What is your diagnosis? A shoulder mass in a great horned owl.

Keywords: acid-fast; avian mycobacteriosis; avian tuberculosis; Bubo virginianus; cytology; great horned owl; Mycobacterium avium; PCR Avian tuberculosis is a chronic bacterial disease commonly associated with Mycobacterium avium.[6] Mycobacterium avium subsp avium infection has been reported in free-living raptors[7] and raptors exposed to infected domestic fowl.[8] Between 2007 and 2017, 6 of 4000 birds submitted to CWHC Western-Northern had lesions compatible with avian tuberculosis (unpublished data). Zoonotic infections can occur, particularly in immunocompromised people exposed to birds infected with Mycobacterium avium subsp avium.[9] A timely diagnosis will ensure that adequate precautions are taken when handling infected birds and contaminated material. Acid-fast, avian mycobacteriosis, avian tuberculosis, Bubo virginianus, cytology, great horned owl, Mycobacterium avium, PCR. [Extracted from the article]