The test is a pass/fail test that determines whether you can detect a test agent, such as through taste, smell, or an involuntary cough. The OSHA-accepted fit test protocols provide complete instructions for conducting qualitative fit tests with the accepted test agents. NIOSH does not endorse or recommend the use of the irritant smoke fit test., Laboratory testing can help distinguish whether someone is susceptible to EBV infection or has a recent or past infection. Healthcare providers can test for antibodies to specific EBV-associated antigens. Monospot test is not recommended for general use., CDC recommends testing blood for lead exposure. A patient’s blood lead level (BLL) is measured in micrograms of lead per deciliter of blood (μg/dL). Healthcare providers should follow recommendations based on initial screening capillary and confirmed venous BLLs. Learn more about the recommended actions after a blood lead level test., Laboratory diagnosis of Lyme disease relies on serologic testing for antibodies to Borrelia burgdorferi. CDC recommends a two-step serologic testing process using FDA-cleared assays. Serologic assays may be falsely negative during the first 4-6 weeks after infection. Before CDC will recommend new tests, they must be cleared by the Food and Drug Administration (FDA)., For more details on interpreting TB skin test results, please visit Clinical Testing Guidance for Tuberculosis: Tuberculin Skin Test. TB skin results should only be read by a trained health care professional. Consult with your state and local public health authorities to determine who is authorized to place and read TB skin tests in your state., Waived test results, such as prothrombin time and glucose levels, adjust medication dosages for anticoagulant therapy and diabetes. In addition, erroneous results from diagnostic tests, such as those for human immunodeficiency virus (HIV) antibody, can have unintended consequences..