TABLE 2.
Acquired genes and variability in mtr(R) promoter region
| Organism and year(s) isolated | No. of isolates | No. (%) of isolates with indicated gene:
|
||||
|---|---|---|---|---|---|---|
| erm(B) | erm(C) | erm(F) | mef(A) | Wild type | ||
| N. gonorrhoeae | ||||||
| 1940-69 | 7 | 1 (14)a | 1 (14) | 1 (14) | 2 (28) | 7 (100) |
| 1970s | 26 | 2 (8) | 2 (8) | 6 (23) | 8 (30) | 25 (96) |
| 1980s | 43 | 2 (5) | 5 (13) | 6 (13) | 3 (8) | 32 (74) |
| N. meningitides | ||||||
| 1963-1987 | 7 | 1 (14) | 1 (14) | 2 (28) | 2 (28) | 2 (28)a |
a
Two isolates had the same sequence as wild-type N. gonorrhoeae; sequences of the other five were 96 to 97% identical with wild-type N. gonorrhoeae and the N. meningitides genome.