Tag: "spreads" at biology news

How stress maintains population levels

...o weeks or so. Nevertheless, the disease probably spreads most rapidly where the birds sleep together in large, crowded roosts, quite often among populations that do not make regular use of bird feeders. Dhondt emphasizes that mycoplasmal conjunctivitis cannot be transmitted to humans. And he hopes that ...

Just-published research shows for the first time that Lyme Disease bacterium does not require iron to infect host

...e is introduced into the human host. The infection spreads to different parts of the body and is often accompanied by such symptoms as fatigue, body aches, headache, fever and a stiff neck. Treatment with antibiotics in early stages of the disease is effective in most cases. The Lyme disease microbe is extr...

A highly conserved mechanism used during the development of zebrafish and fruitfly eyes points to a common evolutionary origin of animal eyes

...cells in the eye. These nerves form in a wave that spreads from the center to the periphery of the retina. The Sonic Hedgehog gene encodes a protein which is secreted by cells and acts as a signal to other cells. Using the tools of molecular genetics, Neumann and Nuesslein-Volhard show that the first nerves ...

Gene found to contribute to deadly form of breast cancer

... breast cancer, and may help explain why it grows, spreads and sometimes proves deadly so quickly. The finding, published in the Oct. 15 issue of the journal Cancer Research, confirms the team's earlier suspicions that a gene called RhoC GTPase is a key factor in inflammatory breast cancer. Just over a ye...

Bill & Melinda Gates Foundation awards $15.1 million to treat African sleeping sickness, leishmaniasis

... sleeping sickness, which is fatal unless treated, spreads among people bitten by the tsetse fly. Symptoms begin with a low-grade fever, pain in the joints and itchy skin. Eventually, the parasitescarrying the disease enter the brain. Then hallucinations and unpredictable, disruptive behavior are common. A v...

Pharmaceutical 'smart bomb' targets cancer cells

...odrug "bomb" goes off and unleashes the toxin that spreads to neighboring cells which ultimately kills the tumor. The English contingent also developed a compound that is being evaluated in clinical trials as an anticancer prodrug. But Hu's new compounds appear to be even more potent. The overseas researc...

Card tricks and mathematics: Applying the magician's trade to numerical dilemmas

...t and explain how particles interact. First, he spreads a deck of cards on a table. Each card represents an individual atom, he says, and each has a unique position relative to the others. Also, every card appears either face-up or facedown, which Diaconis equates to individual atoms that can move either ...

Unusual source of ocean water contamination may rewrite environmental textbooks

...ea gulls as the source of the contamination, which spreads from the marsh to the shallow ocean water near the beach. Depending on a wetland's size and water flow rates, some 4.6 million saltwater marshes in the continental United States could be affected similarly, Grant said. Research to that effect could t...

Researchers' mathematical model provides chagas disease insights

...y on dogs and secondarily on humans, which rapidly spreads the prevalence of T. cruzi among bugs. This in turn increases the infection rate among dogs and humans. Because triatomine bugs are more likely to feed on chickens and dogs than on humans, summer infection rates grow for humans as people share domest...

Human population growth already slowing

... in numbers, its population may grow rapidly as it spreads out in a new habitat and previous growth may have no effect. Later, as crowding sets in, more growth leads to depletion of resources, squabbles and other events that slow the rate of growth. What has been missing from classical ecological equations i...

New insight into diet and colon cancer

...have also determined for the first time how cancer spreads among cells in the colon. "Looking at how colo... The researchers also compared how cell damage spreads at both ends of the colon. "Within the colon, there are different degrees of cancer at differen...

Vaccination following spinal cord injury: Innovative Weizmann Institute approach limits paralysis

...us system (brain or spinal cord), a wave of damage spreads from the injury site over several days or weeks, killing nerve cells and fibers that survived the initial trauma. This secondary degeneration can be even more destructive than the initial damage. As a result, an injury that initially inflicted only p...

Aggressive tumor cells leave a trail in their environment that affects the spread of cancer

... plays a major role in how wounds heal, how cancer spreads through the body (metastasis) and how the body deals with inflammation. Certain members of the MMP family of proteins contribute to the aggressiveness of cancer cells. MMPs are important in helping tumor cells leave a primary tumor and move into and ...

UGA researcher unlocks links between complex carbohydrates and spread of cancer

... that could help unravel the mystery of how cancer spreads in the human body. If he and his team of researchers can find an inhibitor of this enzyme that works in the body, they may be able to develop a drug that would bind to that enzyme and prevent or slow the migration of cancer cells. "The real killer i...

Typhoid fever bug sequence raises hope of complete eradication

... and improve understanding of the way the bacteria spreads in communities and the mechanisms by which it caus...ormation and clues as to how it causes disease and spreads in the environment and food chain." "By studying such a lethal strain of Salmonella, this research a...

Study: Immunize refugee children early to prevent deadly measles

...ects the respiratory tract and spreads throughout the body, and is transmitted by airborne droplets breathed or coughed by a contagious person. Measles remains one of the leading causes of...

Natural protein helps prevent cancers from spreading to other organs

...cientific society. A cancer is most deadly when it spreads to multiple organs, a process called metastasis. But doctors who find a malignant tumor that seems to be limited to one organ cannot simply cut it out because doing so often means secondary tumors start to grow rapidly. In studies with mice, David Wa...

Assaulting the mosquitos sense of smell

...frican mosquito that feeds primarily on humans and spreads malaria that are extremely similar to genes generally considered to code for odorant receptors in the fruit fly Drosophila, which serves as a scientific model for insects. The researchers also determined that these genes are only expressed in the mo...

BSE in sheep: First estimates of human death toll

...ee different scenarios: a 'worst-case' whereby BSE spreads both within and between flocks; a situation where BSE spreads only within a flock but not between flocks; and a 'best case' where BSE does not spread either withi...

West Nile Virus heading toward Texas

...at Texas A&M University. "This insect-borne virus spreads through the sting of infected mosquitoes and is carried by birds who act as reservoirs. While humans may become infected, the condition isn't usually too serious. Most healthy adults contracting the disease in the United States experience flu-like sy...

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