Felis ISSN 2398-2950

Actinomyces viscosus

Synonym(s): A. viscosus

Contributor(s): Melissa Kennedy

Introduction

Classification

Taxonomy

  • Genus: Actinomyces.
  • Family: Actinomycetes.
  • Order: Actinomycetales.

Etymology

  • Gk: actino- ray; myces- fungus. L: viscum- bird-lime; viscosus- sticky.

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Clinical Effects

Epidemiology

Habitat

  • Oral mucous membranes and tooth surfaces.
  • May be found secondarily in the gastrointestinal tract.

Lifecycle

  • Bacterial colonies form in tissue in microaerophilic conditions.

Transmission

  • Most infections are endogenous.
  • May be transmitted by biting.

Pathological effects

  • Actinomycotic lesions in pigs, cats, hamsters and humans.
  • Dogs, causes:
    • Localized cutaneous granulomas and abscesses. Indistinguishable clinically from Nocardia.
    • Thoracic granulomata and pyothorax. May be associated with foreign body migration.

Control

Control via chemotherapies

A. viscosus infections respond well to penicillin Benzylpenicillin and other antibiotics Therapeutics: antimicrobial drug, unlikeNocardia infections Nocardia spp.

Other countermeasures

  • Drainage of pus.

Diagnosis

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Further Reading

Publications

Refereed papers

  • Recent references from VetMed Resource and PubMed.
  • Murakami S, Yamanishi M W, Azuma R (1997) Lymph node abscess due to Actinomyces viscosus in a cat. J Vet Med Sci 59(11), 1079-1080.

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