| risk factors for detection of bronchial casts, most frequently seen in endemic h9n2 avian influenza infection, in poultry flocks in iran. | during the last decade, low pathogenic avian influenza (h9n2 subtype) outbreaks with high mortality have been reported in broiler chicken in various countries especially in some asian and middle east countries including iran. tubular bronchial cast extending to the lower bronchi (bc) is one of the most frequently observed post-mortem lesions in affected broiler chicken during h9n2 low pathogenic avian influenza virus outbreaks. this study was conducted to find out risk factors for high mortality ... | 2010 | 20394998 |