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16S rRNA RefSeq: V15.22    Genomic RefSeq: V9.15
Genus: Actinomyces
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No Notes
percent abundance
SubPSupPKGBMHPSVTHPTTDST
Avg7.7959.0530.6452.3893.9732.4255.4904.4077.7930.028
Stdev8.9248.7041.3893.3624.0292.3984.9194.4306.6970.352
No Notes
percent abundance
SubPSupPKGBMHPSVTHPTTDST
Avg9.90511.0060.7001.9691.2900.9742.2851.5512.5390.001
10thp1.3301.3270.0000.0840.0940.1120.1160.1710.0940.000
90thp22.26824.6842.5894.7752.6712.0234.0924.3826.2400.000
Stdev10.64810.1801.3073.1442.0941.2644.2892.1443.9400.007
Prev98.70197.40380.51994.80596.10493.50694.80596.10496.1045.195
No Notes
percent abundance
SubPSupPKGBMHPSVTHPTTDST
Avg3.2233.5830.1880.7430.6310.3660.8510.7001.0450.001
10thp0.2770.4410.0000.0000.0340.0320.0530.0240.0270.000
90thp8.6978.0380.3671.4851.4000.8291.7081.7152.3440.000
Stdev5.3624.8460.5181.5241.2280.5191.3051.2181.7670.004
Prev99.32499.32456.08188.51493.91992.56894.59591.21691.2162.797
From: Dewhirst 35x9 data (not published yet)
No Notes
percent abundance
SubPSupPKGBMHPSVTHPTTDNS
Avg5.7587.0680.6270.8240.7920.6780.9670.7910.8190.007
10thp0.3130.5590.0170.0630.0530.0210.0880.0550.0230.000
90thp13.73721.9451.4012.5021.6511.7942.2471.6181.7160.008
Stdev8.0669.9191.3971.0680.6340.9621.3061.3911.5410.022
Prev100.000100.00097.222100.000100.000100.000100.000100.000100.00020.000
Overview: Bacteria of the genus Actinomyces are abundant in the healthy oral microbiome, making up 5-10% of the cells in dental plaque. In 2018 some species formerly considered to be Actinomyces were reclassified into genus Schaalia, including several species abundant on the tongue (Nouioui et al. 2018). Twelve oral species remain in the genus Actinomyces include A. naeslundii, A. oris, and A. graevenitzii.

Ecological role/importance in health and disease: A. naeslundii and its relatives are early colonizers in the dental plaque biofilm (Diaz et al. 2006, Dige et al. 2009). A. graevenitzii is abundant in the biofilm on the tongue. Some species, particularly A. israelii and A. gerencseriae, are in lower abundance in the healthy microbiome but can cause opportunistic infections known as actinomycosis.