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Actinomyces israelii.jpg
Scanning electron micrograph of Actinomyces israelii.
Scientific classification e
Domain: Bacteria
Phylum: Actinobacteria
Class: Actinobacteria
Order: Actinomycetales
Suborder: Actinomycineae
Family: Actinomycetaceae
Buchanan, 1917

The Actinomycetaceae(often called actinomycetes or mycilial bacteria) comprise a family of bacteria in the order Actinomycetales that contains the medically important genus Actinomyces. This family contains three potentially pathogenic genera: Actinomyces, Nocardia, and Streptomyces. These organisms are closely related to the mycobacteria, but were originally classified as fungi because they were thought to be transition forms between bacteria and fungi.


The currently accepted taxonomy is based on the List of Prokaryotic names with Standing in Nomenclature [1] and National Center for Biotechnology Information (NCBI)[2] and the phylogeny is based on 16S rRNA-based LTP release 106 by 'The All-Species Living Tree' Project[3]




Actinomyces [incl. Mobiluncus and Varibaculum]


  1. ^ J.P. Euzéby. "Actinomycetaceae". List of Prokaryotic names with Standing in Nomenclature (LPSN). Retrieved 2011-11-17. 
  2. ^ Sayers; et al. "Actinomycetaceae". National Center for Biotechnology Information (NCBI) taxonomy database. Retrieved 2011-06-05. 
  3. ^ 'The All-Species Living Tree' Project."16S rRNA-based LTP release 106 (full tree)" (PDF). Silva Comprehensive Ribosomal RNA Database. Retrieved 2011-11-17. 

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