Engineers at the University of California San Diego have developed a miniature device that's sensitive enough to feel the forces generated by swimming bacteria and hear the beating of heart muscle cells.
Optics & Photonics
May 15, 2017
0
1367
Discovered in 1982, Helicobacter pylori (H. pylori) is a disease-causing bacterium that survives in our stomachs despite the harsh acidic conditions. It is estimated that one in two people have got it, though most won't ever ...
Cell & Microbiology
Aug 14, 2015
4
993
In a scientific breakthrough, Monash University researchers have discovered a revolutionary "U-turn" in the evolution of antibiotic resistance, challenging the widely accepted notion that traits once developed are irreversible.
Evolution
Jan 5, 2024
0
119
Scientists are continually unearthing new facts about Homo sapiens from the mummified remains of Ötzi, the Copper Age man, who was discovered in a glacier in 1991. Five years ago, after Ötzi's genome was completely deciphered, ...
Archaeology
Jan 7, 2016
1
25
(PhysOrg.com) -- Helicobacter pylori can cause stomach ulcers and cancers. Over half of the world’s inhabitants carrys this bacterium, but different variants are present on different continents. Up to now, biologists have ...
Jan 23, 2009
1
0
A research team led by scientists at the Chinese University of Hong Kong is releasing study results this week showing how a bacterium, Helicobacter pylori, that causes more than half of peptic ulcers worldwide and that has ...
Biochemistry
Dec 7, 2011
1
0
Scientists have uncovered a novel antibiotic-free approach that could help prevent and treat one of the most widespread bacterial pathogens, using nanocapsules made of natural ingredients.
Bio & Medicine
Oct 17, 2019
0
95
Neutron analysis at the Department of Energy's Oak Ridge National Laboratory is helping researchers better understand a key enzyme found in a bacterium known to cause stomach cancer.
Biochemistry
Feb 1, 2017
0
529
Researchers report they have figured out how the cancer-causing bacterium Helicobacter pylori attacks a cell's energy infrastructure, sparking a series of events in the cell that ultimately lead it to self-destruct.
Cell & Microbiology
Nov 1, 2011
1
0
(Phys.org)—Experiments at the U.S. Department of Energy's (DOE) SLAC National Accelerator Laboratory have revealed a potential new way to attack common stomach bacteria that cause ulcers and significantly increase the odds ...
Biochemistry
Dec 10, 2012
1
0
Helicobacter pylori (pronounced /ˌhɛlɪkɵˈbæktər pɪˈlɔəraɪ/) is a Gram-negative, microaerophilic bacterium that inhabits various areas of the stomach and duodenum. It causes a chronic low-level inflammation of the stomach lining and is strongly linked to the development of duodenal and gastric ulcers and stomach cancer. Over 80% of individuals infected with the bacterium are asymptomatic.
The bacterium was initially named Campylobacter pyloridis, then renamed C. pylori to correct a Latin grammar error. When 16S rRNA gene sequencing and other research showed in 1989 that the bacterium did not belong in the genus Campylobacter, it was placed in its own genus, Helicobacter. The genus derived from the Ancient Greek hělix/έλιξ "spiral" or "coil". The specific epithet pylōri means "of the pylorus" or pyloric valve (the circular opening leading from the stomach into the duodenum), from the Ancient Greek word πυλωρός, which means gatekeeper.
More than 50% of the world's population harbour H. pylori in their upper gastrointestinal tract. Infection is more prevalent in developing countries, although incidence is decreasing in western countries. The route of transmission is unknown, although individuals become infected in childhood. H. pylori's helix shape (from which the generic name is derived) is thought to have evolved to penetrate the mucoid lining of the stomach.
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