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Tag: "bacteria" at biology news

A new understanding of how cells defend themselves against bacterial pore-forming toxins

...w cells mount a survival response when attacked by bacteria and parasites and also gives insight into the more...lop drugs to fight antibiotic-resistant strains of bacteria that use these toxins as part of their hijacking strategy. ...

Researchers reveal mystery of bacterial magnetism

...icrobiology's most fascinating mysteries--why some bacteria are naturally magnetic. Their description of how being magnetic "helps" the bacteria is reported in the August 2006 issue of the Biophysical Journal. Magnetic bacteria are found in a v...

Search on for treatment of slow-healing wounds

...ll be distributed over four years. Biofilms are bacteria that grab onto a surface, build a colony and then ...s cuts. Previous center research has shown that bacteria in biofilms activate sets of genes that are dormant in free-floating bacteria. With their new geneti...

Different strategies underlie the ecology of microbial invasions

...on a much smaller ecological scale, the ability of bacteria to spread their viruses to competing bacteria. In ... have compared two different general ways in which bacteria compete with one another, and they have found that each strategy seems to be particularly effective ...

Most widely used organic pesticide requires help to kill

...adison reports that without the help of the native bacteria that colonize the insect gut, Bt is unable to perf...emonstrates that Bt requires the presence of other bacteria to exert its lethal influence. Virtually all animals, including humans, depend on the interplay of...

Scientists find a key to immune system's ability to remember

...alog and recall long past encounters with viruses, bacteria and other pathogens is why we only get the measles or chicken pox once, and is why exposure to deactivated virus particles in vaccines confers protection from disease. But how that memory system works -- how it acts at the finest level of detail to...

UGA scientists unravel 'molecular inch-worm' structure of walking-pneumonia bacterium

...--only a fraction the size of other health-related bacteria such as E. coli," said microbiologist Duncan Kraus...s to study how organelles in these incredibly tiny bacteria grow and what their functions are. From a medical standpoint, however, they point the way to potenti...

Jefferson researchers uncover new way nature turns genes on and off

...rference" mechanism. "Such mechanisms are known in bacteria and yeast, but not much is known in higher organisms," he explains. In the fruit fly, HOX gene activity is maintained by genes and proteins in the Trithorax group (TrxG). These proteins are thought to act through so-called maintenance elements, one...

Mayo Clinic collaboration mining of ancient herbal text leads to potential new anti-bacterial drug

...at extracts from the Atun tree effectively control bacteria that can cause diarrhea, as claimed by naturalist Georg Eberhard Rumpf, circa 1650. He documented his traditional healing methods in the book Ambonese Herbal. The Mayo Clinic-led team's report appears in the Dec. 23 edition of The British Medical Jo...

Better sludge through metagenomics

...annually. Many treatment plants employ specialized bacteria to remove the nutrient phosphorus, in an effort to...ich EBPR sludge. So it got us thinking that these bacteria must be living in natural habitats and that they have become opportunistically adapted to this manma...

Resistant bacteria increasing source of muscle infection

An antibiotic-resistant bacteria called methicillin-resistant Staphylococcus aureus... myositis and pyomyositis, the cause was a form of bacteria ?either Staphylococcus aureus or Streptococcus pyogenes. The infections occurred between 2000 and 20...

Cell wall of pneumonia bacteria can cause brain and heart damage

...dels how cell walls from certain pneumonia-causing bacteria can cause fatal heart damage; researchers have als...pieces of cell walls from Streptococcus pneumoniae bacteria "hijack" a protein on the lining of the blood vessel wall and use it to slip out of the bloodstream ...

P(acman) takes a bite out of deciphering Drosophila DNA

...is present in only one or few copies. However, the bacteria can be induced to produce many copies of the DNA when needed. Koen then integrated a technique called “recombineering?into the strategy, which facilitates the scientist to clone large chunks of DNA and subsequently allows them to make specific mut...

New finding points way to foiling anthrax's tricks

...ley, chemists have discovered a trick that anthrax bacteria use to make an end run around the body's defenses,...ncovered the trick while studying how these deadly bacteria steal iron from their human hosts to grow and reproduce. "Humans make a protein called siderocali...

Solved: The mystery of flesh-eating bacteria's relentless attack

...discovered one reason why so-called "flesh-eating" bacteria are so hard to stop. Emanuel Hanski, a microbio...ections, in which white blood cells swarm invading bacteria to clear them from the body, few white blood cells appeared at the M14 infection site. A similar phe...

With record resolution and sensitivity, tool images how life organizes in a cell membrane

...y response, adhering to other cells and countering bacteria and toxins. ''Many proteins live in three dimensions for part of their life and in two dimensions for part of their life,'' Boxer said. ''They go back and forth. When you're in two dimensions, your chance of bumping into something else is a lot high...

Gut reaction: Researchers define the colon's genome

...s that humans need to digest food, suggesting that bacteria in the colon co-evolved with their human host, to ...tract has the most abundant, diverse population of bacteria in the human body," remarks lead author Steven Gill, a molecular biologist formerly at TIGR and now ...

Scientists use an 'ice lolly' to find polar bacteria in their own backyard

To study the bacteria which survive in extreme cold, scientists no longe...ity, Canada, have developed a technique to isolate bacteria which have properties to interact with, and modify, ice. This technique involved the formation of an...

MRSA vaccine shows promise in mouse study

...injected with a dose of a laboratory strain of the bacteria calculated to kill 50 percent of the mice, were still alive one week later. When they vaccinated the mice using the combined vaccine, however, all of the mice survived. Although unvaccinated mice had clear evidence of kidney infections, the "bact...

Bacteria could make new library of cancer drugs that are too complex to create artificially

...University of Warwick are examining a way of using bacteria to manufacture a new suite of potential anti-cancer drugs that are difficult to create synthetically on a lab bench. The bacterium Streptomyces coelicolor naturally produce antibiotics called prodiginines. This group of antibiotics has stimulated...

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