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Results of a study reported in the September issue of the Journal of the American Geriatrics Society suggest that Veterans with post-traumatic stress disorder (PTSD) have a greater risk for dementia than Veterans without PTSD, even those who suffered traumatic injuries during combat.

Exposure to life threatening events, like war, can cause PTSD, and there are high rates among veterans. PSTD includes symptoms such as avoiding things or people that remind a person of the trauma, nightmares, difficulty with sleep, and mood problems.

Microbes could soon be used to convert metallic wastes into high-value catalysts for generating clean energy, say scientists writing in the September issue of Microbiology.

PULLMAN, Wash.—Side-by-side comparisons of organic and conventional strawberry farms and their fruit found the organic farms produced more flavorful and nutritious berries while leaving the soil healthier and more genetically diverse.

Intensively treating hypertension in some African Americans with kidney disease by pushing blood pressure well below the current recommended goal may significantly decrease the number who lose kidney function and require dialysis, suggests a Johns Hopkins-led study publishing in the New England Journal of Medicine Thursday.

WHAT:A molecular test designed to easily diagnose tuberculosis (TB) and detect a drug-resistant form of the bacterium that causes TB can provide much more specific, sensitive and rapid results than currently available TB diagnostics, according to a new study in the New England Journal of Medicine. In a test involving 1,730 patients with suspected drug-sensitive or multidrug-resistant pulmonary TB, the Xpert MTB/RIF TB test successfully identified 98 percent of all confirmed TB cases and 98 percent of patients with rifampin-resistant bacteria in less than two hours.

On average, a lower blood pressure goal was no better than the standard blood pressure goal at slowing progression of kidney disease among African-Americans who had chronic kidney disease resulting from high blood pressure, according to results of the African-American Study of Kidney Disease and Hypertension (AASK), the largest and longest study of chronic kidney disease (CKD) in African-Americans. However, the blood pressure goal did benefit people who also had protein in the urine, which is a sign of kidney damage.

ANN ARBOR, Mich.—Millions of Americans struggling with psoriasis and psoriatic arthritis are one step closer to a cure with the release of the first National Psoriasis Victor Henschel BioBank DNA samples for use in research at the University of Michigan Health System; research that hopes to uncover the unknowns about the genetics of psoriasis and psoriatic arthritis.

Rosemont, Ill. – Significant differences in knee alignment and muscle activation exist between men and women while kicking a soccer ball, according to a study published this month in the Journal of Bone and Joint Surgery. Data reveals that males activate certain hip and leg muscles more than females during the motion of the instep and side-foot kicks – the most common soccer kicks – which may help explain why female players are more than twice as likely as males to sustain an Anterior Cruciate Ligament (ACL) injury.

BOSTON (9/1/10) – Researchers at Boston University and the Wyss Institute for Biologically Inspired Engineering at Harvard have discovered that charitable behavior exists in one of the most microscopic forms of life—bacteria. Their findings appear in the Sept. 2 issue of Nature.

Bethesda, MD–Stress can take a daily toll on us that has broad physical and psychological implications. Science has long documented the effect of extreme stress, such as war, injury or traumatic grief on humans. Typically, such situations cause victims to decrease their food intake and body weight. Recent studies, however, tend to suggest that social stress--public speaking, tests, job and relationship pressures--may have the opposite effect--over-eating and weight gain. With the rise of obesity rates, science has increasingly focused on its causes and effects--including stress.

Drug resistant bacteria are a problem in many environments, especially healthcare institutions. While the ways in which these cells become resistant are understood at the cellular level, until now, the bacteria's survival strategies at the population level remained unclear.

STANFORD, Calif. - "There's an app for that." To a cadre of scientists, the familiar phrase will soon mean they can enter a specific RNA from baker's yeast into their iPhone and see a depiction of its two-dimensional structure - thanks to a new technology developed by scientists at Stanford University.

In the war against antibiotics, bacteria aren't selfish. According to a new report from Howard Hughes Medical Institute (HHMI) researchers, a handful of resistant pathogens can protect an entire colony.

Prevailing wisdom held that antibiotic resistance works only on an individual level: a bacterium acquires a genetic mutation that confers protection against a drug, allowing it to survive and reproduce. Eventually, as vulnerable bacteria die, the mutant's stronger progeny repopulate the colony.

New findings show the value of genetic studies across human populations and the value of the latest DNA sequencing technologies to interrogate genetic variation. The results, from the latest phase of the international HapMap Project, are reported in Nature.

An international consortium today published a third-generation map of human genetic variation, called the HapMap, which includes data from an additional seven global populations, increasing the total number to 11 populations. The improved resolution will help researchers interpret current genome studies aimed at finding common and rarer genetic variants associated with complex diseases.