Aspergillosis is a respiratory disease in poultry (chickens, turkeys, and less frequently ducklings, pigeons, canaries, geese, and many other wild and pet birds. In chickens and turkeys, the disease may be endemic on some farms; in wild birds, it appears to be sporadic, frequently affecting only an individual bird. In commercial chickens (broiler & layer chicks), severe outbreaks usually occur in birds 3–14 days old.
This disease is caused by Aspergillus fumigatus (commonly). However, several other Aspergillus spp may be incriminated. Mortality rates are seen in chicks and poults that inhale large numbers of spores during hatching in contaminated incubators. In older birds, infection is caused primarily by inhalation of spore-laden dust from contaminated litter or feed or dusty range areas.
Clinical Symptoms and Pathological Lesions:
Hyperpnea, dyspnea, emaciation, inappetence and increased thirst may be seen. Airsacculitis, pulmonary lesions are characterized by white to yellow plaques and nodules a few mm to several cms in diameter; occasionally, mycelial masses may be seen within the air passages on gross examination. The plaques and nodules also may be found in the syrinx, air sacs, and liver.
The picture above is broiler chicks, 4 days old. Clinical signs hyperpnea, gasping, dyspnea and high mortality in the first week. Sick and dead chickens can be found until day 14. If all chickens showing clinical symptoms are removed from the flock then other chickens grow well. There is no horizontal spread of the disease. See the video, clinical symptoms that appear.
video, aspergillosis symptom in layer chicks.
pathological lesions, In the nodular form, multiple grey whitish or yellowish dense nodes in the air sacs & lung are observed
Aspergillosis pathological lesions on air sacs
Aspergillosis symptoms & lesions on air sacs