FIG. 1.

Growth of BCG lux in whole blood from infants pre- and post-BCG vaccination and from unvaccinated infant controls (a), in vaccinated infants according to age at the time of the second blood sampling (b), and in adult controls over the entire study period (c). Three groups of individuals were studied: infants tested prevaccination (n = 33) (○) and again 3 to 6 months postvaccination (n = 33) (•), unvaccinated control infants (n = 4) (×) tested at time of postvaccination assessment of the vaccinated infants, and adult controls (n = 6) tested at time points T₁ (▴) and T₂ (▾). Triplicate whole-blood samples were infected with BCG lux. Growth of BCG lux was measured at 96 h and expressed as a GR of RLU of BCG lux at 96 h to RLU of BCG lux in inoculum.