Programs that utilize one or a combination of diagnostic tools to test large groups of people who are assumed to be well for the presence of a particular disease or condition or for certain risk factors that are known to be associated with that disease or condition; or which conduct in-depth tests to establish the cause and nature of an individual's presenting illness. The purpose of screening is to identify people who have a potential problem and refer them for early diagnosis and treatment and, where possible, to provide preventive measures. Early identification is particularly important when dealing with conditions that are more difficult to treat when fully developed. The purpose of more in-depth diagnostic work is to establish a logical basis for ongoing treatment.
Programs that perform a laboratory analysis of body fluids and tissue to determine the presence of irregularities or to identify unknown substances submitted for analysis.
Programs that are staffed by specialists who have expertise in diagnosing abnormal changes in tissue removed during surgery and postmortem examinations. they analyze case histories, prepare tissues for microscopic examination, and diagnose the nature and source of pathological conditions causing illness or death.
The above terms and definitions are part of the Taxonomy of Human Services, used here by permission of INFO LINE of Los Angeles.