scholarly journals KHẢO SÁT MỐI LIÊN QUAN GIỮA GENOTYPE VÀ TÌNH TRẠNG KHÁNG CLARITHROMYCIN CỦA HELICOBACTER PYLORI Ở BỆNH NHÂN VIÊM LOÉT DẠ DÀY TÁ TRÀNG

2021 ◽  
Vol 507 (2) ◽  
Author(s):  
Đào Thanh ◽  
Trần Đỗ Hùng ◽  
Trần Thị Như Lê ◽  
Nguyễn Văn Lâm ◽  
Tạ Văn Trầm ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Realtime Pcr ◽  
Urease Test

Đặt vấn đề: Tình trạng kháng clarithromycin đang gia tăng trên toàn thế giới và là nguyên nhân phổ biến nhất dẫn đến thất bại trong điều trị Helicobacter pylori. Mục tiêu nghiên cứu: xác định tỷ lệ kháng clarithromycin của Helicobacter pylori ở bệnh nhân viêm, loét dày - tá tràng và mối liên quan giữa genotype và tình trạng kháng clarithromycin của Helicobacter pylori. Đối tượng và phương pháp nghiên cứu: Nghiên cứu cắt ngang được thực hiện trên các bệnh nhân viêm loét dạ dày tá tràng tại tỉnh Tiền Giang 5/2020 đến tháng 5/2021. Những bệnh nhân được phỏng vấn, khám lâm sàng, thu thập mẫu niêm mạc dạ dày tá tràng. Bệnh nhân được xác định nhiễm Helicobacter pylori khi có ít nhất 2 xét nghiệm nhuộm gram, urease test dương hoặc xét nghiệm nuôi cấy định danh dương tính với Helicobacter pylori. Helicobacter pylori được xác định kháng clarithromycin bằng kỹ thuật E-test và xác định genotype bằng kỹ thuật Realtime-PCR. Kết quả: Tỷ lệ đề kháng clarithromycin của vi khuẩn Helicobacter pylori trên bệnh nhân tham gia nghiên cứu là 77,3%. Nhóm bệnh nhân nhiễm chủng Helicobacter pylori mang genotype cagA(+) có tỷ lệ đề kháng kháng sinh cao hơn nhóm bệnh nhân nhiễm chủng Helicobacter pylori mang genotype cagA(-), với OR (KTC95%): 11,25 (1,11-114,37), p=0,024. Kết luận: bệnh nhân dương tính với Helicobacter pylori chủng cagA(+) nên được quan tâm đặc biệt do có khả năng đề kháng kháng sinh clarithromycin tăng cao.

scholarly journals PREVALENCE OF INFECTION WITH CAGA-POSITIVE HELICOBACTER PYLORI STRAINS AMONG CHILDREN AND ADOLESCENTS IN SOUTHERN BRAZIL

2014 ◽  
Vol 51 (3) ◽  
pp. 180-185 ◽  
Author(s):  
Juliana Ghisleni de OLIVEIRA ◽  
Cristina Helena Targa FERREIRA ◽  
Anna Carolina Saraiva CAMERIN ◽  
Cláudia Augustin ROTA ◽  
Luíse MEURER ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Children And Adolescents ◽  
Polymerase Chain Reaction Method ◽  
Southern Brazil ◽  
Worldwide Distribution ◽  
Clinical Presentations ◽  
Urease Test ◽  
Polymerase Chain ◽  
H Pylori ◽  
Low Prevalence

Context Helicobacter pylori (H. pylori) has a worldwide distribution, but the prevalence of infection, virulence factors, and clinical presentation vary widely according to the studied population. In Brazil, a continental country composed of several ethnicities and cultural habits, the behavior of infection also appears to vary, as many other studies have shown. Objectives Describe the prevalence of infection with cagA-positive H. pylori strains in a group of children and adolescents who underwent esophagogastroduodenoscopy in Porto Alegre, Rio Grande do Sul. Methods Fifty-four gastric biopsy specimens of children and adolescents with H. pylori infection demonstrated by histology, urease test and molecular analysis were tested for the presence of cagA positive H. pylori strains by the polymerase chain reaction method. Results he prevalence of cagA-positive H. pylori was 29.6% (95% confidence interval, 18 to 43.6%). There were no statistically significant differences in clinical or demographic characteristics or in the endoscopic and histological features of patients infected with cagA-positive strains as compared with those infected by cagA-negative strains. Conclusions he study showed a low prevalence of infection with cagA-positive H. pylori strains among children and adolescents who underwent EGD in southern Brazil, in comparison to studies conducted with children from other regions of Brazil. There was no association between the presence of cagA-positive strains and more severe clinical presentations in the studied sample.

