TABLE 1.
DNA-DNA similarity and physiological differences for strains with identical 16S rRNA gene sequencesa
| Strain pair | DNA-DNA similarity (%) | Size of fragment (bp) | Physiological differences | Reference(s) |
|---|---|---|---|---|
| Escherichia coli K-12 and O157:H7 | ND | 1,542b | Virulence factors for hemorrhagic colitis | 9, 39 |
| Nodularia sp. strains GR8b and BY1 | ND | 1,445 | Formation of gas vesicles | 28 |
| Bacillus cereus NCTC11143 (= DSMZ4312) and Bacillus anthracis Sterne | ND | 1,446 | Pathogenicity; toxin and capsule formation | 4 |
| Mycobacterium intracellulare ATCC 35762 and ATCC 35772 | 88 | 1,493 | Serological properties | 10, 18 |
| Pelczaria aurantia DSM 12801T and Kocuria rosea DSM 20447T | 87.1 | 1,502 | Oxidase reaction | 49 |
| Yersinia pestis 1122 and Yersinia pseudotuberculosis P62 /P3 | 84-100 | 1,497 | Y. pestis-specific virulence plasmids pFra and pPla; motility at 28°C; urease; rhamnose fermentation; requirement for amino acids; bubonic/pneumonic plague versus mesenteric lymphademitis; transmission route, flea bite versus fecal-oral route | 8, 55 |
| Ochrobactrum anthropi 1a and LMG 5140 | 84.5 | 1,307 | BIOLOG GN test | 27 |
| Aeromonas salmonicida NCIMB2020T and Aeromonas sp. strain CIP7340 | 50 | 1,502 | ND | 15 |
| Brevundimonas alba H12C5 and 18 | 73.5 | 1,361 | Carbon substrates; oxidase | This study |
| Brevundimonas alba H12C5 and 24 | 86.5 | 1,361 | Carbon substrates; oxidase | This study |
| Brevundimonas alba H12C5 and 20 | 30.1 | 1,361 | Carbon substrates; oxidase; in situ growth | This study |
a
Only strains with identical 16S rRNA gene sequences are shown. ND, not determined.
b
rrsE gene.