental Disturbance on the Population of Sandflies andLeishmaniaTransmission in an Endemic Area of Venezuela

“…These results are supported by those of previous studies [3, 21, 32]. Most diversity and species richness in the forest, conserved area, could be caused by higher accumulation organic material to accumulate as a result of the decomposition of leaves and vegetation waste lying on the soil favoring larval development.…”

“…The sympatric relationship between L. ovallesi and L. gomezi is comparable to what was reported in Brazil between L. intermedia and L. neivai [21], where L. ovallesi is the species with a greater dependence on conserved areas than L. gomezi , predominated near the peridomiciles, indicating a process of adaptation, mainly to this environment of less dense vegetation. L. gomezi and L. ovallesi as predominant species of primary forest, as the deforestation extended, there was a tendency for L. ovallesi to disappear, suggesting that this species is more dependent on the primary forest than L. gomezi .…”

“…Tropical areas are characterized by a great diversity and wide distribution of sandflies fauna [19, 20]. In Brazil, it has been reported that the devastation of natural areas, which includes natural habitats for sandflies, increases the adaptability of these species to environments with human intervention, as observed by the increasing number of cases of leishmaniasis in urban environments [21]. …”

“…The results of this study highlight differences in the sandflies population composition and structure across 3 agroecosystems, characterized by the different degrees of ecological disturbance that were surveyed. Few studies on sandflies have focused on this aspect, as most reports have been limited to epidemiological studies and the documentation of naturally infected species [21]. In addition, other studies have focused on how the population composition changes in different areas, such as the home and peridomestic or wild environments [22–24], or according to the type of capture method used [25].…”

Incipient colonisation of Lutzomyia longipalpis in the city of Resistencia, province of Chaco, Argentina (2010-2012)

“…The persistence of the VL vector in Barrio de los Pescadores can be explained by a continuous colonisation from the city of Corrientes (the source population) across the Paraná River or to habitat conditions or climate buffering due to the same river. Further studies will be required to assess the quality of the Paraná River as a physical barrier for sandfly dispersion, as large rivers in Brazil have shown to be (Coutinho-Abreu et al 2008, Saraiva et al 2012). Therefore, surveillance of human and canine VL should be prioritised in Barrio de los Pescadores because of the presence of the vector and the continuous flow of dogs between Corrientes and Chaco.…”