Table 3. Resistance of 122 H.pylori strains to digestion by 14 REs, by geographic origin of the strain.

H.pylori methyltransferase	RE examined	Percent of strains resistant to the specified RE
		Asia-Pacific (n = 42)	North America (n = 22)	South America (n = 27)	Europe (n = 28)	Africa (n = 3)	Total (n = 122)
M.HpyAI	NlaIII	100	100	100	100	100	100
M.HpyAIII	MboI	95	100	100	96	100	98
M.HpyAII	MboII	55	36	63	57	33	53
M.HpyAIV	HinfI	64	45	44	61	33	55
M.HpyVIII	HpaII	76	68	67	54	67	67
M.HpyAVIB	DdeI	60	36	22	57	0	45
M.Hpy178VI	FokI	2	5	0	0	0	2
M.Hpy178VI	TaqI	90	91	93	71	67	86
M.HpyV	HaeIII	43	32	48	29	0	38
M.HpyCH4III	HpyCH4III	50	73	30	50	100	51
M.HpyCH4IV	HpyCHIV	76	77	81	61	67	74
M.HpyCH4V	HpyCH4V	64	82	70	75	67	71
M.Hpy188I	Hpy188I	21	23	22	14	67	21
M.Hpy99I	Hpy99I	57	73	67	57	67	62
Number of resistances	Mean ± SD	8.4 ± 1.9	8.3 ± 2.1	8.0 ± 1.6	8.0 ± 1.8	8.0 ± 1.0	8.2 ± 1.9
	Range	3–13	4–12	4–11	4–12	7–9	3–13