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Tag: "warn" at biology news

HIV Infection Still On The Rise

... failing to stem the rising rate of HIV infection, warn two senior doctors in an editorial in this week's BMJ. An estimated 38 million people worldwide, including over 2 million children, are now infected with HIV, and a record 4.8 million became infected in 2003. The underlying reason for this continui...

Scientists journey to southern Africa to unravel the secret world of elephant communication

...ding herds also use low-frequency vocalizations to warn of predators. Adult bulls and cows have no enemies, except for humans, but young elephants are susceptible to attacks by lions and hyenas. When a predator appears, older members of the herd emit intense warning calls that prompt the rest of the herd ...

UN: World in big ecological mess

...nce remains incomplete, the report finds enough to warn that ongoing degradation of 15 of the 24 ecosystem services examined ?including fresh water, capture fisheries, air and water regulation, and regulation of regional climate, natural hazards and pests ?increases the likelihood of potentially abrupt ch...

Pregnant women at higher risk for HIV, Uganda study finds

... Sciences. "We believe that it would be prudent to warn women of this potential risk of HIV acquisition during pregnancy and promote safe sex or sexual abstinence where feasible." The study supports the findings of two previous studies that reported a greater risk of acquiring HIV during pregnancy than a...

Millennium Ecosystem Assessment: Many of 2 billion dryland dwellers at risk as land degrades

...people even continents away, international experts warn in a new report. Thick storms rising out of the Gobi Desert affect much of China, Korea and Japan and even reduce air quality over North America, according to Ecosystems and Human Well-Being: Desertification Synthesis. The report is based on informa...

Scientists show that tick-borne flaviviruses use a novel mechanism to evade host defenses

...rst appeared or emerged in the U.S. in 1999 should warn us about the potential for tick-borne flaviviruses to emerge on other continents." In preparation for such a development, Dr. Fauci notes that two other NIAID laboratories have similar flavivirus studies under way, and the three groups are building o...

Crisis in African fish supplies looms, experts warn Africa leaders

...er, a global development and science organization, warn exploitation of natural fish stocks is leveling off as the population steadily grows. African countries face a major challenge to ensure fish supply to the estimated 200 million mainly poor people relying on fish as a main part of their diet. Also a...

Leptin-signaling Protein Maintains Normal Body Weight And Energy Balance In Mice

...er, a global development and science organization, warn exploitation of natural fish stocks is leveling off as the population steadily grows. African countries face a major challenge to ensure fish supply to the estimated 200 million mainly poor people relying on fish as a main part of their diet. Also a...

Mayan stingless bee keeping: Going, going, gone?

...the Smithsonian Tropical Research Institute (STRI) warn of the imminent demise of stingless bee keeping on the Yucatan ?a result of ongoing cultural change and habitat loss. "In our initial surveys of bee keepers working with native bees in the eighties, we estimated that they maintained more than a thou...

Primate virus jumps species barrier to humans for first time in Asia

... to humans may not prove dangerous, the scientists warn that the dense human and primate populations in As.... However, Jones-Engel and her fellow researchers warn that there are other primate viruses known to be harmful that could jump the species barrier. They d...

WCS says avian flu prevention should focus on farms, markets

...ronx Zoo-based Wildlife Conservation Society (WCS) warn that efforts to control the spread of avian flu across Asia and beyond must focus on better management practices on farms and in markets. WCS is currently working with Mongolian agencies on the ground in Mongolia's Kovsgol province, collecting sampl...

DDT-resistant insects have additional genetic advantage that helps resistance spread

...rive even when spraying is abandoned. Researchers warn that the same process may be going on when doctors across the world prescribe antibiotics to cure infections. Antibiotic resistance may potentially confer the same kind of genetic advantage to 'superbug' bacteria, and measures such as preventing cert...

Langerhans cells regulate immune reactions in the skin

...ly assumed that the Langerhans cells only serve to warn the immune system of skin pathogens. According to the study, featured on the cover of the December 15 issue of Immunity, Langerhans cells are not required and, in fact, inhibit or modulate immune responses in the skin. Daniel H. Kaplan, M.D., and ...

Overfishing in inland waters reduces biodiversity and threatens health

...of the Republic of Benin. Allan and his coauthors warn that overfishing of inland waters has the potential for severe impacts on human health, particularly in developing countries. For example, fish consume the vectors of important diseases such as schistosomiasis. The authors also conclude that there is...

Human trial proves ricin vaccine safe, induces neutralizing antibodies; further tests planned

... of castor oil production ?public health officials warn that ricin could be used for terrorism. Indeed, there have been several incidents in recent years involving the toxin in the United States and Europe. The CDC classifies ricin as a "Category B" biological agent, which means it is "relatively easy to ...

Learning to love bacteria: Stanford scientist highlights bugs' benefits

... mention the cleaning product industry, repeatedly warn of their dangers. But a Stanford University School of Medicine microbiologist is raising the intriguing idea that persistent bacterial and viral infections have benefits. Stanley Falkow, PhD, the Robert W. and Vivian K. Cahill Professor in Cancer Re...

Scientists look to the Bahamas as a model for coral reef conservation

... mention the cleaning product industry, repeatedly warn of their dangers. But a Stanford University School of Medicine microbiologist is raising the intriguing idea that persistent bacterial and viral infections have benefits. Stanley Falkow, PhD, the Robert W. and Vivian K. Cahill Professor in Cancer Re...

Oceans are 70 percent shark free

...sible reason could be due to lack of food. They warn their finding has environmental implications. Professor Monty Priede, Director of Oceanlab at the University of Aberdeen, said: "Sharks are apparently confined to around 30% of the world's oceans, and all populations are therefore within reach of hu...

Duck-billed dino crests not linked to sense of smell

...used to create resonant sounds to attract mates or warn of predators, or that they were used for visual display in mate selection or species recognition, similar to feather crests in some birds. ...

Food-crop yields in future greenhouse-gas conditions lower than expected

...and other enclosed test conditions ?and scientists warn that global food supplies could be at risk without changes in production strategies. The new findings are based on on-going open-air research at the University of Illinois at Urbana-Champaign and results gleaned from five other temperate-climate loc...

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