Reinfection After Eradication of Helicobacter Pylori Infection

Study Overview
=================
Brief Summary
-----------------
Helicobacter pylori is closely related with gastritis, peptic ulcer, gastric cancer and gastric MALT lymphoma, and it may participate in a variety of parenteral diseases. Infection rates of Helicobacter pylori is still high, so effectively eradication is necessary. At present, the eradication therapy has achieved very good curative effect. However, relapse after eradication is unoptimistic. This study has made an analysis for reinfection after eradication of Helicobacter pylori Infection include the retrospective and prospective studies, aims to explore the epidemiological data and related risk factors of Hp reinfection in China.

Detailed Description
-----------------
In the retrospective study,we choose the people received regular eradication therapy, successfully eradicated helicobacter pylori more than six months, but 4 to 8 weeks after drug withdrawal ,the detection result of helicobacter pylori were negative to ensure that the results of the study is the reinfection, not residual. Even more noteworthy is during the treatment and detection again, the patients must not received any eradication therapy of Hp. What's more , before the detection, they also has not used antibiotics, bismuth agent and the traditional Chinese medicine with antibacterial effect in 1 monthor and has not used H2RA and PPI in 2 weeks to prevent affecting the accuracy of the results. At the same time, we also investigated the patient's general situation, conomic conditions, living conditions, personal health and lifestyle to explore related risk factors of Hp reinfection in China. In the prospective study, we detected Hp by C-UBT after regular eradication therapy of Hp for 4 weeks, 8 weeks and 6 months to prospect the reinfection of Hp.It also can make up the defects of retrospective study.

Official Title
-----------------
Reinfection After Eradication of Helicobacter Pylori Infection in Adult :A National Multicentre Study

Conditions
-----------------
Bacterial Infection Due to Helicobacter Pylori (H. Pylori), Eradication Therapy of Helicobacter Pylori, Detection of Helicobacter Pylori

Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: -1、Retrospective study： Received regular eradication therapy, 4 to 8 weeks after drug withdrawal , detected of helicobacter pylori and the results were negative Eradication program and original disease is unlimited Without any eradication therapyof Hp during the treatment and detection again before the detection has not used antibiotics, bismuth agent and the traditional Chinese medicine with antibacterial effect in 1 monthor and has not used H2RA and PPI in 2 weeks. 2、Prospective study Infected with H. pylori that detected by C-UBT With out alimentary tract hemorrhage,ulceration and complications of eradication Eradication program and original disease is unlimited Exclusion Criteria: Pregnancy or breast-feeding women With the major disease which would influence the research such as liver disease, heart disease, kidney disease, malignant tumor and alcohol poisoning Participated in other drug research in the past three months The patient can't express himself correctly such as mental illness and severe neurosis and can't cooperation this test

Ages Eligible for Study
-----------------
Minimum Age: 18 Years
Maximum Age: 70 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
No

Study Plan
=================
How is the study designed?
-----------------

Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Retrospective study<br>People who has successfully eradicated helicobacter pylori more than six months detected helicobacter pylori by the C-urea breath test in order to evaluate the reinfection. | |
| Prospective study<br>People who has infected helicobacter pylori received regular eradication therapy after the 4 weeks, 8 weeks and 6 months detected helicobacter pylori by the C-urea breath test in order to prospect the reinfection . | |

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Helicobacter Pylori Infection | Retrospective study | six months | 
| Helicobacter Pylori Infection | Prospective study | After regular eradication therapy of Hp for 4 weeks, 8 weeks and 6 months | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
Reinfection, Eradication therapy, C-urea breath test, Helicobacter Pylori