Mycotic nasal granuloma in cattle

Area of Science:

• Veterinary Pathology
• Mycology
• Animal Science

Background:

• Eosinophilic granulomas are inflammatory lesions observed in various animal species.
• Fungal infections are increasingly recognized as causes of inflammatory conditions in livestock.
• Nasal cavity diseases can impact cattle health and productivity.

Purpose of the Study:

• To describe cases of eosinophilic granulomas in beef cattle.
• To identify the fungal agents associated with these nasal lesions.
• To contribute to the understanding of mycotic diseases in cattle.

Main Methods:

• Histopathological examination of nasal tissues from affected cattle.
• Isolation and identification of fungal organisms from submitted samples.
• Review of clinical and pathological data from cases occurring between 1966 and 1975.

Main Results:

• Seven cases of eosinophilic granulomas were diagnosed in the anterior nasal cavity submucosa.
• Fungal elements, including chlamydospores and septate hyphae, were identified within the granulomas.
• Drechslera rostrata was isolated from two cases, and unidentified dematiaceous fungi from two others.

Conclusions:

• Fungal infections, particularly by Drechslera rostrata and other dematiaceous fungi, can cause eosinophilic granulomas in the nasal cavity of beef cattle.
• These findings underscore the importance of considering mycotic agents in the differential diagnosis of nasal inflammatory conditions in cattle.
• This study provides historical data on fungal-induced nasal granulomas in Queensland cattle.