|
Characteristics
|
HCW 1
|
HCW 2
|
HCW 3
|
HCW 4
|
HCW 5
|
|---|
|
Mantoux (mm) median pre/post exposure
|
Previously TST positive
|
12 mm and vesicular
|
16 mm and vesicular
|
Previous tuberculosis
|
15 mm and vesicular
|
|
TST positive
|
Not tested
|
Yes
|
Yes
|
Not tested
|
Yes
|
|
Exposure time (≤ 8 h/> 8 h)
|
≤ 8 h
|
≤ 8 h
|
≤ 8 h
|
≤ 8 h
|
> 8 h
|
- Table 3 depicts the characteristics of the 5 HCWs with a positive T-SPOT.TB. Results in absolute numbers from post-exposure screening of 155 health care workers (HCWs) and 48 healthy controls, 2005–2007. During childhood all participants were either BCG-immunized or had a naturally positive tuberculin skin test (TST). The definition of a positive TST (Mantoux) was an increase of ≥ 10 mm, or of ≥ 15 mm if previous TST status was unknown (in concordance with the national guidelines). The exposed HCWs were also tested with T-SPOT.TB, an interferon gamma release assay (IGRA).
