Treatment with the caspase 1-specific inhibitor Y-VAD decreased IL-1β secretion for both strains from 4629.3 pg/mL (without Y-VAD) to 1294.3 pg/mL (with Y-VAD; Figure 2A) during the infection with the NADL cp strain and from 252.9 pg/mL (without Y-VAD) to 63.5 pg/mL (with Y-VAD) with the NY-1 ncp strain (Figure 2B). This evidence concerns the gene CASP1 and infection.