Review article: 'true' re-infection of Helicobacter pylori after successful eradication--worldwide annual rates, risk factors and clinical implications.

Abstract:

BACKGROUND:The incidence of 'true' re-infection with Helicobacter pylori after successful eradication remains uncertain. AIM:To determine the worldwide rates, risk factors and clinical implications of 'true' re-infection of Helicobacter pylori. 'True' re-infection of H. pylori is defined as the situation where tests for H. pylori infection, which were negative for 12 months after eradication, become positive again at a later stage. RESULTS:Thirty six studies were identified through a literature search to be able to produce annual rates of 'true' re-infection, and data from 33 original articles were considered reliable and adequate in the further review. Generally, the reported rates varied from 0% to 23.4% in adults and from 1.9% to 9.6% in children. Most studies from developed countries reported rates of less than 1%, whereas relatively higher rates were reported in most of the developing countries. Small sample sizes included in the studies appeared to be associated with increased re-infection rates. Interfamilial transmission is the major cause of re-infection, although iatrogenic re-infection through contaminated endoscopic equipment has been reported. CONCLUSION:Helicobacter pylori re-infection is not a concern in a clinical setting, especially in the developed world; however, caution must be exercised in most developing countries.

journal_name

Aliment Pharmacol Ther

authors

Zhang YY,Xia HH,Zhuang ZH,Zhong J

doi

10.1111/j.1365-2036.2008.03873.x

subject

Has Abstract

pub_date

2009-01-01 00:00:00

pages

145-60

issue

2

eissn

0269-2813

issn

1365-2036

pii

APT3873

journal_volume

29

pub_type

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