Impact du virus du Nil occidental sur les caractéristiques de la population de corneilles au Québec

摘要: West Nile Virus (WNV) infection is a zoonotic disease that appeared in North America August 1999. Since then, it has spread throughout the continent. transmitted by mosquito, and birds play role of reservoir. The American crow (Corvus brachyrhynchos) large, easily recognized common bird, very sensitive to WNV. It was designated as sentinel for WNV virus circulation Public Health authorities. However, many elements are still missing comprehension population dynamics, which makes interpreting effects on this rather difficult. principal objective PhD thesis improve our knowledge biology dynamics , Quebec analyzing two kinds data. first type data corresponds 2005 surveillance mortality. second live observations collected southem from 1990 2005. With data, we analyzed morphological characteristics populations explored risk factors associated with baseline specific Regarding described natural spectral analysis. By comparing expected values normal observed during active years Quebec, were able evaluate impact populations. We morphologically different depending age sex group. Age period year significant mortality variations positive variations. Territory (urban or non urban) seem major dynamics. more important 2003 than 2004 This work contributes programmeme also gives us an original