817,292 articles

'Hygiene hypothesis' challenged: Day care doubles early respiratory problems

New research hints that the common belief that kids who go to daycare have lower rates of asthma and allergy later in life might be nothing more than wishful thinking. While young children in daycare definitely do get more illnesses and experience more respiratory symptoms as a result, any perceived protection these exposures afford against asthma and allergy seem to disappear by the time the...

Contraband cigarettes account for 17 percent of all brands consumed by adolescent smokers

Consumption of contraband cigarettes amongst adolescent daily smokers in Canada accounts for 17% of all cigarettes smoked by this age group, and rises to more than 25% in Ontario and Quebec. This behaviour may be undermining tobacco-prevention strategies, as they focus on taxation and minimum age restrictions to curb and prevent smoking, states an article in CMAJ (Canadian Medical Association...

New vaccine shows promise for COPD patients at risk for pneumonia

A new vaccine against pneumonia may offer better protection from chronic obstructive pulmonary disease (COPD) patients than the currently accepted vaccine, according to recent research that will be published in the September 15 issue of the American Journal of the Respiratory and Critical Care Journal, a publication of the American Thoracic Society.

Using insects to test for drug safety

Insects, such as some moths and fruit flies, react to microbial infection in the same way as mammals and so can be used to test the efficiency of new drugs, thereby reducing the need for animal testing. Dr Kevin Kavanagh from the National University of Ireland - Maynooth, presented his research findings at the Society for General Microbiology's meeting at Heriot Watt University, Edinburgh, today...

New Research Strategy For Understanding Drug Resistance In Leukemia

Researchers have developed a new approach to identify specific genes that influence how cancer cells respond to drugs and how they become resistant. This strategy, which involves producing diverse genetic mutations that result in leukemia and associating specific mutations with treatment outcomes, will enable researchers to better understand how drug resistance occurs in leukemia and other...

Anticancer Compound Found In Common Weed: American Mayapple

A common weed called American mayapple may soon offer an alternative to an Asian cousin that's been harvested almost to extinction because of its anti-cancer properties. The near-extinct Asian plant, Podophyllyum emodi, produces podophyllotoxin, a compound used in manufacturing etoposide, the active ingredient in a drug used for treating lung and testicular cancer. Podophyllyum emodi is a cousin...

Using Microbes For The Quick Clean Up Of Dirty Oil

Microbiologists have used mixed consortia of bacteria to break down and remove toxic compounds from crude oil and tar sands. These acidic compounds persist in the environment, and can take up to 10 years to break down. By using this microbial mixture, complete degradation of specific compounds was achieved in only a few...

Designing Probiotics That Ambush Gut Pathogens

Researchers in Australia are developing diversionary tactics to fool disease-causing bacteria in the gut. Many bacteria, including those responsible for major gut infections, such as cholera, produce toxins that damage human tissues when they bind to complex sugar receptors displayed on the surface of cells in the host's...