TABLE 3.

Frequency of recombination between different H. pylori and C. jejuni strains

H. pylori strain (Strr Kanr)	Treatment with DNase I (200 μg/ml)a	No. of C. jejuni transconjugants (Sptr/Strr) (CFU)
		1543	81-176	ST3046
P1ΔureB	−	3.6 × 10−7	6.8 × 10−8	2.8 × 10−7
P1ΔureB	+	4.2 × 10−8	1.2 × 10−8	3.3 × 10−8
26695ΔureB	−	2.3 × 10−7	8.4 × 10−8	7.9 × 10−8
26695ΔureB	+	2.1 × 10−8	2.2 × 10−8	6.4 × 10−9
1061ΔureB	−	1.9 × 10−7	5.7 × 10−8	9.5 × 10−8
1061ΔureB	+	3.1 × 10−8	7.9 × 10−9	1.2 × 10−8

^a+, treated; −, untreated.