Tag: "colonization" at biology news

Inflammation may cause preterm labor and fetal deaths

... TLR4 mice. The researchers wrote, F. nucleatum colonization in the mouse placenta was accompanied by inflammation, similar to intrauterine infection in humans, suggesting placental inflammatory response as an important factor in the pathogenesis of bacterial-inducted preterm birth. The researchers found th...

Smithsonian Fragmentation Project threatened by Amazon Colonization Plan

...esearch efforts in the Amazon, is imperiled by new colonization proposed by the Brazilian federal agency SUFRAMA, ...ge expanse of central Amazonia, plans to establish colonization projects both inside the study area and across the region. Altogether, many thousands of people coul...

Humboldt squid on the move

... (less than eight degrees Centigrade). Thus, their colonization of Central California waters is not simply a response to a localizedwarming of the ocean. Zeidberg and Robison suggest that Humboldt squid populations may be growing and expanding northward due to a decrease in the number of predators and competit...

Gut check: Tracking the ecosystem within us

... helps broaden the definition of healthy microbial colonization in a baby. Another intriguing observation, Palmer noted, was a tendency for sudden shifts in the composition of the infants' intestinal microbial communities over time as different species of bacteria ebbed and flowed. "We don't have a good exp...

How E. coli evolves to adapt to changing acidity

...nd modest alkalinity in the small intestine during colonization of a new host. With modern sewage handling (or mishandling), the bacteria may also experience exposure to the ocean, with a pH near 8.0, before infecting a new host. To assess how E. coli might adapt to different environmental conditions, the res...

Stuck on you: CEACAM6 helps E. coli stick to intestinal lining in Crohn's disease

... indicating that this organism can promote its own colonization in individuals with Crohn's disease. The authors conclude that CEACAM6 expression in individuals with inflammatory bowel disease could be used as a diagnostic marker for Crohn's disease. ...

JCI table of contents: May 24, 2007

... indicating that this organism can promote its own colonization in individuals with Crohn's disease. The authors c... adherent-invasive E. coli supporting ileal mucosa colonization in Crohn disease AUTHOR CONTACT: Arlette Darfeuille-Michaud Universit dAuvergne, Clermont-Ferran...

Resistance genes in our food supply

...otic-resistant bacteria, partnered with occasional colonization and horizontal gene transfer, are at least partially responsible for the increased antibiotic resistance profiles seen in humans." Antibiotic resistant infections are an increasing public health problem, says Marilyn Roberts of the University of Wa...

When lava flows and glaciers recede, predicting how species take over

... rates of community change to processes that limit colonization and persistence of species: competition, harsh environmental conditions, and difficulty getting to the site. The author states, "We still have many unanswered questions regarding rates of succession. My hope is that this study will inspire and inform...

Researchers develop way to calculate speed of bacterial sex

...cell motion and transport in ground water, and the colonization of soil surfaces by bacterial cells. Using a pre...The findings revealed that bacterial transport and colonization of surfaces is as important a controlling factor for gene spread as was the rate of conjugation itse...

Invasion of the island bats

...endent bat groups, this article shows that reverse colonization is a feature of the entire Caribbean bat community, encompassing groups of bats as different from each other as aerial insectivores, nectarivores, and frugivores. The evolution of Caribbean bats suggests that far from being isolated destinations, ...

A new study links a stomach microbe to asthma prevention

... to in the esophagus. "The hypothesis that colonization of H. pylori, especially cagA strain, is protective of asthma risk needs to be tested by prospective studies. The findings from our study and others will collectively provide evidence," says Dr. Chen. If the relationship between H. pylori and...

Viral enzyme recruited in fight against ear infection

... model of acute otitis media by first establishing colonization of S. pneumoniae in the noses of mice. Scientists then infected some of the mice with influenza virus and mock-infected others with a virus-free solution. Although all the mice carried the bacteria in their noses, none of the mock-infected mice devel...

New Cell titles further ScienceDirect offering

...tudying the host immune and cellular response upon colonization or infection by a microbe. The journal will publish findings related to microbes, from molecular and cellular biology to translational studies, with particular emphasis on the interface between the microbe and its host. The unifying theme will be the...

Rickettsia felis, a cat-fleaborne pathogen, sheds light on Rickettsial evolution

...o Sobral remarked: "The role plasmids play in host colonization and virulence is not well understood, and will likely only become more apparent with the discovery of plasmids in other rickettsiae. We hope that an evolutionary perspective coupled with the characterization of the contributions of these plasmids to ...

UA researchers identify new adherence factor, Pili, produced by tuberculosis

...t facilitate the initial attachment and subsequent colonization of bacteria on human cells during bacterial infections. Many other bacteria that cause human disease produce similar adhesive factors known as pili or fimbriae that play a critical role in allowing infections to develop in the patient. This is the ...

Large size crucial for Amazon forest reserves

...rve size and isolation on the local extinction and colonization of species. The species-specific estimates of effects of area and isolation on extinction and colonization processes permit prediction of effects of future fragmentation on bird communities in these Amazon l...

Study reveals molecular basis of botulism toxin's deadly activity

...d food, certain wounds, and gastrointestinal tract colonization by the bacteria, the latter being particularly dangerous for infants. There is also growing concern that botulinum toxins might be used as weapons, with the Centers for Disease Control ranking them as one of the six highest-risk threats for bioterror...

Worms produce surprise insight into human fever

...s, and antimicrobial peptides to prevent microbial colonization of the intestine. In dissecting two conserved pathways required for C. elegans immunity to bacteria, Aballay found a wealth of data on innate immunity plus a surprising insight into another classic metazoan response to infection fever. The firs...

Freshwater snails are surprisingly fast-moving invaders

...ure and ignores the random nature of long-distance colonization events. Taking the snails into account, Facon and Patrice David (Centre dEcologie Fonctionnelle et Evolutive, CNRS) have created a new method for studying colonization. This method takes both terrain and random events into account. The real benefi...

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(Date:8/22/2014)... the birds and the bees. But that old ... fertilized. The fertilization process for flowering plants is ... male and female reproductive cells. New research from ... Munich, and including Carnegie,s Wolf Frommer, David Ehrhardt, ... signaling process that guides flowering plant fertilization. It ...
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