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Table 1 Summary of community classes and their stability in human habitats

From: Exploration of bacterial community classes in major human habitats

Habitat type Habitats Silhouette value Clusters Membership Dominant genera ARI for two visits
Type I Posterior fornix 0.86 3 3/5/80 Gardnerella / Prevotella / Lactobacillus 0.57
Mid-vagina 0.78 2 7/81 Anaerobic genera / Lactobacillus 0.58
Vaginal introitus 0.66 2 13/67 Anaerobic genera / Lactobacillus 0.44
Left retroauricular crease 0.6 3 6/14/158 Corynebacterium / Staphylococcus / Propionibacterium 0.56
Right retroauricular crease 0.52 6 4/4/4/4/19/154 Neisseriaceae_Unclassified a / Corynebacterium / Pelomonas / Anaerococcus / Staphylococcus / Propionibacterium 0.47
Type II Left antecubital fossa 0.30 5 2/6/7/28/30 Sporacetigenium / Staphylococcus / Ralstonia/ Propionibacterium / Corynebacterium 0.07
Right antecubital fossa 0.37 6 3/3/4/6/8/61 Streptophyta / Corynebacterium / Staphylococcus / Streptococcus / Haemophilus b / Propionibacterium 0.16
Keratinized gingiva 0.32 2 59/140 Prevotellaceae_Unclassified / Streptococcus 0.37
Buccal mucosa 0.28 2 32/153 Haemophilus / Streptococcus 0.12
Hard palate 0.25 2 10/183 Veillonella /Streptococcus 0.04
Anterior nares 0.24 4 8/13/44/101 Moraxella / Staphylococcus / Propionibacterium / Corynebacterium 0.26
Stool 0.25 3 15/66/128 Prevotella / Ruminococcaceae a / Bacteroides 0.26
Tongue dorsum 0.18 3 35/77/94 NA  
Subgingival plaque 0.21 2 97/104 NA  
Throat 0.19 2 91/93 NA  
Supragingival plaque 0.15 2 97/111 NA  
Palatine tonsils 0.17 2 96/103 NA  
Saliva 0.14 2 89/93 NA  
  1. aNeisseriaceae in retroauricular crease and Ruminococcaceae in stool are the dominant orders (not genera).
  2. bA heterogeneous group.
  3. ARI, Adjusted Rand Index; NA, not applicable (indicator genera are not shown because of very low silhouette value).