id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-253436-dz84icdc	Wille, Michelle	High Prevalence and Putative Lineage Maintenance of Avian Coronaviruses in Scandinavian Waterfowl	2016-03-03		.txt	text/plain	2019	103	54	In this study we screened 764 samples from 22 avian species of the orders Anseriformes and Charadriiformes in Sweden collected in 2006/2007 for CoV, with an overall CoV prevalence of 18.7%, which is higher than many other wild bird surveys. Coronavirus sequences from Mallards in this study were highly similar to CoV sequences from the sample species and location in 2011, suggesting long-term maintenance in this population. Despite few studies, small samples sizes and differences in prevalence, what is clear, is that in the Northern Hemisphere waterfowl species, especially dabbling and diving ducks are important in the epidemiology of avian CoVs. It is interesting to note that these patterns are very similar to those found in low pathogenic influenza A viruses: high prevalence in waterfowl and gulls in the Northern Hemisphere [30] , and little host species and temporal structuring within waterfowl derived viruses in the conserved polymerase genes (such as PB2, PB1) [31] .	./cache/cord-253436-dz84icdc.txt	./txt/cord-253436-dz84icdc.txt