The virus can be detected in each part of the host plant.
Nor could the virus be detected directly using the best available tests.
The virus could not be detected at other times, indicating significant protection.
The virus has been detected at hundreds of sites before it was able to do any harm.
The technique is often used to detect viruses, but generally does not work for bacteria.
He said the system might also be used to detect viruses, or to determine if someone was trying to break into restricted files.
The virus has been detected in 30 states, mostly in the West.
Tests showed that the virus could be detected only once and in very small amounts during a 48-week monitoring period.
Diacrin said it had not detected such viruses in any patient.
But the virus had not been detected in the United States until the outbreak this summer.