Frequency of rdx A Deletion Mutation Conferring Metronidazole Resistance in Helicobacter pylori

2020 ◽  
Vol 29 (3) ◽  
pp. 59-64
Author(s):  
Hanaa M. El Maghraby ◽  
Samar Mohaseb
Keyword(s):  
Helicobacter Pylori ◽  
Epigastric Pain ◽  
Deletion Mutation ◽  
Rapid Urease Test ◽  
Rrna Gene ◽  
University Hospitals ◽  
Metronidazole Resistance ◽  
Urease Test ◽  
Gastric Biopsies ◽  
H Pylori

Background: Metronidazole is one of the antimicrobial drugs that can be used in combination with other drugs for eradication of Helicobacter pylori (H. pylori).Unfortunately, metronidazole resistance in H. plori is an increasing health problem which may be attributed to inactivation of many genes as rdx A gene. Objective: To determine the frequency of rdx A deletion mutation in H. pylori detected in infected patients attending at the Gastroenterology Unit, Zagazig University Hospitals. Methodology: Two gastric biopsies were taken from each enrolled patient by endoscopy. H.pylori detection was done by rapid urease test and polymerase chain reaction (PCR) amplification of 16S rRNA gene. Deletion mutation in rdx A gene was detected by conventional PCR. Results: Out of 134 doubled gastric biopsies obtained from 134 patients, 52.2% were positive for H. pylori. Epigastric pain, vomiting and gastritis were significantly associated with detection of H. pylori infection (p˂ 0.05). Deletion mutation of rdx A gene was detected in 28.6% of H. pylori positive specimens obtained from infected patients. Conclusion: Deletion mutation of rdx A gene is a frequent determinant of rdx A inactivation conferring metronidazole resistance among H. pylori.

scholarly journals Therapeutic efficacy of ranitidine bismuth citrate with clarithromycin for seven days in the eradication of Helicobacter pylori in Brazilian peptic ulcer patients

2003 ◽  
Vol 121 (1) ◽  
pp. 15-18 ◽  
Author(s):  
Jaime Natan Eisig ◽  
Fernando Marcuz Silva ◽  
Cláudio Hashimoto ◽  
Ethel Zimberg Chehter ◽  
Antonio Atilio Laudanna
Keyword(s):  
Helicobacter Pylori ◽  
Peptic Ulcer ◽  
Histological Examination ◽  
Tertiary Care ◽  
Therapeutic Regimen ◽  
Care Hospital ◽  
Peptic Ulcers ◽  
Cross Sectional ◽  
Bismuth Citrate ◽  
Urease Test

CONTEXT: The curative treatment of peptic ulcer is made available nowadays through the eradication of the bacterium Helicobacter pylori, which is associated with it, but the best therapeutic regimen is yet to be determined. OBJECTIVE: To assess the efficacy of a therapeutic regimen with 400 mg ranitidine bismuth citrate associated with 500 mg clarithromycin given twice a day for seven days in a cohort of Brazilian patients with peptic ulcer. TYPE OF STUDY: Cross-sectional study. SETTING: Tertiary-care hospital. PATIENTS: One hundred and twenty nine outpatients, with active or healed peptic ulcers infected by Helicobacter pylori, diagnosed via endoscopy with confirmation via the urease test and histological examination, who had never undergone a regimen for the eradication of the bacterium. PROCEDURE: Administration of 400 mg ranitidine-bismuth and 500 mg clarithromycin twice a day, for seven days. MAIN MEASUREMENTS: Efficacy of the treatment, with a check on the cure done via another endoscopy eight weeks after drug administration. The eradication of the bacterium was determined via the urease test and histological examination. Patients who were negative for both were considered to be cured. RESULTS: Eight patients failed to complete the study. The eradication rate according to intention to treat was 81% (104/129) and per protocol was 86% (104/121). CONCLUSION: The bismuth ranitidine compound associated with clarithromycin used for one week was shown to be a simple, effective and well-tolerated therapeutic regimen for the eradication of Helicobacter pylori.

scholarly journals Incidence of Gastric Metaplasia and Helicobacter pylori Infection in Duodenal Bulb – With Specific Reference to Patients With Duodenal Ulcers

