Helicobacter pylori infection in obesity and its clinical outcome after bariatric surgery

Table 1 Prevalence of Helicobacter pylori infection in the general population worldwide

	Country	Prevalence (%)
North America	United States and Canada	30.0
	Canada	23.1
South America	Mexico	70-90
	Chile	70-90
	Brazil	82.0
Europe	Poland	84.2
	Albania	70.7
	Estonia	69.0
	Germany	48.8
	Czech Republic	42.1
	Iceland	36.0
	Switzerland	11.9
	Sweden	11.0
Middle East	Egypt	90.0
	Turkey	80.0
Asia	Bangladesh	> 90.0
	India	88.0
	Japan	55.4
	Taiwan	45.1
Africa	Ethiopia	> 95.0
	Nigeria	70-90
Australia		15.4

Table 2 Prevalence of Helicobacter pylori infection in obese and normal weight patients worldwide

	n	% H. pylori + obese (n)	% H. pylori + control (n)	Country	H. pylori detection	Ref.
North America	202	6.9 (101)	4.9 (101)	United States	Histology	[8]
	611	23.7	ND		Histology	[9]
	169	30.1	ND		Histology	[10]
	74	24.0	ND		Urease test	[11]
	87	20.0	ND		Urease test	[12]
	58	12.0	ND		Mixed	[13]
	96	11.0	ND		Mixed	[14]
	2684	61.3 (240)	48.2 (2244)		Serology	[4]
	259	22.4	ND		Serology	[15]
South America	232	5.0	ND	Chile	Histology	[16]
	126	53.2	ND	Brazil	Histology	[17]
	83	50.0 (50)	66.6 (33)	Brazil	Histology	[18]
	42	50.0	ND	Brazil	Urease test	[19]
	533	52.5	ND	Chile	Urease test	[20]
	96	37.5	ND	Brazil	Mixed	[21]
Europe	319	39.0	ND	Switzerland	Urease test	[22]
	69	8.7	ND	Germany	Urease test	[6]
	224	23.0 (42)	77.0 (182)	Greece	Serology + histology	[23]
Middle East	656	7.3	ND	Kuwait	Histology	[24]
	62	85.5	ND	Saudi Arabia	Histology	[7]
	214	57.2 (103)	27.0 (111)	Turkey	Serology	[3]
Asia	152	41.4	ND	Taiwan	Histology	[25]
	156	39.7	ND		Histology	[26]
	1097	43.7 (414)	60.0 (683)		Serology	[27]

ND: Not defined; H. pylori: Helicobacter pylori.