摘要：Mass-attack of Simuliidae-Diptera on man and domestic animals should not be considered only as a consequence of quality of running freshwater, but also as an effect of the actual state of the surrounding area. The territory, in fact, impacts the qualitative properties of a water body and can trigger adverse phenomena, especially so when modied by signicant anthropic activities. In different locations the native settings have been replaced by deforestation, intensive farming and zootechnological activities. This paper sets forth the results of some investigations carried out further to a mass attack of Simuliidae-Diptera on man at different sites of the national territory. These results have been re-assessed taking into account the areas of interest and the modications that they have undergone.
关键词：Simuliidae-Diptera, running freshwater quality, landscape, human activities, attack to man.
