Testing for COVID-19 | COVID-19 | CDC - Centers for Disease …
2024年8月24日 · 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
Overview of Testing for SARS-CoV-2 | COVID-19 | CDC
2024年8月29日 · 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 ...
Overview of Influenza Testing Methods | Influenza (Flu) | CDC
2024年8月8日 · The post-test probability or predictive values (positive and negative predictive values) of an influenza virus test depend upon the prevalence of circulating seasonal influenza viruses in the patient population, and the specific test characteristics (sensitivity and specificity) compared to a "gold standard" comparison test (molecular assay or ...
Testing for Tuberculosis | Tuberculosis (TB) | CDC
2024年6月17日 · 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.
Clinical Testing Guidance for Tuberculosis: Tuberculin Skin Test
2024年5月14日 · 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.
What You Can Do to Test for Fentanyl | Stop Overdose | CDC
2024年4月2日 · Fentanyl test strips (FTS) are a low-cost harm reduction tool that can be used to prevent overdoses in combination with other strategies. FTS are small strips of paper that can detect the presence of fentanyl in different kinds of drugs (cocaine, methamphetamine, heroin, etc.) and drug forms (pills, powder, and injectables). 1
Take the Test - Prediabetes | Diabetes | CDC
2022年9月22日 · Centers for Disease Control and Prevention. CDC twenty four seven. Saving Lives, Protecting People
Testing and Diagnosis for Lyme disease | Lyme Disease | CDC
2024年5月15日 · Because the immune system continues to make the antibodies for months or years after an infection is gone, your blood test will remain positive after the bacteria are no longer present. Unfortunately, these antibodies don’t reliably prevent re-infection should you be bitten by another infected tick. About tickborne co-infections
Diagnosing Pinworms | Pinworm Infection | CDC
2024年2月20日 · Conduct a "tape test". Press the sticky side of clear tape against the skin near the anus to collect pinworm eggs. First thing in the morning is the best time, before the person washes, goes to the bathroom, or gets dressed. Do this three mornings in a row. Put the tape in a sealed container, a zipping bag, or provided specimen container for ...
Waived Tests | Laboratory Quality | CDC
2024年9月11日 · Waived tests include test systems cleared by the FDA for home use and those approved for waiver under the CLIA criteria. While CLIA requires waived tests to be simple and low-risk, they are not completely error-proof. Errors can occur in testing if manufacturer's instructions are not followed or if personnel are unfamiliar with the test system.
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