1999 ◽  
Vol 6 (1) ◽  
pp. 17-23 ◽  
Author(s):  
Minoru Kawaguchi ◽  
Toshihiko Saito
Keyword(s):  
Helicobacter Pylori ◽  
Duodenal Bulb ◽  
Mucosal Injury ◽  
Transitional Zone ◽  
Specific Reference ◽  
Rapid Urease Test ◽  
Duodenal Ulcers ◽  
Gastric Metaplasia ◽  
Urease Test ◽  
H Pylori

We determined the incidence of gastric metaplasia in the duodenal bulb of duodenal ulcer patients and the Helicobacter pylori (H. pylori) infection rate at sites with gastric metaplasia. Biopsy of the duodenal bulb showed the presence of gastric metaplasia in 61 of 86 patients (71%) overall and in 18 of 47 patients (38.3%) who had gastrectomy at an early gastric cancer. The histological diagnosis of H. pylori infection showed good agreement (83.3%) with the result of the rapid urease test, indicating that H. pylori occurs in regions with gastric metaplasia. This finding suggests that H. pylori infects gastric metaplasia in the duodenal bulb, causing mucosal injury, which is then transformed into duodenal ulcers. The exact mechanism by which gastric metaplasia is caused is unknown, but it is believed to occur in the transitional zone in the duodenal mucosa.

scholarly journals Helicobacter pylori as a risk factor for gastric cancer: the evidence and primary prevention strategy

2019 ◽  
Vol 47 (6) ◽  
pp. 535-547 ◽  
Author(s):  
I. N. Voynovan ◽  
Yu. V. Embutnieks ◽  
D. V. Mareeva ◽  
S. V. Kolbasnikov ◽  
D. S. Bordin
Keyword(s):  
Gastric Cancer ◽  
Helicobacter Pylori ◽  
Risk Factor ◽  
Primary Prevention ◽  
Russian Federation ◽  
Diagnostic Methods ◽  
Rapid Urease Test ◽  
First Line ◽  
Urease Test ◽  
The Russian Federation

Russia is a country with a high prevalence of Helicobacter pylori (HP) infection, a high incidence of gastric cancer, and its late diagnosis. HР infection has been recognized as the leading manageable risk factor for gastric cancer. Accurate diagnostic tests must be used to identify and control the effectiveness of HP eradication, and effective schemes must be implemented for HP eradication. The aim of this article was to analyze the latest consensus documents, systematic reviews and meta-analyzes that reflected the role of HP as a risk factor for the development of gastric cancer, as well as measures for the risk reduction. We describe in detail the diagnostic methods for HP infection, provide data on their use in the Russian Federation, and analyze the efficacy of eradication regimens. In all HPinfected individuals, HP leads to chronic inflammation in the gastric mucosa and launches a precancerous cascade (Correa's cascade). The risk of gastric cancer increases with severe atrophy, intestinal metaplasia and dysplasia. Primary prevention of gastric cancer is most effective if the eradication is performed before atrophic gastritis develops. The available consensus documents underline the importance of HP infection identification by accurate diagnostics at this stage of chronic gastritis. In Russia, the primary HP diagnosis is based on histology (37.7%), rapid urease test (29.2%), and serology (29.7%). HP stool antigen test (31.3%), 13C-urea breath test (23.4%) and the histological method (23.3%) are most often used to control eradication. Currently, the first line of eradication therapy is recommended as triple therapy with clarithromycin prescribed for 14 days. It is recommended to use double dose of proton pump inhibitors and bismuth to increase the effectiveness of this scheme. A 14-days triple regimen enhanced by bismuth has been recommended as the first-line therapy in the Russian Federation.

scholarly journals Association of gastric infection and periodontal disease through Helicobacter pylori as a common denominator: A systematic review and meta-analysi

2021 ◽  
Author(s):  
Nansi López-Valverde ◽  
◽  
Antonio López-Valverde ◽  
Ana Suarez ◽  
Bruno Macedo de Sousa ◽  
...  
Keyword(s):  
Systematic Review ◽  
Helicobacter Pylori ◽  
Clinical Studies ◽  
Periodontal Diseases ◽  
Meta Analysis ◽  
Helicobacter Pylori Infection ◽  
Enzyme Linked Immunosorbent Assay ◽  
Rapid Urease Test ◽  
Common Denominator ◽  
Urease Test

Review question / Objective: Is gastric helicobacter pylori infection related to periodontal diseases? Condition being studied: Therefore, the aim of this systematic review and meta-analysis was to identify and analyze clinical studies to determine the direct correlation between Helicobacter Pylori gastric infection andPeriodontal Disease. Study designs to be included: Clinical studies that provided data on Helicobacter Pylori infection in both the stomach and oral cavity, confirmed by polymerase chain reaction (PCR), rapid urease test (RUT) or enzyme-linked immunosorbent assay (ELISA). Clinical studies that associated PD with Helicobacter Pylori. The diagnosis of PD was confirmed ac-cording to the diagnostic criteria in periodontology.

