Table 1—

Results ofMycobacterium tuberculosis-specific interferon-γ release assay (ELISPOT) among tuberculin skin test (TST)-positive contacts

BCGTST induration size mmDegree of exposurePositive TST results nELISPOT results n
NegativePositive
No6Occasional11
13Occasional22
14Occasional11
16Occasional11
17Occasional11
21Occasional11
27Occasional11
30Occasional33
Total1165
10Close33
15Close11
22Close33
 Total734
Yes7Occasional11
8Occasional33
9Occasional11
10Occasional55
11Occasional44
12Occasional11
13Occasional11
14Occasional11
15Occasional33
16Occasional11
17Occasional11
18Occasional22
19Occasional11
22Occasional11
42Occasional11
 Total27252
10Close11
13Close22
14Close11
17Close11
22Close11
24Close11
25Close11
27Close11
 Total972
  • ELISPOT: enzyme-linked immunospot; BCG: bacille Calmette–Guérin.