Active clinical trials for "Helicobacter Infections"

Comparison of the eradications rates of sequential therapy versus concomitant therapy of treatment of Helicobacter pylori infection in Korea. single center, randomized trial (pantoprazole 40 mg + amoxicillin 1.0g + clarithromycin 500 mg + metronidazole 500 mg) twice for 10 days (pantoprazole 40 mg + amoxicillin 1.0g + clarithromycin 500 mg + metronidazole 500 mg) twice for 14 days (pantoprazole 40 mg + amoxicillin 1.0g) twice for 5 days and subsequent pantoprazole 40mg + clarithromycin 500 mg + metronidazole 500 mg) twice for 5 days (pantoprazole 40 mg + amoxicillin 1.0g) twice for 7 days and subsequent pantoprazole 40mg + clarithromycin 500 mg + metronidazole 500 mg) twice for 7 days 1st endpoint : Helicobacter pylori eradication rates (intention to treatment, per-protocol) 2nd endpoint : adverse event(nausea, vomiting, dizziness, bitter sense) drug compliance

To compare the diagnostic accuracy of the 13C-Urea breath test between using the citric acid as test meal and controlled group by endoscopic biopsy methods(histology, CLOtest and H. pylori culture). To compare the delta value of 13CO2 results between before and after ingestion of citric acid as test meal.

Traditionally, H pylori infection has been treated with conventional triple therapy. This includes amoxicillin, clarithromycin and a proton pump inhibitor all given daily for 10-14 days. In Europe, the guidelines now advocate treatment of H pylori with sequential therapy which is 5 days of amoxicillin therapy with proton pump inhibitor followed by 5 days of clarithromycin, metronidazole, and proton pump inhibitor with better response rates. We hypothesize that H. pylori resistance pattern and treatment response rates observed in Europe will not be predictive of resistance patterns and response rates in the United States.

Clarithromycin-resistant H. pylori is the main cause of H. pylori eradication failure. Tailored therapy on the basis of detection of a clarithromycin resistance mutation by PCR has been studied recently, however, there have been few studies comparing treatment regimen in patient with clarithromycin-resistant H. pylori. We used sequencing-based clarithromycin resistance mutation and aimed to compare PAM (proton pump inhibitor, amoxicilline, metronidazole) regimen and PBMT (proton pump inhibitor, bismuth, metronidazole, tetracyclin) regimen in patient with clarithromycin-resistant H. pylori.

Introduction: Helicobacter pylori has been linked to a variety of gastric and extra gastric diseases. Chronic infection with H. pylori causes histologically evident gastritis in all colonized individuals and is the predominant risk factor for gastric and duodenal ulcers as well as gastric adenocarcinoma. However, increasingly robust experimental and epidemiological evidence suggests that H. pylori may at the same time be beneficial to its carriers, as it efficiently prevents allergic disorders and chronic inflammatory conditions . Inflammatory bowel disease (IBD) is characterized by chronic, nonspecific intestinal inflammation with an unexplained pathology and an alternating relapsing and remitting clinical progression. IBD is divided into two subtypes: ulcerative colitis (UC) and Crohn's disease (CD). Most studies in the IBD field attribute its etiology to the complex interactions among immune dysfunction, genetic susceptibility of the host, and environmental risk factors. Since the twenty-first century, improving hygienic conditions and socioeconomic status have reduced the H. pylori infection rate and this trend has concurrently been accompanied by an increased IBD incidence in most countries Numerous studies have reported a lower H. pylori infection rate in patients with CD and/or UC than in non-IBD control individuals. although a small number of studies showed no significant association .Recently, emerging epidemiologic studies and animal experiments revealed an inverse correlation between H. pylori infection and IBD onset, suggesting that H. pylori colonization exerts a special protective effect on autoimmune diseases observation Cross sectional study will be conducted at assuit university hospitals on all patients with inflammatory disease to detect the prevalence of helicobacter pylori among them .Then the examined patients will be divided in to two group receiving the same medication group A : inflammatory bowel disease patient with H.PYLORI group B: inflammatory bowel disease Patient without H.PYLORI longitudinal study will be conducted to both group to study the clinical outcomes in both group .

