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For the firefighters and rescue workers conducting the rescue and cleanup operations at Ground Zero from September 2001 to May 2002, exposure to hazardous airborne particles led to a disturbing "WTC cough" -- obstructed airways and inflammatory bronchial hyperactivity -- and acute inflammation of the lungs. At the time, bronchoscopy, the insertion of a fiber optic bronchoscope into the lung, was the only way to obtain lung samples. But this method is highly invasive and impractical for screening large populations.

There are pros and cons to the support that victimized teenagers get from their friends. Depending on the type of aggression they are exposed to, such support may reduce youth's risk for depressive symptoms. On the other hand, it may make some young people follow the delinquent example of their friends, says a team of researchers from the University of Kansas in the US, led by John Cooley. Their findings are published in Springer's Journal of Psychopathology and Behavioral Assessment.

Patients with heart disease who receive transfusions during surgeries do just as well with smaller amounts of blood and face no greater risk of dying from other diseases than patients who received more blood, according to a new Rutgers study.

The research, published in the journal Lancet, measures overall mortality and mortality from cardiovascular disease, cancer and severe infection, and offers new validation to a recent trend toward smaller transfusions.

COLUMBIA, Mo. - Previous cancer research has revealed that women are less likely than men to suffer from non-sex specific cancers such as cancer of the colon, pancreas and stomach. Scientists theorized that perhaps this trend was due to a protecting effect created by female hormones, such as estrogen, that help prevent tumors from forming. Now, researchers at the University of Missouri have found evidence suggesting that the male hormone testosterone may actually be a contributing factor in the formation of colon cancer tumors.

Ants: Ever since agriculture evolved ca 10.000 years ago, plants have been artificially selected to become the fast growing and highly productive varieties we know today. However, humans were not the first to see merit in cultivating their own food, as ants have been doing this for 50 million years. A lineage of South-American ants collect leaves and recycle their own feces to manure a fungus garden for food. New research shows that these ants have an evolutionary history of improvement of their fungal crops.

ANN ARBOR, Mich. - Urinary tract infections can occur with no apparent cause, and as effectiveness of antibiotics fades, treating them is also becoming less predictable.

University of Michigan Medical School researchers have identified bacterial genes that help the infections spread, providing a potential new target for treating UTIs, a global public health concern mostly affecting women. UTIs lead to lost work time, emergency room visits and health care spending of $3.5 billion in the United States.

A new study by Robert Stahelin, an adjunct associate professor of chemistry and biochemistry at the University of Notre Dame and an associate professor at the Indiana University School of Medicine-South Bend, as well as a member of Notre Dame's Eck Institute for Global Health, investigates how the most abundant protein that composes the Ebola virus, VP 40, mediates replication of a new viral particle.

Hair loss can be devastating for the millions of men and women who experience it. Now scientists are reporting that a substance from honeybee hives might contain clues for developing a potential new therapy. They found that the material, called propolis, encouraged hair growth in mice. The study appears in ACS' Journal of Agricultural and Food Chemistry.

Cigarette smoking generates as much as $170 billion in annual health care spending in the United States, according to a new study co-authored by researchers at Georgia State University's School of Public Health, the Centers for Disease Control and Prevention (CDC) and RTI International.

Dr. Terry F. Pechacek, a professor of health management and policy at Georgia State, was the senior author of the study, "Annual Healthcare Spending Attributable to Cigarette Smoking (An Update)," which was published Wednesday by the American Journal of Preventive Medicine.

Fatigue and pain, along with other symptoms, prevent many people with multiple sclerosis (MS) from exercising. But a new how-to guide for a home-based exercise program, tested by researchers at Case Western Reserve University's nursing school and the Lerner Research Institute at the Cleveland Clinic, offers a way for people with MS to stay more physically active.

A Danish Research Team identified a molecular mechanism that ensures that when cells divide, the genomic material passes correctly to the resulting daughter cells:

"The process, known as chromosome segregation, is vitally important because incorrect passage of the genomic material makes cells prone to develop into cancer cells," says Jakob Nilsson, associate professor at the Novo Nordisk Foundation Center for Protein Research.

The new discovery depends on a protein called BubR1 which if mutated can cause cancer.

The Ebola virus travels from person to person through direct contact with infected body fluids. But how long can the virus survive on glass surfaces or countertops? How long can it live in wastewater when liquid wastes from a patient end up in the sewage system? In an article published Dec. 9 in the journal Environmental Science & Technology Letters, Kyle Bibby of the University of Pittsburgh reviews the latest research to find answers to these questions.

A team of researchers from the Cockrell School of Engineering at The University of Texas at Austin and environmental testing firm URS reports that a small subset of natural gas wells are responsible for the majority of methane emissions from two major sources -- liquid unloadings and pneumatic controller equipment -- at natural gas production sites.

A happy worker is a productive worker. That adage may be true, according to a new study from The University of Texas at Dallas.

Two UT Dallas public affairs researchers found that family-friendly policies are beneficial for increasing productivity of employees in public organizations, and the authors said the finding likely lends itself to job satisfaction and commitment.

PHILADELPHIA--Two-thirds of women treated for early-stage breast cancer in the U.S. receive longer radiation therapy than necessary, according to a new study published in JAMA this week from Penn Medicine researchers Ezekiel J. Emanuel, MD, PhD, and Justin E. Bekelman, MD.