scholarly journals Can probiotics improve efficiency and safety profile of triple Helicobacter pylori eradication therapy? A prospective randomized study

2016 ◽  
Vol 73 (11) ◽  
pp. 1044-1049 ◽  
Author(s):  
Sasa Grgov ◽  
Tomislav Tasic ◽  
Biljana Radovanovic-Dinic ◽  
Daniela Benedeto-Stojanov
Keyword(s):  
Helicobacter Pylori ◽  
Randomized Study ◽  
Eradication Therapy ◽  
Saccharomyces Boulardii ◽  
Rapid Urease Test ◽  
Group I ◽  
Urease Test ◽  
Probiotic Strains ◽  
The Difference ◽  
H Pylori

Background/Aim. Some studies suggest the benefit of applying different probiotic strains in combination with antibiotics in the eradication of Helicobacter pylori (H. pylori) infection. The aim of this study was to evaluate the effect of co-administration of multiple probiotic strains with triple H. pylori eradication therapy. Methods. This prospective study included 167 patients with dyspeptic symptoms and chronic gastritis who were diagnosed with H. pylori infection and randomized into two groups. The group I of 77 patients underwent triple eradication therapy, for 7 days, with lansoprazole, 2 ? 30 mg half an hour before the meal, amoxicillin 2 ? 1.000 mg per 12 hours and clarithromycin 2 ? 500 mg per 12 hours. After the 7th day of the therapy, lansoprazole continued at a dose of 30 mg for half an hour before breakfast for 4 weeks. The group II of 90 patients received the same treatment as the patients of the group I, with the addition of the probiotic cultures in the form of a capsule comprising Lactobacillus Rosell-52, Lactobacillus Rosell-11, Bifidobacterium Rosell-1755 and Saccharomyces boulardii, since the beginning of eradication for 4 weeks. Eradication of H. pylori infection control was performed 8 weeks after the therapy by rapid urease test and histopathologic evaluation of endoscopic biopsies or by stool antigen test for H. pylori. Results. Eradication of H. pylori infection was achieved in 93.3% of the patients who received probiotics with eradication therapy and in 81.8% of patients who were only on eradication therapy without probiotics. The difference in eradication success was statistically significant, (p < 0.05). The incidence of adverse effects of eradication therapy was higher in the group of patients who were not on probiotic (28.6%) than in the group that received probiotic (17.7%), but the difference was not statistically significant. Conclusion. Multiple probiotic strains addition to triple eradication therapy of H. pylori achieves a significantly better eradication success, with fewer side effects of antibiotics.

scholarly journals Antibiotic resistance of Helicobacter pylori in the European part of the Russian Federation: first results

2020 ◽  
Vol 92 (8) ◽  
pp. 24-28
Author(s):  
I. V. Maev ◽  
D. N. Andreev ◽  
V. M. Govorun ◽  
E. N. Ilina ◽  
Yu. A. Kucheryavyy ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Antibiotic Resistance ◽  
Russian Federation ◽  
European Part ◽  
Diffusion Method ◽  
Rapid Urease Test ◽  
Urease Test ◽  
First Results ◽  
The Russian Federation ◽  
H Pylori

Aim. Determine the primary antibiotic resistance of Helicobacter pylori (H. pylori) strains isolated from patients living in the European part of the Russian Federation. Materials and methods. As part of a clinical laboratory study, from 2015 to 2018, 27 gastrobiopsy samples obtained from H. pylori-infected patients were analyzed. H. pylori infection was verified using a rapid urease test or a 13C-urea breath test. The values of the minimum inhibitory concentration (MIC) of antibiotics were determined by the diffusion method using E-test strips (BioMerieux, France) according to the recommendations of the manufacturer. The sensitivity of the isolates was determined for 6 antibacterial drugs (amoxicillin, clarithromycin, metronidazole, levofloxacin, tetracycline, rifampicin). Results. According to the data obtained, resistance to amoxicillin was 0%, clarithromycin 11.1%, metronidazole 59.3%, levofloxacin 3.7%, tetracycline 0%, and rifampicin 14.8%. Dual resistance to clarithromycin and metronidazole was recorded in two isolates (7.4%). Conclusion. Thus, the first results of the evaluation of H. pylori antibiotic resistance in the European part of the Russian Federation indicate a low resistance of the microorganism to clarithromycin and quite high to metronidazole.

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