Figure 1Process of tuberculosis (TB) contact investigation in congregate settings. IGRA = interferon-gamma release assay; LTBI = latent TB infection; TST = tuberculin skin test.
Figure 2Process of latent tuberculosis infection (LTBI) diagnosis. IGRA = interferon-gamma release assay; TST = tuberculin skin test.
Figure 3Latent tuberculosis infection rate (LTBI) and tuberculin skin test (TST) conversion rate by congregate setting.
Figure 4Latent tuberculosis infection (LTBI) rate and tuberculin skin test (TST) conversion rate by age.
Table 1Results of contact investigations by congregate settings.
Congregate settings |
Facilities (n) |
Index patients (n) |
Contacts (n) |
New patients detected, n (%) |
LTBI, n (%) |
Education facilities |
Daycare center/kindergarten |
49 |
50 |
1,993 |
0 (0.0) |
394 (19.8) |
Elementary school |
33 |
33 |
1,628 |
1 (0.1) |
215 (13.2) |
Middle school |
93 |
103 |
12,637 |
4 (0.0) |
910 (7.2) |
High school |
300 |
419 |
79,369 |
105 (0.1) |
6,055 (7.6) |
University |
290 |
377 |
29,384 |
82 (0.3) |
2,121 (7.2) |
Other schools |
10 |
11 |
803 |
2 (0.2) |
82 (10.2) |
Subtotal |
769 |
993 |
125,814 |
194 (0.2) |
9,777 (7.8) |
Military or police unit |
127 |
145 |
9,335 |
30 (0.3) |
1,085 (11.6) |
Social welfare facilities/correctional facilities |
201 |
292 |
10,522 |
26 (0.2) |
2,499 (23.8) |
Workplaces |
46 |
60 |
1,552 |
7 (0.5) |
366 (23.6) |
Others |
51 |
57 |
1,943 |
2 (0.1) |
559 (28.8) |
Total |
1,200 |
1,547 |
149,166 |
259 (0.2) |
14,286 (9.6) |
Table 2Latent tuberculosis infection (LTBI) by age.
Age (y) |
No. of LTBI (%) |
LTBI rate |
0∼4 |
197 (1.4) |
18.1 |
5∼9 |
175 (1.2) |
15.4 |
10∼14 |
547 (3.8) |
6.5 |
15∼19 |
4,849 (33.9) |
5.7 |
20∼24 |
1,892 (13.2) |
7.7 |
25∼29 |
562 (3.9) |
8.6 |
30∼34 |
581 (4.1) |
16.4 |
≥35 |
5,483 (38.4) |
26.2 |
Total |
14,286 (100) |
9.6 |
Table 3Treatment agreement rate and completion rate by congregate settings.
Congregate settings |
Treatment agreement rate (%) |
Treatment completion ratea (%) |
Education facilities |
Daycare center/kindergarten |
83.8 |
94.1 |
Elementary school |
88.1 |
76.5 |
Middle school |
81.0 |
90.0 |
High school |
80.8 |
92.2 |
University |
66.2 |
90.4 |
Other schools |
72.5 |
100.0 |
Subtotal |
78.0 |
91.2 |
Military or police unit |
83.9 |
88.6 |
Social welfare facilities/correctional facilities |
93.2 |
91.1 |
Workplaces |
63.0 |
100.0 |
Others |
64.6 |
42.9 |
Total |
79.7 |
90.3 |