It is done to detect diseases early in people that may look and feel well.
This may be of use in future as a low cost alternative to detect certain diseases.
Until 1999, the disease had never even been detected in North America.
The window period for a test is the amount of time from the initial infection event until the disease can be detected.
For now, the disease can be detected only in the brains of dead cattle.
The disease was first detected in 1981 when the men in the new study were 3 to 9 years old.
It would work with community groups on preventive education, do screening to detect disease, and provide treatment.
Screening trials test the best way to detect certain diseases or health conditions.
When the disease is detected early, it can be successfully treated with antibiotics.
The disease is usually detected, he noted, when people have lost chunks of their visual field, including many P cells.