Programs that protect the public health through comprehensive efforts to track the incidence and distribution of disease in the population and prevent, control and eradicate vaccine-preventable diseases, vector and food-borne illnesses, diseases that are transmitted person-to-person and other diseases that are spread by direct or indirect contact. Activities include routine surveillance of communicable disease activity, assessment of the community immunization level through school records and immunization studies, investigation of epidemic outbreaks, reporting of cases of infectious diseases to the proper authorities and taking appropriate measures such as isolation and contact tracing/notification to prevent disease transmission.
Clinical laboratories that conduct hematological, cytological, bacteriological, biochemical, toxicological, histological or serological examinations of tissue, fluids and other materials obtained from patients as a means of providing information for the diagnosis, prevention or treatment of disease.
Programs that establish the nature and extent of an individual's hearing loss in order to devise an appropriate treatment plan. Evaluations may include pure tone and speech audiometry which measure hearing in terms of reception of calibrated test tones or spoken words which are presented at controlled levels of intensity; impedence tests which measure the integrity of the middle ear system and rule out conductive pathology; and auditory brain stem tests which utilize equipment similar to an EKG to measure neurological activity in response to auditory stimuli.
The above terms and definitions are part of the Taxonomy of Human Services, used here by permission of INFO LINE of Los Angeles.