This study describes the first case of canine leproid granuloma in the Amazon region, Brazil. A Boxer dog from the city of Castanhal, Pará presented nodular, alopecic, firm, ulcerated, non-pruritic lesions on both pinnae. The nodules were removed surgically and submitted to histopathological analysis. The microscopic exam revealed marked inflammatory infiltrate composed of macrophages, plasma cells, neutrophils, lymphocytes and giant cells. The Ziehl-Neelsen staining technique showed a large amount of alcohol-acid resistant bacilli inside macrophages and giant cells. The samples exhibited a strong immunohistochemical reaction to Mycobacterium spp.
leproide granuloma; Amazon Region; pathology
