TABLE 2

Enumeration of M. smegmatis bacteria in different milk samples before and after DSI process at 105°C for 3 s and calculated minimum log10 reduction

MatrixStrainEnumeration before DSI (CFU/ml)aEnumeration after DSI (CFU/ml)bMinimum log10 reductionLog10 SDc
UHT skimmed milkDSM 437561.9 × 107<17.190.34
DSM 434693.9 × 107<17.580.06
ATCC 7000843.9 × 107<17.590.07
UHT whole milkDSM 437565.8 × 105<15.740.18
DSM 434693.2 × 107<17.500.04
ATCC 7000843.4 × 107<17.530.02
Raw milkDSM 437562.8 × 106<16.440.10
DSM 434699.5 × 107<17.970.09
ATCC 7000845.0 × 107<17.700.03
  • a Average of the enumerations before DSI of 3 trials per matrix-strain combination.

  • b Average of the enumerations after DSI of 3 trials per matrix-strain combination.

  • c Standard deviation calculated on 3 trials per matrix-strain combination.