Actinomycosis

Definition

Actinomycosis is a bacterial infection that results in collections of pus in the body.
Abdominal Abscess
Abdominal Abscess
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Causes

Actinomycosis is most often caused by infection by specific bacteria. This is normally present in the mouth and, sometimes, in the intestines. The jaw is most commonly involved, with lung and abdominal infections being less common. Rarely, women may develop abscesses in the reproductive organs or bladder.

Risk Factors

Factors that may increase your risk of actinomycosis include:
  • Having a dental disease or recent dental surgery
  • Liquids or solids that are sucked into the lungs
  • Having bowel surgery
  • Swallowing fragments of chicken or other bones
  • Having an intrauterine contraceptive device (IUD) in place for many years
  • Diabetes
  • Having a weakened immune system
  • Malnutrition
  • Tissue damage
  • Chronic granulomatous disease or other disorder that affects the immune system (children)

Symptoms

Actinomycosis may cause:
  • Hard swellings that are usually painless and located around the mouth, neck, or jaw
  • Swellings that may produce pus containing tiny, yellowish particles
  • Drainage of pus through the skin of the chest or abdomen
  • Fever
  • Weight loss
  • Cough that produces sputum or blood
  • Noticeable swelling or firm mass in the abdomen, especially the lower part

Diagnosis

You will be asked about your symptoms and medical history. A physical exam will be done. Tests may include:
  • Analyses of pus, sputum, or tissue
  • X-ray

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