Description: | Caption: Magnified 950X, and processed using the Gömöri-methenamine silver stain, this photomicrograph of a human lung tissue specimen reveals the presence of scattered filamentous organisms throughout the tissue in a case of actinomycosis. Additional Information: Caused by bacteria of the order, Actinomycetales, which includes A. odontolyticus, the disease actinomycosis, or mycetoma, is a slowly progressive, destructive infection of the cutaneous and subcutaneous tissues, fascia, and can progress to a point where it can affect bone and other organs such as the liver. |