A protein that can reduce the damage from a stroke up to 12 hours after it strikes has been discovered.

Paris - Government scientists in Australia are reporting progress on developing a blood test to screen people for Alzheimer's disease, the most common form of dementia.

In tests on more than 1,000 people, an experimental test did a good job of indicating how much of the telltale Alzheimer's plaque lurks in the brain.

If the test proves accurate in larger studies, it could offer a way to check people having memory problems to see who needs more definitive testing for the disease.

The results were reported Wednesday at an Alzheimer's conference in France. - Sapa-AP