Proteolytic bacteria in the lower digestive tract of poultry may affect avian influenza virus pathogenicity.
King MD, Guentzel MN, Arulanandam BP, Lupiani B, Chambers JP. Proteolytic bacteria in the lower digestive tract of poultry may affect avian influenza virus pathogenicity. Poult Sci. 2009 Jul; 88(7):1388-93.