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Melioidosis in a galah (Cacatua roseicapilla)
Australian Veterinary Journal
|April 1, 1980
Abstract:
A second case of a natural infection of melioidosis in a native bird is described. Pseudomonas pseudomallei was isolated in pure culture from the liver, spleen and intestinal contents of a galah (Cacatua roseicapilla). The case was characterised by focal granuloma formation, often associated with necrosis, in the brain, lungs, liver, spleen and kidneys.
Insights
Melioidosis, a bacterial infection, was diagnosed in a native galah bird. This second reported case highlights the susceptibility of Australian avifauna to Pseudomonas pseudomallei.
Area of Science:
- Veterinary Pathology
- Avian Diseases
- Microbiology
Background:
- Melioidosis is a serious infectious disease caused by the bacterium Pseudomonas pseudomallei.
- While endemic in tropical regions, natural infections in native Australian birds are rarely documented.
- Understanding disease reservoirs and transmission is crucial for wildlife health.
Observation:
- A single galah (Cacatua roseicapilla) presented with signs consistent with systemic illness.
- The bacterium Pseudomonas pseudomallei was successfully isolated from multiple organs, including the liver, spleen, and intestinal contents.
- Post-mortem examination revealed significant pathological changes.
Findings:
- The infection was characterized by multifocal granulomatous inflammation.
- Necrosis was frequently observed within granulomas across various organs.
- Affected organs included the brain, lungs, liver, spleen, and kidneys, indicating widespread dissemination.
Implications:
- This case confirms a second instance of natural melioidosis in a native Australian bird species.
- It suggests that native birds may be susceptible to Pseudomonas pseudomallei, potentially serving as hosts or indicators of environmental contamination.
- Further research is needed to assess the prevalence and epidemiological role of melioidosis in Australian bird populations.