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Bacterium in Biological News

Mosquito parasite may help fight dengue fever

... Ae. aegypti with a strain of the Wolbachia bacterium and shortened the mosquitoes' lifespan. But before insects carrying the bacterium can be released into the environment, the O'Neill ... virus. McGraw and O'Neill had to find out how the bacterium affects the mosquito's physiology and behaviour ...

Research could lead to new non-antibiotic drugs to counter hospital infections

... amount of the mineral phosphate can turn a common bacterium into a killer, according to research to be ... Department of Surgery. "It's almost as if the bacterium sense when to strike," said John Alverdy, ... surgery or have reduced immunity. If the bacterium attacks critical body organs such as the lungs, ...

Gutsy germs succumb to baby broccoli

... sulforaphane did not cure infection by the bacterium Helicobacter pylori ( H. pylori ). They do not ... in inflammation of the primary target of this bacterium the body of the stomach in treated mice but not ... of the world's population this corkscrew-shaped bacterium has long been associated with stomach ulcers, ...

Researchers examine bacterial rice diseases, search for genetic solutions

... is bacterial blight of rice, which is caused by a bacterium called Xanthomonas oryzae pathovar oryzae , and ... leaf streak of rice caused by the closely related bacterium Xanthomonas oryzae pathovar oryzicola . ... system of the plant, which typically allows the bacterium to spread faster and cause more damage than is ...

When intestinal bacteria go surfing

... The bacterium Escherichia coli is part of the healthy human ... EspFU, are brought into the host cell from the bacterium for pedestal formation. Following this, the host cell presents Tir on its surface; the bacterium recognises "its" molecule Tir and adheres to the ...

Monash scientists debug superbug

... , unravelled ways to genetically modify the bacterium Clostridium difficile and solved the mystery ... suspected toxic proteins was essential for the bacterium to cause severe disease. "Contrary to ... the 'good' bacteria in the gut, allowing a 'bad' bacterium to grow in the colon, where it causes a chronic ...

Genetic adaptations key to microbe's survival in challenging environment

... The genome of a marine bacterium living 2,500 meters below the ocean's surface is ... of Science. The research focused on the bacterium Nautilia profundicola , a microbe that survives ... profundicola . That gene, called rgy, allows the bacterium to manufacture a protein called reverse gyrase ...

Comparative genomics reveals molecular evolution of Q fever pathogen

... strains of C. burnetii , an intracellular bacterium that can cause acute and chronic Q fever in ... in the world since inhalation of a single bacterium alone is sufficient to kick-start infection. ... as cattle, goats, and sheep. The C. burnetii bacterium targets macrophages white blood cells in the ...

Single gene lets bacteria jump from host to host

... with the help of a squid that uses a luminescent bacterium to create a predator-fooling light organ and a ... night near the ocean surface, one strain of the bacterium forms a light organ that mimics moonlight and ... In the pinecone fish, another strain of the bacterium colonizes a light organ within the animal's jaw ...

UD research study to shed light on emerging seaborne pathogen

... that lives in seawater and is related to the bacterium that causes cholera, is expanding its range and ... the environment?" "We want to determine if the bacterium has acquired new genes to make it more virulent, ... acquired large pieces of DNA, which may give the bacterium a major advantage from an evolutionary point of ...

The medium is the message: Manipulating salmonella in spaceflight curtails infectiousness

... pathogen of choice, is a rod-shaped, motile bacterium and occasional unwelcome visitor to the human ... If a rolling stone gathers no moss, a bacterium like S. typhimurium appears to gather virulence ... also in vivo in an infected individual when the bacterium makes contact with an intestinal host cell and ...

Caltech researchers get first 3-D glimpse of bacterial cell-wall architecture

... together by peptides, which wrap around the bacterium like a belt around a person, according to ... to grow and remodel the bag to fit it as the bacterium itself grows. "If the bug can't make this bag," ... the sacculus--we're closer to understanding how a bacterium could direct its own growth, and how drugs that ...

Scientists discover bacteria that can cause bone infections

... species," said Dr Bang. "We called the bacterium Mycobacterium arosiense. The name comes from ... the city of Aarhus in Denmark, which is where the bacterium was first found. We showed the position of the new bacterium on the Mycobacterium family tree by sequencing ...

