Painful oral, lung, or GI tract abscesses. See Actinomyces spp, Streptothrix, and Mycetoma.MouthEncyclopedia Entry for Actinomycosis :Actinomycosis. Actinomycosis is usually caused by bacteria called Actinomyces israelii. This is a common organism found in the nose and throat. It normally does not cause disease. Because of the bacteria's normal location in the nose and throat, actinomycosis most commonly affects the face and neck. The infection can sometimes occur in the chest ( pulmonary actinomycosis ), abdomen, pelvis, or other areas of the body. The infection is not contagious. This means it does not spread to other people. Symptoms occur when the bacteria enter the tissues of the face after trauma, surgery, or infection. Common triggers include dental abscess or oral surgery. The infection can also affect certain women who have had an intrauterine device (IUD) to prevent pregnancy. Once in the tissue, the bacteria cause an abscess, producing a hard, red to reddish-purple lump, often on the jaw, from which comes the condition's common name, 'lumpy jaw.' Eventually, the abscess breaks through the skin surface to produce a draining sinus tract.Symptoms may include any of the following: Draining sores in the skin, especially on the chest wall from lung infection with actinomyces Fever Mild or no pain Swelling or a hard, red to reddish-purple lump on the face or upper neck Weight loss.The health care provider will perform a physical exam and ask about your symptoms. Tests that may be done to check for presence of the bacteria include: Culture of the tissue or fluid Examination of drained fluid under a microscope CT scan of affected areas.Treatment of actinomycosis usually requires antibiotics for several months to a year. Surgical drainage or removal of the affected area (lesion) may be needed. If the condition is related to an IUD, the device must be removed.Full recovery can be expected with treatment.In rare cases, meningitis can develop from actinomycosis.Call your provider if you develop symptoms of this infection. Starting treatment right away helps quicken the recovery.Good oral hygiene and regular dentist visits may help prevent some forms of actinomycosis.Lumpy jaw.Actinomycosis (lumpy jaw) Actinomycosis (lumpy jaw).Brook I. Actinomycosis.Encyclopedia Entry for Actinomycosis :Actinomycosis. Source of disease: Actinomyces israelii, Actinomyces gerencseriae and Propionibacterium propionicus