Center for disease control diagnostic immunology proficiency testing program results for 1976

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Abstract
Over 900 laboratories participated in the Diagnostic Immunology portion of the 1976 Proficiency Testing Program, which was provided by the Center for Disease Control [USA] under the authority of the Clinical Laboratories Improvement Act of 1967. Specimens (100) prepared by the Center for Disease Control for analysis were distributed on a quarterly schedule or in special surveys. Feedback from participating laboratories included over 37,500 qualitative and 33,000 quantitative responses, which were analyzed to determine individual laboratory proficiency levels. Information supplied by participants in each survey helped to delineate trends in testing protocols. The specimens chosen for analysis called for a broad range of tests commonly performed in diagnostic immunology laboratories, including those for rubella antibodies, hepatitis B surface antigen, bacterial antibodies, rheumatoid factor, immunoglobulins and other serum-specific proteins and carcinoembryonic antigen. A summary of the data analysis is provided so that the laboratories can improve their overall performance levels.