TABLE 1.
Toxigenic status of Korean C. difficile strains by year of isolation
| Year of isolation (no. of isolates tested) | No. (%) of isolates with toxin status
|
|||
|---|---|---|---|---|
| A+ B+ CDT− | A+ B+ CDT+ | A− B+ CDT− | A− B− CDT− | |
| 1980 (3) | 2 (66.7) | 0 (0.0) | 0 (0.0) | 1 (33.4) |
| 1990 (12) | 9 (75.0) | 0 (0.0) | 0 (0.0) | 3 (25.0) |
| 1995 (48) | 34 (70.8) | 1 (2.1) | 2 (4.2) | 11 (22.9) |
| 2002 (46) | 28 (60.9) | 0 (0.0) | 6 (13.0) | 12 (26.1) |
| 2003 (105) | 67 (63.8) | 0 (0.0) | 16 (15.2) | 22 (21.0) |
| 2004 (53) | 22 (41.5) | 1 (1.9) | 21 (39.6) | 9 (17.0) |
| 2005 (40) | 15 (37.5) | 1 (2.5) | 12 (30.0) | 12 (30.0) |
| 2006 (155) | 73 (47.1) | 6 (3.9) | 42 (27.1) | 34 (21.9) |
| Total (462) | 250 (54.1) | 9 (2.0) | 99 (21.4) | 104 (22.5) |