{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,1]],"date-time":"2026-09-01T07:43:42Z","timestamp":1788248622443,"version":"build-2803163510"},"reference-count":66,"publisher":"Public Library of Science (PLoS)","issue":"8","license":[{"start":{"date-parts":[[2024,8,22]],"date-time":"2024-08-22T00:00:00Z","timestamp":1724284800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":["www.plosone.org"],"crossmark-restriction":false},"short-container-title":["PLoS ONE"],"abstract":"<jats:sec id=\"sec001\">\n<jats:title>Background<\/jats:title>\n<jats:p><jats:italic>Helicobacter pylori<\/jats:italic> (<jats:italic>H<\/jats:italic>. <jats:italic>pylori)<\/jats:italic> is frequently associated with non-cardia type gastric cancer, and it is designated as a group I carcinogen. This study aimed to systematically review and meta-analyze the evidence on the prevalence of CagA status in people with gastric disorders in the Indo-Pacific region, and to examine the association of CagA positive in the risk of gastric disorders. This study focused on the Indo-Pacific region owing to the high disability adjusted life-years related to these disorders, the accessibility of efficient treatments for this common bacterial infection, and the varying standard of care for these disorders, particularly among the elderly population in the region.<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec002\">\n<jats:title>Methods<\/jats:title>\n<jats:p>Relevant studies were identified in the health-related electronic databases including PubMed, Ovid, Medline, Ovid Embase, Index Medicus, and Google Scholar that were published in English between 1 January 2000, and 18 November 2023. For pooled prevalence, meta-analysis of proportional studies was done, after Freeman-Tukey double arcsine transformation of data. A random-effect model was used to compute the pooled odds ratio (OR) and 95% confidence interval (CI) to investigate the relationship between CagA positivity and gastric disorders.<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec003\">\n<jats:title>Results<\/jats:title>\n<jats:p>Twenty-four studies from eight Indo-Pacific countries (Bhutan, India, Indonesia, Malaysia, Myanmar, Singapore, Thailand, Vietnam) were included. Overall pooled prevalence of CagA positivity in <jats:italic>H<\/jats:italic>. <jats:italic>pylori<\/jats:italic>-infected gastric disorders was 83% (95%CI = 73\u201391%). Following stratification, the pooled prevalence of CagA positivity was 78% (95%CI = 67\u201390%) in <jats:italic>H<\/jats:italic>. <jats:italic>pylori<\/jats:italic>-infected gastritis, 86% (95%CI = 73\u201396%) in peptic ulcer disease, and 83% (95%CI = 51\u2013100%) in gastric cancer. Geographic locations encountered variations in CagA prevalence. There was a greater risk of developing gastric cancer in those with CagA positivity compared with gastritis (OR = 2.53,95%CI = 1.15\u20135.55).<\/jats:p>\n<\/jats:sec>\n<jats:sec id=\"sec004\">\n<jats:title>Conclusion<\/jats:title>\n<jats:p>Findings suggest that the distribution of CagA in <jats:italic>H<\/jats:italic>. <jats:italic>pylori<\/jats:italic>-infected gastric disorders varies among different type of gastric disorders in the study countries, and CagA may play a role in the development of gastric cancer. It is important to provide a high standard of care for the management of gastric diseases, particularly in a region where the prevalence of these disorders is high. Better strategies for effective treatment for high-risk groups are required for health programs to revisit this often-neglected infectious disease.<\/jats:p>\n<\/jats:sec>","DOI":"10.1371\/journal.pone.0307172","type":"journal-article","created":{"date-parts":[[2024,8,22]],"date-time":"2024-08-22T19:06:02Z","timestamp":1724353562000},"page":"e0307172","update-policy":"https:\/\/doi.org\/10.1371\/journal.pone.corrections_policy","source":"Crossref","is-referenced-by-count":7,"title":["CagA toxin and risk of Helicobacter pylori-infected gastric phenotype: A meta-analysis of observational studies"],"prefix":"10.1371","volume":"19","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3425-7149","authenticated-orcid":true,"given":"Cho","family":"Naing","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4789-258X","authenticated-orcid":true,"given":"Htar Htar","family":"Aung","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5428-7639","authenticated-orcid":true,"given":"Saint Nway","family":"Aye","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yong","family":"Poovorawan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Maxine A.","family":"Whittaker","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"340","published-online":{"date-parts":[[2024,8,22]]},"reference":[{"key":"pone.0307172.ref001","doi-asserted-by":"crossref","first-page":"1521","DOI":"10.3748\/wjg.v23.i9.1521","article-title":"Host pathogen interactions in Helicobacter pylori related gastric cancer","volume":"23","author":"M Chmiela","year":"2017","journal-title":"World J Gastroenterol"},{"key":"pone.0307172.ref002","doi-asserted-by":"crossref","first-page":"1311","DOI":"10.1016\/S0140-6736(84)91816-6","article-title":"Unidentified curved bacilli in the stomach of patients with gastritis and peptic ulceration","volume":"1","author":"BJ Marshall","year":"1984","journal-title":"Lancet"},{"key":"pone.0307172.ref003","unstructured":"IARC. 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