Fungal plaque and nodules, aspergillosis, turkey poult

Thoracic and abdominal air sacs of a turkey poult with aspergillosis. Note the single, large, flat, white fungal plaque on the lung (blue arrow) and the multiple, smaller, coalescing, firm, white to tan fungal nodules along the inner thigh (green arrow) and within the air sacs (orange arrow). Note also the mild caseous exudate on serosal surfaces within the coelom, indicative of bacterial serositis. The large white structure on the thigh that appears between the blue and green arrows is the head of the femur.