Virulence of water-induced coccoid Helicobacter pylori and its experimental infection in mice

Table 2 Adherence of H.pylori to Hep-2 cells

	Adherence rate (%)a			Adherence indexb(Bacteria numbers per cell)
	F44	F45	F49	F44	F45	F49
Spiral form	70.0 ± 5.3	73.0 ± 5.1	72.6 ± 4.5	2.6 ± 0.4	3.1 ± 0.5	2.9 ± 0.4
Coccoid form	30.2 ± 3.5	35.7 ± 4.1	31.4 ± 4.0	0.86 ± 0.3	0.91 ± 0.3	0.88 ± 0.4
t value	12.3	11.2	12.8	7.2	7.8	7.4
P	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01	< 0.01

^aAdherence rate = amount of cells adhered by bacteria/ 100 × 100%;

^bAdherence index = total amount of bacteria adher-ing to 100 cells/100; Five groups of 100 cells on the same cov-erslip were counted for the bacteria adhered. Data are presented as mean ± SD. t and P values were obtained using Student t test.