Table 4.

Transfer frequencies of the Tn916-Tn1545 family in oral streptococci per recipients

Donor (element)	S. oralis SOK10	S. mitis SMK7	S. sanguinis Sg10	S. gordonii G3	S. mutans M8	S. oralis SO32
Bacillus subtilis BS49; TetR ::Tn916	4.7 (± 8.1) × 10−6	6.0 (± 4.03) × 10−9	2.9 (± 4.9) × 10−5	1.5 (±0.25) × 10−1	3.2 (± 4.1) × 10−6	Not detected
S. sanguinis Ssg41; Clinical isolate TetR :: Tn916	3.5 (± 6.0) × 10°	1.7 (± 1.8) × 10−1	1.0 (±0.09) × 10−6	1.0 (± 1.7) × 10−3	3.0 (± 4.6) × 10−6	4.0 (± 3.0) × 10−7
S. oralis SO52; Clinical isolate TetR :: Tn916	3.1 (± 2.3) × 10−2	2.1 (± 1.2) × 10−2	6.2 (±0.09) × 10−2	4.7 (± 4.1) × 10−1	6.2 (±0.09) × 10−2	8.4 (±0.01) × 10−3
S. mitis SM28; Clinical isolate TetR ::Tn6815	2.9 (± 3.1) × 10−3	2.5(± 3.9) × 10−3	7.4 (± 9.7) × 10−6	1.4 (± 3.5) × 10−3	3.3 (± 5.4) × 10−2	5.8 (± 3.6) × 10−2
S. constellatus SC99; Clinical isolate :: TetR Tn6816	2.2 (± 1.9) × 10−3	1.2 (± 2.1) × 10−2	1.5 (± 2.7) × 10−1	1.0 (± 1.6) × 10−1	1.8 (± 2.0) × 10−3	Not detected

Tet^{R –} Tetracycline resistant