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Aspergillosis symptoms

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.

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aspergillosis symptoms in broiler chicks

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.

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aspergillosis symptoms in layer chicks

video, aspergillosis symptom in layer chicks.

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Aspergillosis symptoms in Male Chicks, see video.

pathological lesions, In the nodular form, multiple grey whitish or yellowish dense nodes in the air sacs & lung are observed

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Aspergillosis pathological lesions on air sacs

See also : Pictures of Avian Influenza H5N1 Symptoms in Chickens

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aspergillosis pathological lesions on internal organs

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Aspergillosis symptoms & lesions on air sacs

Treatment and Control: There is no effective treatment. The disease is very acute in chicks. If the infection has occurred in the hatchery. The disease can become severe only in a short time. There is no effective therapy to overcome this disease in the first week after hatching. Prevention:  Strict adherence to sanitation procedures in the hatchery minimizes early outbreaks. Grossly contaminated or cracked eggs should not be set for incubation because they enable bacterial and fungal growth and may explode and disseminate spores throughout the hatching machine. Contaminated hatchers should be thoroughly cleaned and fumigated with enilconazole or formaldehyde. Avoiding moldy litter or ranges serves to prevent outbreaks in older birds. Cleaned pens should be sprayed or fumigated with enilconazole following label directions, and all equipment should be cleaned and disinfected.
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