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Haematoxylin- and eosin-stained sections of the brain and pancreas of ducks and of the intestine of chickens infected with avian influenza A (H5N1) virus in Netrokona, 2011. (a) Brain – mild perivascular cuffing and increased glial cells. (b) Pancreas – acinar cell necrosis (c) Intestine – increased cellularity of the lamina propria in the villi.
