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Tag: "prevalent" at biology news

Dirty snow may warm Arctic as much as greenhouse gases

... retains more heat,” Zender said. Dirty snow is prevalent in East Asia, Northern Europe and Northeastern United States. Zender believes policymakers could use these research results to develop regulations to mitigate global warming. Limiting industrial soot emissions and switching to cleaner-burning fuel...

Researchers discover 'acquired' DNA key to certain bacterial infection

...which can result in serious lung infections and is prevalent in emphysema and AIDS patients among others – infects tissue cells or “macrophages” and thus compromises the body’s immunity. Results of the study, led by researchers at Oregon State University, will be published online this week in the Proceedings ...

Parasites' impact goes beyond host to affect ecosystem

...ves to a fish as its second host. Shorebirds ?more prevalent on Appledore than on the mainland ?are the final hosts, contracting infection by eating infected fish, then in their feces excreting the eggs of C. lingua, which are in turn eaten by the snails. "The parasite’s life cycle is a really amazing strat...

100 percent of pregnant women have at least one kind of pesticide in their placenta

....1%) y endosulfan-I (54.2%). Among these, the most prevalent was endosulfan-diol, with an average concentration of 4.15 nanograms per gram of placenta (156.73 ng/g lipid). Surprisingly, the UGR researcher discovered that some patients?placentas contained 15 of the 17 pesticides analyzed. A total of 668 samp...

Common gene version optimizes thinking -- but with a possible downside

...al cortex. However, the same version was also more prevalent among people who developed schizophrenia, a severe mental illness marked by delusions, hallucinations and impaired emotion that affects one percent of the population. "We have found that DARPP-32 shapes and controls a circuit coursing between the...

Africa's first large-scale HIV vaccine study launches

... to protect against the clade C virus, the subtype prevalent in South Africa. Phase IIb trials cannot be used to support licensure of a vaccine, however, the data from this study will guide whether this type of vaccine approach offers promise to interrupt the continued spread of HIV. Additionally, the South...

Anxiety disorders surprisingly common yet often untreated

...in 15 primary care clinics, found anxiety to be as prevalent as depression, and much more common than previously thought, in patients who were visiting a physician for a physical problem or illness. "Anxiety often manifests as a physical symptom like pain, fatigue, or inability to sleep, so it is not surpr...

Antifungal drug kills TB bug

...re essential for steroid metabolism; they are also prevalent in the liver where they help us detoxify and dispose of countless chemicals and toxins that enter our system. Most bacteria have few, if any, P450s but we discovered that the TB bacterium has 20 different types." Even more exciting for the team wa...

Darwin's famous finches and Venter's marine microbes

... sort of niche players, but actually they are more prevalent and widespread than histidine kinases," explains Manning. Bacteria were thought to rely mostly on histidine kinases, which are structurally different from protein kinases, for all their signaling needs. Even though the different kinase families ha...

Scientists sequence genome of parasite responsible for common sexually transmitted infection

...e researchers. "Although trichomoniasis is very prevalent as a sexually transmitted infection, it has not received the attention given to other STIs," says Carlton. "Women are the population most affected by it, yet routine gynecological check-ups do not test for this particular infection, and it's not an S...

Canadian study shows bilingualism has protective effect in delaying onset of dementia by four years

...luded speakers of 25 different languages, the most prevalent being Polish, Yiddish, German, Romanian and Hungarian. Researchers found that 132 patients met criteria for probable Alzheimer's; the remaining 52 were diagnosed with other dementias. Patient data included Mini-Mental State Examination (MMSE) score...

1/3 of sexually active older adults with HIV/AIDs has unprotected sex

...The study also found that sexual activity was more prevalent among HIV-positive older adults who were not cognitively impaired, were younger and who considered their overall health to be good. Because many older adults with HIV are not sexually active, those who do have unprotected sex account for just 13...

Multiple malaria infection inhibits spread of parasite

...e investigated for this purpose. Malaria is highly prevalent in Papua. After just one to four malaria infections the immunity against the infectious gametocytes increased. Immunity therefore develops quickly after exposure to an infection. The researchers expect that the modified methods will make it possible ...

Study finds mercury prevalent in many western fish

...ceeding that 0.3 mg level. Salmonids were the most prevalent group of species, found in 41 percent of the network sampled. On the other hand, large bass, walleye and other piscivores were found in only 10 percent of the streams and rivers, yet 57 percent of them met or exceeded the 0.3 microgram level. "Th...

It's in your head: The brain's own globin defends you from shock and stroke

...scle), neuroglobin is found in neurons and is most prevalent in areas of the brain that have adapted to physiological stress, such as stroke. Unlike hemoglobin or myoglobin, however, neuroglobin's primary function does not appear to involve transporting oxygen. Instead, the authors suggest that neuroglobin is ...

Selecting life: Scientists find new way to search for origin of life

...Calcite, one such mineral, is common today and was prevalent during the Archean Era when life first emerged. In 2001 Hazen and colleagues performed the first experiments showing that the left-handed amino acid, aspartic acid, preferentially adhere to left-faced calcite. That study confirmed previous theoretica...

HIV/AIDS linked to extensively drug resistant TB

...now that we know that MDR tuberculosis is far more prevalent than previously thought and that XDR tuberculosis has been transmitted to HIV co-infected patients and associated with high mortality." Future studies will involve defining the extent and consequences of the problem in greater detail, Friedland sa...

Replacing insulin is top-ranked breakthrough foreseen for health in developing world

...d countries. They are also much more likely to be prevalent in the poor and have resulted in more deaths in 2005 than infectious disease, maternal and perinatal conditions, and nutritional deficiencies combined. The authors say low and middle income countries as a group report 80% of all chronic disease deat...

Pattern of human Ebola outbreaks linked to wildlife and climate

...ctors. Illness and deaths among animals were most prevalent during periods of prolonged drought-like conditions in the rainforest, which indicates that severe environmental stress may facilitate disease transmission. In the study, the researchers urge that public education is needed to decrease human con...

New engineered drug may offer prolonged arthritis relief

...ults in the United States. It is the nation's most prevalent musculoskeletal disorder and the leading cause of disability, the researchers said, adding that as the average age of the population continues to rise, the incidence of osteoarthritis will increase. Osteoarthritis had been attributed primarily to t...

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