Table 2. Taxonomic identity of indicator OTUs in different environments at a hospital.
| Environment | Indicator OTU class | Indicator OTU family | Indicator OTU closest BLAST hit | Indicator OTU % ID |
|---|---|---|---|---|
| Indoor | Actinobacteria | Actinomycetales | Kytococcus sedentarius | 98.8 |
| Mechanical | Bacteroidetes | Flavobacteriaceae | ||
| Firmicutes | Staphylococcaceae | Staphylococcus epidermidis* | 99.1 | |
| S. haemolyticus* | 98.5 | |||
| Proteobacteria | Burkholderiaceae | Ralstonia pickettii* | 98.2 | |
| Caulobacteraceae | ||||
| Enterobacteriaceae | Enterobacter spp. | 98.5 | ||
| Indoor | Actinobacteria | Actinomycetales | Kocuria rhizophila | 96.1 |
| Window | Micrococcus luteus | 99.7 | ||
| Cyanobacteria | Bacillariophyta | |||
| Proteobacteria | Acetobacteraceae | |||
| Moraxellaceae | ||||
| Rhodobacteraceae | ||||
| Outdoor | Acidobacteria | |||
| Actinobacteria | Acidimicrobiales | |||
| Actinomycetales | ||||
| Solirubrobacterales | ||||
| Bacteroidetes | Chitinophagaceae | |||
| Cytophagaceae | ||||
| Chloroflexi | Chloroflexaceae | |||
| Cyanobacteria | Bangiophyceae | Microcystis aeruginosa | 95.1 | |
| Streptophyta | Prochlorococcus marinus | 95 | ||
| Deinococcus-Thermus | Deinococcaceae | |||
| Gemmatimonadetes | Gemmatimonadaceae | |||
| Proteobacteria | Acetobacteraceae | |||
| Beijerinckiaceae | Methylocella silvestris | 95.2 | ||
| Bradyrhizobiaceae | ||||
| Caulobacteraceae | ||||
| Erythrobacteraceae | ||||
| Halothiobacillaceae | ||||
| Methylobacteriaceae | Methylobacterium extorquens | 96.7 | ||
| M. radiotolerans | 99.0 | |||
| Methylococcaceae | ||||
| Methylocystaceae | ||||
| Oxalobacteraceae | ||||
| Pasteurellaceae | ||||
| Rhodospirillaceae | ||||
| Sinobacteraceae | ||||
| Sphingomonadaceae | ||||
| Verrucomicrobia |
Abbreviations: BLAST, Basic Local Alignment Search Tool; OUT, operational taxonomic unit; RDP, Ribosomal Database Project.
Indicator OTUs are OTUs with greater abundance and occurrence frequency in an environment than expected by chance. Taxonomic identity based on assignment to class/family by the RDP taxonomic classifier. The closest BLAST hit in the reference database is shown for indicator OTUs with 95% or greater sequence similarity to reference taxa. Asterisk symbols indicate potentially pathogenic indicator taxa with 97% or greater similarity to known human pathogens.