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Rotavirus. A nucleic acid test (NAT) is a technique used to detect a particular nucleic acid sequence and thus usually to detect and identify a particular species or subspecies of organism, often a virus or bacterium that acts as a pathogen in blood, tissue, urine, etc. NATs differ from other tests in that they detect genetic materials (RNA or DNA) rather than antigens or antibodies.
In the past nucleic acid tests have mainly been used as a secondary test to confirm positive serological results. [3] However, as they become cheaper and more automated, they are increasingly becoming the primary tool for diagnostics and can also be use for monitoring of treatment of viral infected individuals t.
For nucleic acid tests, like the viral load blood test, it can take anywhere from 10–33 days for the test to provide an accurate result. If an individual's first HIV test is positive, it is recommended for them to take a second test to confirm the results. If this follow-up test is also positive, an HIV positive diagnosis can likely be made. [14]
Nucleic-acid-based tests amplify and detect one or more of several target sequences located in specific HIV genes, such as HIV-I GAG, HIV-II GAG, HIV-env, or the HIV-pol. [33] [34] Since these tests are relatively expensive, the blood is screened by first pooling some 8–24 samples and testing these together; if the pool tests positive, each ...
Mar. 14—Hepatitis C is a liver infection caused by the hepatitis C virus. It is becoming a big public health concern in many counties, including Lawrence County, encouraging us to review some ...
It produces test results in 5 minutes using its ID NOW portable testing system. [1] It also received EUA for its m2000-based laboratory nucleic acid test for COVID-19. [2] In April 2020, Abbott received EUA for its ARCHITECT IgG laboratory antibody test for COVID-19. [3] Also in April, Abbott's ID NOW test was reported to have sensitivity of 85 ...
Worldwide hepatitis C is the cause of 27% of cirrhosis cases and 25% of hepatocellular carcinoma. [24] About 10–30% of those infected develop cirrhosis over 30 years. [5] [16] Cirrhosis is more common in those also infected with hepatitis B, schistosoma, or HIV, in alcoholics, and in those of male sex. [16]
Non-reactive (negative) tests are followed up with nucleic acid tests for viral RNA. [ 27 ] About 70-80% of people infected with HIV will experience symptoms during the seroconversion period within about two to four weeks, primarily associated with a high viral load and the immune system's acute response to the infection. [ 25 ]