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==Description==

==Description==

pergillosis is a disease of the respiratory system caused by several ''[[Aspergillus spp.]]''. ''Aspergillus fumigatus'' is the most frequently reported species in domestic animals but ''[[Aspergillues tereus]]'' has also been implicated. Aspergillus is a ubiquitous saprophyte and is found worldwide. Commonly affected species include birds, dogs, cats, horses and cattle but the disease has been reported in many other wild and domestic species.

Apergillosis is a disease of the respiratory system caused by several ''[[Aspergillus spp.]]''. ''Aspergillus fumigatus'' is the most frequently reported species in domestic animals but ''[[Aspergillus tereus]]'' has also been implicated. The pathogen is a ubiquitous saprophyte and is found worldwide. Commonly affected species include birds, dogs, cats, horses and cattle but the disease has been reported in many other wild and domestic species.

==Clinical signs and features==

==Clinical signs and features==

===Birds===

===Birds===

In avian species the disease manifests as a diffuse infection of the [[Avian Respiration - Anatomy & Physiology#Air Sacs|air sacs]]. Two forms of the disease have been reported; a diffuse pneumonic form and a nodular form involving the [[Avian Respiration - Anatomy & Physiology#Avian Lungs|lungs]]. Clinical signs include diarrhoes, listlessness, pyrexia, loss of appetite and loss of condition. Seizures may occasionally occur.

In avian species the disease manifests as a diffuse infection of the air sacs. Two forms of the disease have been reported; a diffuse pneumonic form and a nodular form involving the lungs. Clinical signs include dyspnoea, diarrhoes, listlessness, pyrexia, loss of appetite and loss of condition. Seizures and torticollis may occasionally occur if infection disseminates to the brain.

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===Cattle===

===Cattle===

Infection in cattle may cause abortion and ocular infections. Infections involved the uterus, foetal membranes and foetal skin.  

Aspergillosis has a number of clinical manifestations in the cow. Mastitis, abortion, pneumonia  Infection in cattle may cause abortion and ocular infections. Infections involved the uterus, foetal membranes and foetal skin.  

Lesions are usually up to 2mm in diameter and contain asteroid bodies with a germinated spore in the centre. Acute infection causes miliary lesions and chronic infections causes granulomatous and calcified lesions.

Lesions are usually up to 2mm in diameter and contain asteroid bodies with a germinated spore in the centre. Acute infection causes miliary lesions and chronic infections causes granulomatous and calcified lesions.