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Actinomycosis

 

Definition

Actinomycosis is a bacterial infection that causes pus to collect in the body. The type depends on where it starts:

  • Jaw
  • Lungs
  • Abdomen
  • Uterus

Rarely, the infection can spread from one place in the body to another.

Abdominal Abscess

Abdominal Abscess

Copyright © Nucleus Medical Media, Inc.

 

Causes    TOP

Certain bacteria cause actinomycosis. They are normal in the mouth and sometimes in the bowels. They get into the body through breaks in the tissues. Tooth decay causes infections in the mouth and jaw. This is the most common type.

 

Risk Factors    TOP

Your chances of this infection are higher if you:

  • Are male
  • Have dental problems or had dental work
  • Draw in saliva, food, or drink into your lungs
  • Have long-lasting lung disease
  • Had bowel surgery
  • Have problems with an intrauterine device (IUD)
  • Have diabetes
  • Have weak immunity
  • Are malnourished
 

Symptoms    TOP

Symptoms depend on the where the infection starts. These may involve:

  • Swelling in the mouth, neck, or jaw
  • Pus that has tiny, yellowish specks
  • Pus that drains through the skin
  • Fever
  • Weight loss
  • Cough—with or without phlegm or blood
  • Swelling or a firm mass in the abdomen—mainly in the lower part
 

Diagnosis    TOP

The doctor will ask about your symptoms and health history. You may have:

  • A physical exam
  • Testing of fluids, pus, or phlegm
  • A biopsy
 

Treatment    TOP

Antibiotics treat the infection. Care also involves draining the infection site.

It’s common for the infection to come back, even after getting care.

 

Prevention    TOP

Taking care of your mouth and teeth are the best way to lower your chances of infection. This involves:

  • Brushing your teeth twice a day
  • Flossing daily
  • Replacing your toothbrush every 3-4 months
RESOURCES:

Family Doctor—American Academy of Family Physicians
https://familydoctor.org

Mouth Healthy—American Dental Association
https://www.mouthhealthy.org

CANADIAN RESOURCES:

Canadian Dental Association
http://www.cda-adc.ca

Health Canada
http://www.hc-sc.gc.ca

REFERENCES:

Actinomycosis. Merck Manual Professional Version website. Available at: https://www.merckmanuals.com/professional/infectious-diseases/anaerobic-bacteria/actinomycosis. Updated January 2018. Accessed May 21, 2018.

Cervicofacial actinomycosis. EBSCO DynaMed Plus website. Available at: http://www.dynamed.com/topics/dmp~AN~T116458/Cervicofacial-actinomycosis . Updated June 5, 2017. Accessed May 21, 2018.

Hall V. Actinomyces—gathering evidence of human colonization and infection. Anaerobe. 2008;14(1):1-7.

Naik NH, Russo TA. Bisphosphonate-related osteonecrosis of the jaw: the role of actinomyces. Clin Infect Dis. 2009;49(11):1729-1732.

Sullivan DC, Chapman SW. Bacteria that masquerade as fungi: actinomycosis/nocardia. Proc Am Thorac Soc. 2010;7(3):216-221.

Valour F, Sénéchal A, Dupieux C, et al. Actinomycosis: etiology, clinical features, diagnosis, treatment, and management. Infect Drug Resist. 2014;7:183-197.



Last reviewed May 2018 by David L. Horn, MD, FACP
Last Updated: 5/21/2018

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