TABLE 2.
Clustering of M. tuberculosis strains with more than four copies of IS6110 and isolated from patients in Norway
| No. of: | Cluster sizea at end of:
|
Geographic origin(s) (age or age range) of patients diagnosed inb:
|
||||
|---|---|---|---|---|---|---|
| IS6110 copies | Isolates in 1999 to 2001 | Clusters in 1999 to 2001 | 1998 (yr of index case) | 2001 | 1994-1998 | 1999-2001 |
| 5 | 14 | 2 | 0 | 2 | — | Somalia (21 and 31) |
| 4 (1995) | 5 | Former Yugoslavia (24-46) | Former Yugoslavia (37) | |||
| 6 | 14 | 2 | 4 (1995) | 5 | Somalia (21-33) | Somalia (12) |
| 1 (1996) | 3 | Norway (85) | Former Yugoslavia (39) and Somalia (13) | |||
| 7 | 38 | 7 | 1 (1996) | 2 | Norway (76) | Former Yugoslavia (87) |
| 1 (1998) | 2 | Somalia (34) | Turkey (34) | |||
| 1 (1998) | 2 | Ethiopia (30) | Ethiopia (31) | |||
| 0 | 2 | — | Former Yugoslavia (1 and 27) | |||
| 1 (1998) | 4 | Norway (61) | Norway (31, 33, and 80) | |||
| 6 (1995) | 9 | Norway (44-83) | Norway (26, 47, and 75) | |||
| 1 (1995) | 2 | Norway (68) | Norway (74) | |||
| 8 | 44 | 8 | 1 (1998) | 2 | Norway (87) | Norway (87) |
| 1 (1997) | 2 | Pakistan (3) | Pakistan (51) | |||
| 0 | 3 | — | Former Yugoslavia (26, 28, and 41) | |||
| 1 (1994) | 2 | Somalia (27) | Former Yugoslavia (27) | |||
| 6 (1995) | 7 | Norway (33-66) | Norway (67) | |||
| 1 (1998) | 2 | Norway (86) | Norway (71) | |||
| 1 (1998) | 2 | Former Yugoslavia (24) | Former Yugoslavia (71) | |||
| 1 (1994) | 2 | Norway (44) | Norway (75) | |||
| 9 | 60 | 7 | 0 | 3 | — | Norway (72 and 83) and The Gambia (33) |
| 0 | 2 | — | Norway (79 and 82) | |||
| 1 (1995) | 2 | Former Yugoslavia (33) | Former Yugoslavia (29) | |||
| 1 (1998) | 2 | Norway (80) | Norway (59) | |||
| 0 | 3 | — | Somalia (21 and 22) and Ethiopia (35) | |||
| 3 (1997) | 4 | Somalia (19, 23, and 24) | Somalia (3) | |||
| 0 | 2 | — | Somalia (14 and 34) | |||
| 10 | 62 | 3 | 1 (1996) | 2 | Norway (65) | Norway (80) |
| 1 (1997) | 2 | Norway (54) | Somalia (26) | |||
| 1 (1996) | 2 | Norway (39) | Former Soviet Union (20) | |||
| 11 | 57 | 6 | 12 (1996) | 16 | Norway (36-86) | Norway (45-80) |
| 0 | 2 | — | The Philippines (35 and 39) | |||
| 1 (1998) | 2 | Norway (76) | Norway (73) | |||
| 0 | 5 | — | Somalia (3-21) | |||
| 1 (1998) | 2 | Somalia (14) | Angola (23) | |||
| 1 (1997) | 2 | Somalia (28) | Somalia (17) | |||
| 12 | 54 | 5 | 4 (1996) | 5 | Norway (39-50) | Norway (63) |
| 1 (1996) | 2 | Norway (52)c | Norway (43)c | |||
| 0 | 2 | — | Former Soviet Union (59) and Thailand (34) | |||
| 1 (1998) | 6 | Somalia (37) | Somalia (22-38) [4 patients]) and Democratic Republic of the Congo (9) | |||
| 1 (1998) | 3 | Somalia (34) | Tanzania (46) and Ethiopia (33) | |||
| 13 | 36 | 3 | 1 (1996) | 2 | Somalia (32) | Somalia (12) |
| 1 (1998) | 2 | Sudan (39) | Angola (23) | |||
| 0 | 2 | — | Somalia (11 and 35) | |||
| 14 | 38 | 3 | 0 | 2 | — | Somalia (18 and 31) |
| 0 | 2 | — | Somalia (29 and 36) | |||
| 1 (1995) | 2 | Somalia (26) | Somalia (37) | |||
| 15 | 24 | 2 | 0 | 2 | — | Somalia (17) and Norway (64) |
| 14 (1994) | 20 | Somalia (21-35 [11 patients]), Ethiopia (31 and 32), and Norway (1) | Somalia (2-48 [6 patients]) | |||
| 16 | 20 | 1 | 0 | 3 | — | Pakistan (21, 25, and 31) |
| 17 | 4 | 0 | 0 | 0 | — | — |
| 18 | 3 | 0 | 0 | 0 | — | — |
| 19 | 3 | 0 | 0 | 0 | — | — |
| 20 | 0 | 0 | 0 | 0 | — | — |
| 21 | 1 | 0 | 0 | 0 | — | — |
a
Cluster size is number of patients with identical isolates.
b
The non-Norwegian patients include first- and second-generation immigrants.
c
Eleven copies of IS6110 were identical to those found in an outbreak strain carrying 11 copies of IS6110 in 16 Norwegians. Ages and age ranges are given in years.