The prevalence of infection with Echinostoma revolutum flukes ranged from 7.5% to 22.4% in 4 schools surveyed in Pursat Province, Cambodia, tested fecal specimens from 471 children, 10-14 years of age, in June 2007.

Although the network worked well, the assumption had been that the labs would mostly test specimens from sick patients.

In this mode, the TESS can test larger specimens over larger displacement ranges more typical of seismic vibrations.

It makes objective, tough-sounding noises about testing human specimens, but it keeps its own nature secret.

At Christmastime in 1976, Dr. Joseph McDade, a C.D.C. laboratory scientist who had tested specimens from the outbreak, was harshly criticized at a party for his agency's failure to solve the mystery.

The Jockey Club has its own laboratory that tests specimens from horses selected in every race.

Each can test blood, urine, spinal fluid and other specimens for microbes and chemicals that might be involved in a bioterrorist attack.

The C.D.C. has tested specimens from only two patients and is awaiting more specimens from additional patients in affected areas.

The damage looked like that produced by endemic syphilis, so the scientists tested specimens with serums containing syphilis antibodies.

Seroprevalence is the number of persons in a population who test positive for a specific disease based on serology (blood serum) specimens; often presented as a percent of the total specimens tested or as a proportion per 100,000 persons tested.