Table 3.

Infectivity rates and median no. of CFU per gram of kidney from animals with positive kidney cultures

Strain Phenotype Infectivity rateaMedian no. of CFU/g of kidney
CFT073 TonB+ 7/95.2 × 103
CFT073-TBTonB 2/100b
CFT073-TB(pYUK1)TonB+ 7/8 1.3 × 104
  • a Number of animals with positive kidney cultures/number of animals inoculated.

  • b P = 0.01 in comparison with CFT073 and CFT073-TB(pYUK1), as determined by the Mann-Whitney test.