Abstract
Aspergillosis is known as the most commonly occurring mycotic infection in variety of
avian species causing significant economic losses in terms of poor growth, decrease in
overall production and/or mortality in different species of birds including ostrich
throughout the world due to aspergillosis. This study describes clinical, histopathological
and mycological findings in an adult ostrich. An adult ostrich with history of simultaneous
occurrence of blocked bladder associated with penile protrusion, proventriculus impaction
and testicular ailments died of aspergillosis infection. Different clinical signs such as
anorexia, dyspnea and coughing were observed prior to death. Necropsy findings showed
significant enlargement of urinary bladder impacted with yellow color and amorphous
material. Spherical grayish white raised areas of caseous necrotic foci of variable diameter
were sparsely spread over the air sacs. Proventriculus was full of gravel; iron bars corn cobs
and plastic bottles. Multiple solitary well circumscribed nodules with hard consistency,
hanging with fibrous threads in air sacs were packed with yellow cheesy material. Grossly
the testes were smaller in size and hard in consistency. Histologically, the in testes atrophy
seminerous tubules, increased connective tissue proliferation and chronic inflammatory cell
infiltration was observed. Moreover, the seminerous tubules were lined by one to two layers
of germinal epithelial cells exhibiting degenerative and necrotic changes and reduced
process of spermatogenesis. Some tubules showed obliterated lumen and multinucleated
giant cells with engulfed necrotic cells were also observed. Results on mycological
examination, staining with lactophenol, Giemsa’s and florescent stain revealed presence of
prominent fungal hyphae and sporangium. Histologically, the lungs tissue revealed
multiple areas of caseous necrosis. The current study describes novel finding of blocked
bladder and fungus infection in an ostrich that died of aspergillosis.
Riaz Hussain, Fazal Mahmood, Ghulam Murtaza, Muhammad Ismail Abbas, Jawad Munawar Warraich, Rabia Akram. (2020) Clinical, pathologico-anatomic and mycological studies of aspergillosis in ostrich (Struthio camelus), Asian Journal of Agriculture and Biology, Volume 8, Issue-4.
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