ACTINOBACILLOSIS IN CATTLE PDF

Also known as: Actinobacillosis Wooden tongue is a bacterial infection as a result of abrasions in the mouth. It is caused by Actinobacillus lignieresii, part of the normal bacterial flora of the upper digestive tract. The bacteria usually invade the skin through a wound or minor trauma caused by sticks, cereal awns or similar. The disease is fairly acute , with swelling in the affected part, under the jaw and in the regional lymph nodes. The clinical symptoms are excess salivation, difficult mastication and inappetence. Additionally, cutaneous actinobacillosis has been reported Milne et al.

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J Vet Diagn Invest. Epub Dec 4. Natural lymphatic "atypical" actinobacillosis in cattle caused by Actinobacillus lignieresii. Bovine actinobacillosis is typically characterized by pyogranulomatous glossitis wooden tongue. The involvement of other tissues, generally the skin or lymph nodes, has been regarded as atypical or cutaneous. We describe herein 2 outbreaks of actinobacillosis affecting primarily the lymph nodes of the head and neck.

The disease affected 40 of lactating cows in a dairy herd, and 5 of two-y-old steers in a beef herd. Multiple or single, occasionally ulcerated nodules were observed in the region of the mandible, neck, and shoulder, including the parotid, submandibular, retropharyngeal, and prescapular lymph nodes.

The histologic lesions were multifocal pyogranulomatous lymphadenitis, dermatitis, and cellulitis with Splendore-Hoeppli material. One steer had an exophytic pyogranuloma in the gingiva and another died because of ruminal tympany secondary to oropharyngeal and esophageal obstruction by a pyogranulomatous mass.

Actinobacillus lignieresii was isolated from the lesions and identified by amplification, sequencing, and analysis of the 16S ribosomal r DNA gene. Seven of 8 cows recovered after treatment with sodium iodide. Lymphatic actinobacillosis is a frequent disease in Uruguay, southern Brazil, and Argentina. Later, lesions may extend to the subcutaneous tissue and the skin, causing ulceration.

Affected cattle with draining pyogranulomas contaminate the environment, favoring disease transmission, and should be treated with sodium iodide or antibiotics and isolated from the herd in order to control the disease.

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Natural lymphatic ("atypical") actinobacillosis in cattle caused by Actinobacillus lignieresii.

Abstract Bovine actinobacillosis is typically characterized by pyogranulomatous glossitis wooden tongue. The involvement of other tissues, generally the skin or lymph nodes, has been regarded as atypical or cutaneous. We describe herein 2 outbreaks of actinobacillosis affecting primarily the lymph nodes of the head and neck. The disease affected 40 of lactating cows in a dairy herd, and 5 of two-y-old steers in a beef herd. Multiple or single, occasionally ulcerated nodules were observed in the region of the mandible, neck, and shoulder, including the parotid, submandibular, retropharyngeal, and prescapular lymph nodes. The histologic lesions were multifocal pyogranulomatous lymphadenitis, dermatitis, and cellulitis with Splendore—Hoeppli material. One steer had an exophytic pyogranuloma in the gingiva and another died because of ruminal tympany secondary to oropharyngeal and esophageal obstruction by a pyogranulomatous mass.

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Wooden Tongue

The disease has a chronic course, and the general condition can remain quite good. There is a swelling of the maxilla and mandible. Later on, a granuloma will form in the place of fistulisation. The bony lesions are followed by periostitis , with permanent deformation of the facial bones. Other parts of the body other than the mouth area can be infected by actinomyces.

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Actinobacillose (Rind)

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