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Classification and external resources
Specialty infectious disease
ICD-10 A28.8
ICD-9-CM 027.8
DiseasesDB 31173
MeSH D000187

Actinobacillosis is a zoonotic disease caused by Actinobacillus.[1]

It is more commonly associated with animals than with humans.[2]

One of the most common forms seen by veterinarians is mouth actinobacillosis of cattle, due to Actinobacillus lignieresii. The most prominent symptom is the swelling of the tongue that protudes from the mouth and is very hard at palpation ("wooden tongue").

Actinobacillus suis is an important disease of pigs of all ages and can lead to severe morbidity and sudden death.[3]


The infection is most commonly caused by abrasions on different soft tissues through which the bacteria, Actinobacillus lignieresii, enters. These soft tissues include subcutaneous tissues, the tongue, lymph nodes, lungs, and various tissues in the gastrointestinal tract. The injury results in different forms and locations of the disease depending on the location of the tissue. The commensal bacteria is also commonly found in the oral cavity, gastrointestinal tract, and reproductive tract, sometimes resulting in disease.[4] There are generally one or two cases of actinobacillosis per herd found in adult cows, foals or adult horses, and other similar animals.[5][6]

Differential diagnosis[edit]

Mouth actinobacillosis of cattle must be differentiated from actinomycosis that affects bone tissues of the maxilla.

See also[edit]


  1. ^ "Merck Veterinary Manual". 
  2. ^ "Dorlands Medical Dictionary:actinobacillosis". 
  3. ^ "Actinobacillosis - Pig reviewed and published by Wikivet". Retrieved 7 October 2011. 
  4. ^ "A Retrospective Study of Equine Actinobacillosis Cases 1999-2011". Journal of Veterinary Diagnostic Investigation. 26. doi:10.1177/1040638714531766. 
  5. ^ Boden, Edward (2015). Black's Veterinary Dictionary. Bloomsbury Publishing. p. 10. ISBN 9781408181287 – via EBL. 
  6. ^ Buttenschøn, J. (1989-02-12). "The Occurrence of Lesions in the Tongue of Adult Cattle and their Implications for the Development of Actinobacillosis". Journal of Veterinary Medicine, Series A. 36 (1-10): 393–400. doi:10.1111/j.1439-0442.1989.tb00745.x. ISSN 1439-0442.