# The Oral Microbiome of Healthy Japanese People at the Age of 90
## 3 Results
### Candidates for Core Microbiome and Core-Microbiome Analysis  
Table 1 shows the bacterial species detected in more than 90% of subjects. Thirteen species were detected in all subjects. Among these 13 species, eight species were from the _Streptococcus_ genus. These species represent potential candidates for the core oral microbiome. These 13 species are visualized using a phylogenetic tree and core heatmap in Figure 3.  
\begin{table}
\begin{tabular}{c c c c c c} \hline  & \multicolumn{3}{c}{**Taxonomy**} & \multicolumn{2}{c}{**Prevalence**} & \multirow{2}{*}{**Abundance (Average)**} \\ \cline{2-4} \cline{5-6}  & **Phylum** & **Genus** & **Species** & & **(\%)** & **Abundance (Average)** \\ \hline \hline \multirow{7}{*}{**100\%**} & Firmicutes & _Streptococcus_ & _Streptococcus sinensis_ & 85/85 & 100\% & 10.14\% \\  & Firmicutes & _Streptococcus_ & _Streptococcus pneumoniae_ & 85/85 & 100\% & 9.61\% \\  & Firmicutes & _Streptococcus_ & _Streptococcus salivirus_ & 85/85 & 100\% & 8.75\% \\  & Actinobacteria & _Rothia_ & KV831974\_s & 85/85 & 100\% & 8.30\% \\  & Firmicutes & _Streptococcus_ & _Streptococcus paras parasinguitis_ & 85/85 & 100\% & 6.13\% \\  & Firmicutes & _Vellomella_ & _Vellomella dispar_ & 85/85 & 100\% & 4.31\% \\  & Firmicutes & _Granuliotella_ & _Granuliotella diacars_ & 85/85 & 100\% & 2.90\% \\  & Firmicutes & _Streptococcus_ & _Streptococcus parvis_ & 85/85 & 100\% & 2.80\% \\  & Firmicutes & _Streptococcus_ & _Streptococcus parvis_ & 85/85 & 100\% & 2.67\% \\  & Actinobacteria & _Actinomyces_ & KE952139\_s & 85/85 & 100\% & 1.72\% \\  & Firmicutes & _Veillonella_ & _Veillonella purcula_ & 85/85 & 100\% & 1.15\% \\  & Actinobacteria & _Atropbium_ & _Atropbium purculum_ & 85/85 & 100\% & 0.89\% \\  & Firmicutes & _Streptococcus_ & AFQU\_s & 85/85 & 100\% & 0.77\% \\ \hline \hline \multirow{7}{*}{**99\%**} & Firmicutes & _Veillonella_ & _Veillonella atypia_ & 84/85 & 98.8\% & 2.22\% \\  & Actinobacteria & _Actinomyces_ & _Actinomyces_ & 84/85 & 98.8\% & 0.30\% \\  & Firmicutes & _Veillonella_ & _Veillonella\_\_uc & 84/85 & 98.8\% & 0.25\% \\  & Actinobacteria & _Rothia_ & _Rothia unclaginous_ & 83/85 & 97.6\% & 5.43\% \\  & Firmicutes & _Gemella_ & _Gemella haemolysens_ & 83/85 & 97.6\% & 1.23\% \\  & Actinobacteria & _Rothia_ & _Rothia_, _v8/85 & 97.6\% & 0.28\% \\  & Proteobacteria & _Campylobacter_ & _Campylobacter concisus_ & 83/85 & 97.6\% & 0.10\% \\  & Bacteroides & _Prevetella_ & _Prevetella melanogaster_ & 82/85 & 96.5\% & 2.92\% \\  & Firmicutes & _Streptococcus_ & _Streptococcus syndomi_ & 82/85 & 96.5\% & 1.78\% \\  & Firmicutes & _Moryella_ & _Stomatokuclum longgun_ & 82/85 & 96.5\% & 0.31\% \\  & Actinobacteria & _Actinomyces_ & JVLH\_s & 82/85 & 96.5\% & 0.18\% \\  & Actinobacteria & _Rothia_ & _Rothia dentocaris_ & 81/85 & 95.3\% & 1.36\% \\  & Firmicutes & _Bulletia_ & _Solobacterium movie_ & 81/85 & 95.3\% & 0.20\% \\ \hline \hline \multirow{7}{*}{**100\%**} & Fusobacteria & _Fusobacteriumrium_ & _Fusobacterium incultatumAccording to Figure 3, eight species of _Streptococcus_ were not adjacent. _Streptococcus sinensis_ and _Streptococcus pneumoniae_ were highly prevalent and abundant species.