Overview of Testing for SARS-CoV-2 | COVID-19 | CDC Positive viral test results indicate current infection and the person with COVID-19 should take steps to prevent spreading COVID-19 to others Negative viral test results mean the test did not detect the virus, but this doesn't rule out that the person could have an infection These results represent a snapshot of the time around specimen
Testing for COVID-19 | COVID-19 | CDC - Centers for Disease Control and . . . A single NAAT test can be used to confirm an antigen test result *Self-tests, or at-home tests, are antigen tests that can be taken anywhere without having to go to a specific testing site Read self-test package inserts thoroughly and follow the instructions closely when performing the test When you get tested
Clinical Testing and Diagnosis for Tuberculosis It is the only kind of TB skin test solution that is FDA-approved for this test method After 48–72 hours, the skin test reaction must be examined by a trained health care worker The health care worker measures any swelling where the tuberculin was injected to determine if the reaction to the test is positive or negative
Screening for Cervical Cancer | Cervical Cancer | CDC The HPV test and the Pap test can help prevent cervical cancer or find it early The HPV test looks for the virus (human papillomavirus) that can cause cell changes on the cervix The Pap test (or Pap smear) looks for precancers, cell changes on the cervix that might become cervical cancer if they are not treated appropriately
Laboratory Testing for Epstein-Barr Virus (EBV) Monospot test The Monospot test is not recommended for general use The antibodies detected by Monospot can be caused by conditions other than infectious mononucleosis Moreover, studies have shown that the Monospot produces both false positive and false negative results
Clinical Testing Guidance for Tuberculosis: Tuberculin Skin Test If the TB skin test is used for baseline testing of U S health care personnel, use two-step testing Two-step testing If the first TB skin test result is negative, a second TB skin test should be done 1 to 3 weeks later If the second TB skin test result is positive, it is probably a boosted reaction
Screening for Prostate Cancer | Prostate Cancer | CDC Prostate specific antigen (PSA) test A blood test called a prostate specific antigen (PSA) test measures the level of PSA in the blood PSA is a substance made by the prostate The levels of PSA in the blood can be higher in men who have prostate cancer The PSA level may also be elevated in other conditions that affect the prostate
Screening for Genital Herpes | Genital Herpes | CDC The chances of wrong test results are higher for people who are at low risk of infection Blood tests might be useful if: You have genital symptoms that could be related to herpes You have (or have had) a sex partner with genital herpes Your provider found signs of herpes, but you still need a test to confirm it
Fit Testing | Personal Protective Equipment | CDC 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
Getting Tested for HIV | HIV | CDC - Centers for Disease Control and . . . A self-test can be used at home or in a private location With an HIV self-test, you can get your test results within 20 minutes You should always interpret HIV self-test results according to the manufacturer's instructions If the HIV self-test is invalid, then the test did not work