Wielding microbe against microbe, beetle defends its food source

... pine beetle harnesses a second microorganism a bacterium known as an actinomycete to protect its fungus from the mite's competing one. What's more, the bacterium does so by wielding an antibiotic that is brand ... United States and Mexico relies so heavily on a bacterium seems incredible, but that's precisely the case ...

TB bacterium uses its sugar coat to sweeten its chances of living in lungs

... with a sugar called mannose, which makes the bacterium attractive to cells in the lungs that are looking ... bacteria. People who are infected can harbor the bacterium without symptoms for decades, but an estimated ... active disease is another indication that the TB bacterium has evolved in relative isolation in different ...

UCR graduate student discovers, names bacterium linked to psyllid yellows

... and expects to graduate next year, discovered the bacterium serendipitously through her research on the ... of biological classification in which the bacterium is nested; psyllaurous means psyllid yellows in ... of an infected tomato or potato plant with this bacterium is yellowing of the foliage," said Hansen, whose ...

Can microorganisms be a solution to the world's energy problems?

... that one species of bacteria, the human gut bacterium E. coli , has become the workhorse of the ... do not grow in isolation. In other words, no bacterium is an island. The very biodiversity that fills ... genome was released in 1995. This photosynthetic bacterium features membranes with high lipid (i.e., oil) ...

From foe to friend: Researchers use salmonella as a way to administer vaccines in the body

... that they have been able to use live salmonella bacterium as the containment/delivery method for an ... "We try to genetically modify the salmonella bacterium to eliminate its harmful effects -- the diarrhea, ... the genetically modified Salmonella enterica bacterium colonizes the lymph tissues of the host and ...

Footrot vaccine closer than ever

... 8 years of collaborative work on the pathogenic bacterium which causes footrot, Dichelobacter nodosus. We ... exposed on the surface of the causative bacterium and therefore more likely to elicit an immune ... identified 90 proteins in the footrot bacterium that are potential antigens for a new ...

Thinking ahead: Bacteria anticipate coming changes in their environment

... the behavior of Escherichia coli, the ubiquitous bacterium that travels back and forth between the ... and oxygen changes that occur when the bacterium enters the gut? The conventional answer is that ... animal's mouth. Could this sudden warmth cue the bacterium to prepare itself for the subsequent lack of ...

New pathogen from pigs' stomach ulcers

... Scientists have isolated a new bacterium in pigs' stomachs thanks to a pioneering ... Systematic and Evolutionary Microbiology. The bacterium that commonly causes stomach ulcers in humans is ... Extensive research has been carried out on this bacterium and the two scientists who discovered it were ...

University of Arizona scientist shares in discovery of microbe filaments' power

... on the surface of Neisseria gonorrhoeae, the bacterium that causes the infectious disease gonorrhea. The ... 50 to 100 picoNewton range. This force allows the bacterium to move an object 10,000 times its own body ... bundle are roughly 10 times higher, allowing the bacterium to move objects 100,000 times its body weight. ...

Scientists discover how TB 'develops invincibility' against only available treatment

... TB. They have identified how the killer bacterium makes itself immune to a key component of the ... They isolated the molecular weapons of the bacterium and are assessing ways to make the bacterium impotent. Now, in new research published in ...

Viruses evolve to play by host rules, according to University of Pennsylvania researchers

... preferences of its host. The host bacterium is exerting a strong evolutionary pressure on the ... the particular codon choices preferred by the bacterium they infect. The study found that each bacterium has a preferred way of spelling its genes. And ...

Nanotube-producing bacteria show manufacturing promise

... postdoctoral researcher Bongyoung Yoo, found the bacterium Shewanella facilitates the formation of ... arsenic contamination using the metal-reducing bacterium Shewanella. Myung, who specializes in ... is not yet fully understood, the Shewanella bacterium secretes polysacarides that seem to produce the ...

Decoy makes sitting duck of superbugs

... that by taking a short stretch of DNA from a bacterium and delivering it with an existing antibiotic ... they can develop effective new drugs against any bacterium within a couple of years and at a fraction of the ... The Procarta scientists found that the bacterium Streptomyces produces a particularly high yield ...

