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Table 1 Estimated storage time in days during desiccation on two matrices to achieve target CFU of 1000 or 1

From: Desiccation induces viable but Non-Culturable cells in Sinorhizobium meliloti 1021

  Matrix*
  Nitrocellulose Ottawa Sand Alfalfa seed
Initial reduction (IR) 41.6 ± 7.5 33.0 ± 12.8 (6.2 ± 2.2) × 103
Target CFU (Nf) 1 1000 1 1000 1 1000
Initial CFU (N0§)
   1 × 107 128 ± 2 60 ± 2 134 ± 5 66 ± 5 78 ± 1 10 ± 1
   2 × 109 181 ± 2 113 ± 2 187 ± 5 118 ± 5 131 ± 1 62 ± 1
  1. (*) Error represent the Standard Error of the Mean with n = 6
  2. (†) IR = Initial Reduction (Nt0-5 = N0/Nt = 5)
  3. (‡) Nf = Target CFU. Complete loss (< 1 CFU), French Canadian Standard = 1000 CFU (Smith 1992)
  4. (§) N0 = Initial CFU