|Description:||Under a magnification of 200x, and stained using the acid-fast and water-acid staining method, this brain tissue specimen revealed the presence of an actinomycotic sulfur granule, in a rare case of disseminated actinomycosis.|
Actinomycosis is usually caused by an anaerobic bacteria called Actinomyces israelii, which is a common, and normally nonpathogenic organism found in the nose and throat.
Because of the bacteria's normal location in the nose and throat, actinomycosis most commonly appears in the face and neck. However, the infection can sometimes occur in the chest (pulmonary actinomycosis), abdomen, pelvis, or other areas of the body including the brain. The infection is not contagious.