C. difficile spores spread superbug

... factor in the development of C. difficile infection for some time. The bacterium can live inside the gut of healthy human beings, existing as part of a ... disrupted. Because C. difficile is resistant to many antibiotics, the bacterium was able to exploit the opportunity and proliferate where other gut ...

Scientists track chemical changes in cells as they endure extreme conditions

... the chemical changes in Desulfovibrio vulgaris, which is a single-cell bacterium that normally can only exist in an oxygen-free environment. They exposed ... pathways. Scientists have also teased out the chemical changes in the bacterium by studying different cells at various stages in a population of cells. ...

Scientists sequence genome of the N2-fixing, soil-living bacterium Azotobacter vinelandii

... A. vinelandii has one of the highest respiratory rates of any known bacterium and has the capacity to maintain low levels of cytoplasmic oxygen through ... in this study provide new prospects for the wider application of this bacterium as a factory for the production and characterization of oxygen-sensitive ...

The evolution of gene regulation

... even in microorganisms. It is known, for example, that the intestinal bacterium Escherichia coli in the digestive tract of young mammals can break down lactose, the sugar abundant in mother's milk. To do this, the bacterium produces the enzyme lactase but only if lactose is actually present. Most ...

Pliable proteins keep photosynthesis on the light path

... of photosynthesis, the team used a hardy, well-studied, photosynthetic bacterium called Rhodobacter sphaeroides . An organism similar to this purple bacterium was likely one of the earliest photosynthetic bacteria to evolve. The ...

Sugar on bacteria surface serves as base for a web of resistance

... sugar, a polysaccharide called Psl, is anchored on the surface of the bacterium as a helix, providing a structure that encourages cell-to-cell ... human immune response, as well as antibiotic drugs. In the case of the bacterium being studied, Pseudomonas aeruginosa, the results of biofilm development ...

Mass Biologic Labs/UMass Med School and Medarex license C. difficile monoclonal antibody to Merck

... effects of toxin A and toxin B, respectively, the toxins produced by the bacterium C. difficile and which are associated with a serious and sometimes ... difficile infection (CDI) C. difficile is a spore-forming bacterium that is common in the environment and can colonize the gastrointestinal ...

New technique used to profile anthrax genome

... a new approach, known as RNA-Seq, to profile the gene expression of the bacterium that causes anthrax, Bacillus anthracis. Their study, published March 20, ... any bacterial transcriptomethe complete collection of mRNAs produced by a bacterium as it expresses different geneshas been comprehensively defined, and ...

University researchers to develop coatings that kill superbugs

... said: "In simple terms, we want to know what is special about that one bacterium in a million that is resistant to an antimicrobial polymer. Which genes are switched on or off and which proteins are produced to help the bacterium survive? "From this knowledge we can stay one step ahead of evolution ...

Microscope reveals how bacteria 'breathe' toxic metals

... and their colleagues were able to glimpse how the Shewanella oneidensis bacterium breaks down metal to chemically extract oxygen. The study, published ... and his colleagues used an atomic force microscope (AFM) to test how the bacterium responded to the metallic mineral hematite. An AFM works somewhat like ...

Long-sought protein structure may help reveal how 'gene switch' works

... GAITHERSBURG, Md.The bacterium behind one of mankind's deadliest scourges, tuberculosis, is helping ... the task proved to be extremely difficult. Using CRP from the bacterium Escherichia coli, researchers were able to crystallize the protein in its ...

Bacteria are models of efficiency

... The bacterium Escherichia coli, one of the best-studied single-celled organisms around, is a master of industrial efficiency. This bacterium can be thought of as a factory with just one product: itself. It exists to ...

Researchers push nature beyond its limits to create higher-density biofuels

... nature beyond its limits by genetically modifying Escherichia coli , a bacterium often associated with food poisoning, to produce unusually long-chain ... of amino acids in E. coli and changed the metabolic pathway of the bacterium by inserting two specially coded genes. One gene, from a cheese-making ...

Red alert! How disease disables tomato plant's 'intruder alarm'

... How a bacterium overcomes a tomato plant's defences and causes disease, by sneakily ... have been taken out, the plant's defences are 'offline' and the bacterium is able to spread rapidly, feeding on the plant without encountering any ...
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