For decades, doctors have been using antibiotics to fight tuberculosis (TB). And consistently, the microbe responsible for the disease, Mycobacterium tuberculosis, has been fighting back. When confronted with current drugs, such as the antibiotic rifamycin, the bacterium often mutates in ways that make it resistant to the treatment.

Mercury is an incredibly stubborn toxin. Once it is emitted from the smokestacks of coal-fired power plants, among other sources, the gas can drift through the atmosphere for up to a year before settling into oceans and lakes. It can then accumulate in fish as toxic methylmercury, and eventually harm the people who consume the fish.

Many vendors at farmers markets take inadequate precautions to prevent the spread of foodborne illness, and they should be trained to reduce food-safety risks, according to Penn State researchers who completed the final phase of an innovative five-year study.

Political studies professor Ryan Katz-Rosene presents the case for embracing complexity when it comes to making dietary choices.

Halloween is just around the corner, and some people will celebrate by watching scary movies about brain-eating zombies. But even more frightening are real-life parasites that feed on the human brain, and they can be harder to kill than their horror-movie counterparts. Now, researchers have developed silver nanoparticles coated with anti-seizure drugs that can kill brain-eating amoebae while sparing human cells. The researchers report their results in ACS Chemical Neuroscience.

A newly published scientific paper indicates that occupational safety and daily day performance in 7 out of 10 workers, from several European industries, is negatively affected by a combination of heat stress and failure to maintain water balance. The study combines field observations and motor-cognitive testing in the lab, and was conducted by the Pan-European Heat-Shield project coordinated by researchers from Department of Nutrition, Exercise and Sports at University of Copenhagen.

Insect repellents containing picaridin can be lethal to salamanders. So reports a new study published today in Biology Letters that investigated how exposure to two common insect repellents influenced the survival of aquatic salamander and mosquito larvae.

Men who eat plenty of fermented dairy products have a smaller risk of incident coronary heart disease than men who eat less of these products, according to a new study from the University of Eastern Finland. A very high consumption of non-fermented dairy products, on the other hand, was associated with an increased risk of incident coronary heart disease. The findings were published in the British Journal of Nutrition.

Scientists at Indiana University found high levels of a previously unsuspected pollutant in homes, in an electronic waste recycling facility and in the natural environment. People are likely to be exposed to this pollutant by breathing contaminated dust or through skin contact.

For the first time – in Norway and internationally – researchers have looked at the direct correlation between brain size and cancer risk in adults.