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Discussion on Research Summary: Actinomyces a common cause of lymph node abscessation
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Moderator:
DrO
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Posted on Tuesday, Apr 1, 2008 - 12:38 pm:
Abscessation of the lymph nodes under and behind the jaw is a common event in horses most often following Strangles infection. Not uncommon is these lymph nodes abscessing with no history of respiratory disease however. Often these abscesses are caused by the commonly found intraoral faculative anerobe bacterium Actinomyces and metronidazole a good first choice of therapy until sensitivity results can be run.
Vet Rec. 2008 Jan 5;162(1):18-20.
Actinomyces species as a cause of abscesses in nine horses.
Fielding CL, Magdesian KG, Morgan RA, Ruby RE, Sprayberry KA.
Loomis Basin Equine Medical Center, 3901 Sierra College Boulevard, Loomis, CA 95650, USA.
The characteristics, history, clinical signs, treatment and outcome of nine horses with abscesses caused by Actinomyces species were reviewed. dna sequencing was used to determine the species of one of the isolates. The horses were one to 11 years of age, and the abscesses were most commonly located in the submandibular and retropharyngeal regions. The bacterium was usually cultured as the sole isolate and the horses were most often affected in the autumn. Most of the abscesses were treated with antimicrobials and drainage, but some of them recurred. The horses with submandibular abscesses had residual scar tissue that in some cases did not resolve.
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