Table 1. DNase I protection assay of non-culturable Y. pestis cells from the autoclaved tap water microcosm compared to actively growing Y. pestis.

SAMPLE	Average Ct (SD)
Non-culturable Y. pestis
Heat-killed (no DNase I)	20.32 (0.03)
Heat-killed (24-h DNase I)	26.14 (0.29)
Not heat-killed (no DNase I)	19.98 (0.3)
Not heat-killed (24-h DNase I)	21.7 (0.26)
Actively growing Y. pestis
Heat-killed (no DNase I)	26.97 (0.17)
Heat-killed (24-h DNase I)	30.62 (0.4)
Not heat-killed (no DNase I)	24.56 (0.4)
Not heat-killed (24-h DNase I)	26.07 (0.14)