Acute infection may appear as an acute gastritis with abdominal pain (stomach ache) or nausea. However, individuals infected with H. pylori have a 10% to 20% lifetime risk of developing peptic ulcers. Up to 90% of people infected with H. pylori never experience symptoms or complications. In recent decades, however, the prevalence of H. pylori colonization of the gastrointestinal tract has declined in many countries. In 2015, it was estimated that over 50% of the world's population had H. pylori in their upper gastrointestinal tracts with this infection (or colonization) being more common in developing countries. Other studies suggest that non-pathogenic strains of H. pylori may beneficially normalize stomach acid secretion, and regulate appetite. by influencing the type of bacteria that colonize the gastrointestinal tract. Some studies suggest that H. pylori plays an important role in the natural stomach ecology, e.g. Many investigators have suggested that H. pylori causes or prevents a wide range of other diseases, but many of these relationships remain controversial. The infection is also associated with the development of certain cancers. H. pylori infection usually has no symptoms but sometimes causes gastritis (stomach inflammation) or ulcers of the stomach or first part of the small intestine. H. pylori has been associated with cancer of the mucosa-associated lymphoid tissue in the stomach, esophagus, colon, rectum, or tissues around the eye (termed extranodal marginal zone B-cell lymphoma of the cited organ), and of lymphoid tissue in the stomach (termed diffuse large B-cell lymphoma). The bacterium was first identified in 1982 by the Australian doctors Barry Marshall and Robin Warren. Its helical shape (from which the genus name, helicobacter, derives) is thought to have evolved in order to penetrate the mucoid lining of the stomach and thereby establish infection. Helicobacter pylori, previously known as Campylobacter pylori, is a gram-negative, microaerophilic, spiral (helical) bacterium usually found in the stomach. Proton pump inhibitor, clarithromycin, amoxicillin, metronidazole Urea breath test, fecal antigen assay, tissue biopsy Helicobacter pylori spread by oral–oral and fecal oral routes Hematemesis, Melena, abdominal pain, nausea These examples are programmatically compiled from various online sources to illustrate current usage of the word 'helo.' Any opinions expressed in the examples do not represent those of Merriam-Webster or its editors. 2018 This helo can also carry fire retardant to slow down the fire’s spread. Joe Pappalardo, Popular Mechanics, 10 Sep. 2018 These units are not just aiming at Russian helos and warplanes anymore. Eric Adams, WIRED, 5 July 2019 These new helos will take on the mission to tackle these threats. 2020 The helicopter also shows off its quiet mode, deactivating the rear propeller and flying as a conventional helo. Alex Hollings, Popular Mechanics, 20 June 2021 Because of its additional, night-flying capability, the helo will likely need some bright lighting. 2021 So the Army looked for a helo that could fight back, a chopper that was purpose-built for an air assault role. Kyle Mizokami, Popular Mechanics, An aircrew on an MH-60 Jayhawk helo, hoisted and transported the hunting party, 6 adults and 1 teen, to awaiting EMS in Nome. Recent Examples on the Web As the attacker, Russia’s helicopters will be put in more vulnerable situations than Ukraine’s, as the helos are sent to areas where the enemy is expected to be dug in and waiting for them.
0 Comments
Leave a Reply. |