Fowl adenovirus induced different manifestations of the disease in two consecutive chicken breeding flocks in a poultry hall

This study investigated an adenovirus infection in two consecutive breeding flocks the same poultry hall. Thirty-six thousand one-day-old chickens of ROSS 308 hybrid broiler type were kept together one The first flock during fattening did not show any clinical signs disease or increased mortality. Typical seen second flock. included: depression, apathy, somnolence, a crouched position with droopy head, fuzzy feathers, anaemic combs and wattles, sporadic nervous signs, reduced weight gain. Increased mortality was recorded from 18 to 25 days age, higher rate resulted dehydration exhaustion. surviving showed growth slightly below average by end period. necropsies characteristic lesions for inclusion body hepatitis (IBH). Adenoviral gizzard erosions (AGE) found mainly In both flocks, FAdV-A detected polymerase chain reaction (PCR) liver samples. presence fowl B confirmed evaluated results typical IBH, whereas pathological changes AGE.