Role of ZnuABC and ZinT in Escherichia coliO157:H7 zinc acquisition and interaction with epithelial cells

BMC Microbiology

Table 4 Competition assays in CaCo-2 cells

Strain A (relevant genotype)	Strain B (relevant genotype)	Median CI^a	P^b
Wild type	znuA::cam*	6.833	0.034
Wild type	zinT::kan*	0.980	NS
Wild type	zinT:: kan znuA:: cam*	3.899	0.004
zinT::kan	zinT:: kan znuA:: cam*	2.788	< 0.001
znuA::cam	zinT:: kan znuA:: cam*	0.697	0.004

a. Competitive index = output (Strain A/Strain B)/inoculum (Strain A/Strain B).
b. Statistical differences between output and inocula (the P-values) were determined by the Students t test. NS, not significant.
* Antibiotic used for strains selection

ISSN: 1471-2180