TABLE 1.
Transfer frequency of tetracycline resistance and the presence of ermA and ermC genes in transconjugants
| Transconjugant | Transfer frequencya (10−3) | ermA | ermC |
|---|---|---|---|
| Group 1b | |||
| p45-c16 | 4.12 | + | − |
| p45-c18 | 4.56 | + | − |
| p45-c772 | 4.32 | + | − |
| p58-c657 | 4.51 | + | − |
| p62-c656 | 4.78 | + | − |
| p62-c657 | 4.66 | + | − |
| p62-c660 | 4.58 | + | − |
| p62-c661 | 4.90 | + | − |
| p62-c720 | 4.05 | + | − |
| p62-c722 | 4.02 | + | − |
| p63-c18 | 4.00 | + | − |
| Group 2c | |||
| p46-c716 | 4.22 | + | − |
| p58-c803 | 4.72 | + | − |
| p62-c712 | 4.85 | + | − |
| p63-c716 | 4.11 | + | − |
| Group 3d | |||
| p45-c29 | 4.32 | + | + |
| p45-c722 | 4.50 | + | + |
| p46-c714 | 4.35 | + | + |
| p46-c796 | 4.12 | + | + |
| p58-c18 | 4.22 | + | + |
| p58-c714 | 4.81 | + | + |
| p63-c29 | 4.10 | + | + |
| Group 4e | |||
| p58-c716 | 4.22 | + | + |
a
The transfer frequency represents the average of three plating experiments.
b
The recipients had multiple inserts of the ermA gene but acquired an extra copy of the gene.
c
The recipients had neither the ermA nor the ermC gene but acquired the ermA gene.
d
The recipients had ermA but acquired the ermC gene and an extra copy of the ermA gene.
e
The recipient acquired both ermA and ermC genes.