Strain of Lactococcus lactis General quantity of cells in Goryaev (Thoma) chamber CFU/ml % viable cells in population General quantity of viable cells Optical density % viable cells, but not forming colonies 12 days 12 weeks 12 days 12 weeks 12 days 12 weeks 12 days 12 weeks MSU type A 2.4 ± 0.3×109 3.4 ± 0.4×109 99.9 78.6 0.7 0.5 99.8 99.9          ________________ _____________ ------------- --------------- 5 ± 0.6×106 3.1 ± 0.3×103 2.4 ± 0.3×109 2.7 ± 0.6×109 MSU type B 1.5 ± 0.2×108 5.2 ± 0.6×109 100 84.9 0.5 1.6 92.9 99.9 ______________ ______________ -------------- ---------------- 1.1 ± 0.1×107 1.3 ± 0.1×105 1.5 ± 0.1×108 4.4 ± 0.5×109 729 type A 2.1 ± 0.2×109 2.6 ± 0.3×109 98.2 71.6 0.6 0.5 99.9 99.9 _____________ ______________ --------------- ------------------ 1.9 ± 0.2×106 1.1 ± 0.1×104 2.1 ± 0.2×109 2.0 ± 2.2×109 729 type B 6.8 ± 7.3×107 6.0 ± 0.7×107 100 94.5 0.2 0.1 98.9 99.9 _____________ ______________ ---------------- ----------------- 3.6 ± 0.4×104 4.5 ± 0.6×103 6.8 ± 0.7×107 5.7 ± 0.1×107 F-116 type A 2.5±0.3×109 3.0±0,3×109 98.9 99.9 0.8 0.7 99.5 99.9 _____________ ______________ -------------- ---------------- 1.3 ± 0.2×107 1.1 ± 0.1×104 2.5 ± 0.3×109 3.0 ± 0.3×109 F-116 type B 6.9 ± 0.8×107 7.2 ± 0.8×107 97.9 95.6 0.1 0.1 93.6 99.9 ____________ ______________ ---------------- ----------------- 4.3 ± 0.5×106 5.4 ± 0.6×104 6.7 ± 0.7×107 6.7 ± 0.8×107

Table 2: Characteristics of viability parameters of L. lactis populations in 12 days and 12 weeks of incubation.