Table 2.

Frequency of colonization among NS:Hr/ICR hairless mice challenged with type I or II strains of H. pyloria

StrainPheno- typeDose (1st/2nd) (CFU)No. colonized (n = 5/group)
Week 1Week 2Week 3Week 4
ControlNoninfected0000
NSP394I2.4 × 107/2.8 × 107 1000
NSP333II3.3 × 107/3.4 × 107 2000
NSP335I1.8 × 107/2.1 × 107 5555
NSP305I1.7 × 107/1.9 × 107 5555
NSP355II1.4 × 107/2.1 × 107 5555
  • a Mice were challenged with 107 CFU at 8 weeks of age and examined at weeks 1, 2, 3, and 4 postchallenge.