
Testing for COVID-19 | COVID-19 | CDC - Centers for Disease …
Mar 10, 2025 · 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
Genetic Testing | Genomics and Your Health | CDC
Whole genome sequencing is the largest genetic test and looks at all of a person's DNA, not just the genes. Your healthcare provider might recommend exome sequencing or whole genome sequencing if you or your child has a complex medical condition, or if other testing has not found a genetic cause for a disease or condition.
Brucella total antibody titer of greater than or equal to 1:160 by standard tube agglutination test (SAT) or Brucella microagglutination test (BMAT) in one or more serum specimens obtained after onset of symptoms Detection of Brucella DNA in a clinical specimen by PCR assay NOTE: Evidence of Brucella antibodies by nonagglutination-based tests
Clinical Testing and Diagnosis for Tuberculosis - CDC
Dec 10, 2024 · 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.
Diagnosing von Willebrand Disease | Von Willebrand Disease …
May 15, 2024 · This test also measures the time it takes for blood to clot. It measures primarily the clotting ability of factors I (1), II (2), V (5), VII (7), and X (10). If the level of any one of these factors is too low, it will take longer than normal for the blood to clot. The results of this test will be normal among most people with VWD. Fibrinogen test
Laboratory Testing for Epstein-Barr Virus (EBV)
Apr 10, 2024 · 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.
Guidelines and Recommendations | HIV Partners | CDC
Feb 27, 2025 · The 2017 technical update provides information on the use of the Alere Determine HIV 1/2 Ag/Ab Combo single use rapid test (Determine) in laboratories where it is not feasible to conduct an instrumented antigen/antibody test as the initial test in the algorithm.
Clinical Testing Guidance for Tuberculosis: Tuberculin Skin Test
Jan 31, 2025 · 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 Genital Herpes | Genital Herpes | CDC
Feb 20, 2024 · 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
Diagnosing Tuberculosis | Tuberculosis (TB) | CDC
Jan 17, 2025 · Understanding TB blood test or TB skin test results. A positive test result for TB infection means you have TB germs in your body. Your health care provider will do other tests to determine if you have inactive TB or active TB disease. These tests may include a chest x-ray, and a test of the sputum (phlegm) you cough up.