This study is performed to measure wether Helicobacter Pylori has an effect on the incidence and course of acute alcohol induced pancreatitis

Helicobacter pylori (Hp) is a major cause of chronic-active gastritis and primary duodenal ulcers, and is strongly linked to gastric cancer. Most Hp infections worldwide are acquired in childhood. Why some individuals develop symptomatic disease is unclear and, until recently, no studies critically evaluated the role of pediatric Hp strains and/or host factors in disease outcomes. Over the past 5 years of National Institutes of Health (NIH) funding, 486 children from Atlanta, Cleveland, and Miami were enrolled; 184 (38%) were Hp-infected. Race (African American) and younger age, in conjunction with Hp strains expressing cagA and vacAs1B, were shown to be risk factors for both esophageal and gastric disease, suggesting a different disease paradigm from Hp-infected adults. Using the updated Sydney system, the investigators demonstrated a histopathologic spectrum in children, which included novel observations of atrophic gastritis with intestinal metaplasia. Overall hypothesis for competitive renewal: disease manifestations in Hp-infected children are influenced by specific host factors (i.e., race, immune phenotype), environmental exposures, and specific virulence factors of infecting Hp strains. Specific aims: Using well defined cases and controls, further characterize specific host factors and environmental exposures contributing to symptomatic childhood infection emphasizing targeted enrollment in specific age, gender and demographic strata to facilitate detection of significant differences not attained previously and follow-up of 2 established specific cohorts to ascertain immune response natural history. Utilize gene-array technology for the whole Hp genome assessment and bacterial gene expression of specific virulence determinants associated with pediatric Hp strains. Further characterize the host immunologic and mucosal response in Hp-infected children. Hp-infected symptomatic endoscopy cases at the investigators' established 3 clinical centers of high, moderate and low Hp prevalence will be compared with age-matched Hp-infected asymptomatic and uninfected symptomatic controls. Two geographically and demographically distinct centers have been added to provide additional geographic and subject representativeness to the patient cohort. The updated Sydney system will be employed to assess gastric histopathology severity and phenotype in newly enrolled cases in specific age, gender and demographic strata and follow-up of the two "novel" cohorts established in the past 5 years: a) atrophic gastritis; and b) esophageal and gastric disease groups enabling a comprehensive, multivariate evaluation of the natural history of Hp-infected children in two distinct disease paradigms. Using molecular methods (multiplex [MP]-PCR, RT-PCR) and a micro ELISPOT assay on peripheral blood mononuclear cells (PBMCS), Th1, Th2, Th3 or balanced Th1/Th2 response will be determined to further characterize the Hp-infected child's immune response phenotype. The investigators propose to further their previous work with critically lacking studies from a multivariate approach, leading to a better understanding of the gastroduodenal disease sequelae and overall pathobiology of Hp infection in humans.

To investigate the role of chronic infection as a risk factor for vascular disease in a study of Native Americans. The primary focus is on the two most common agents Chlamydia pneumoniae and cytomegalovirus with a secondary emphasis on Helicobacter pylori.

Nowadays, the gold standard examinations for diagnosing H. pylori infection are histopathology and culture examination. However, those examinations take long preparation so they are not suitable to be applied in daily practice. In progress, another examination is being developed to detect urease enzyme from tissue biopsy. It is relatively faster in diagnosing H. Pylori infection. Some commercial urease tests which are available in Indonesia are Helicotec® and Pronto Dry®. This study aims to determine the effectivity of Helicotec® in diagnosing H. pylori infection. It is expected to be scientific evidence that can be used as the basis daily routine of urease test in diagnosing H. Pylori infection.

Helicobacter pylori can lead to a variety of digestive system diseases.The eradication of Helicobacter pylori plays an importment role for the treatment of gastrointestinal ulcer and prevention of gastric cancer .Compared with other countries and regions in the world, the infection rate of Helicobacter pylori in China can reach more than 50%. The non-standard diagnosis and treatment of Helicobacter pylori greatly reduces its eradication rate and increases its drug resistance.Therefore, it is very important to strengthen the standardization of diagnosis and treatment to improve the eradication rate. The purpose of this study is to investigate the diagnosis and treatment status of Helicobacter pylori among gastroenterologists in general hospitals in Shandong Province.It can help us to understand the actual situation of diagnosis and treatment of Helicobacter pylori in hospitals at all levels, and to provide targeted diagnosis and treatment training for doctors.