Table 3.

The influence of pPCP on the subcutaneous 50% lethal dose of Lcr+ cells of Y. pseudotuberculosisin mice

StrainpPCP50% lethal doseRa
8506.7 × 101
85/1+ (pVK1)b 8.2 × 102 12.2
85/2+ (pVK2)2.1 × 103 31.3
86107.5 × 105
861/1+ (pVK1)6.2 × 106 8.3
861/2+ (pVK2)4.8 × 106 6.4
  • a R, ratio of 50% lethal dose of the parent to that of the isogenic derivative transformed with pPCP.

  • b +, carriage of pPCP.