Question

ELISA EIA First test available since ____ Most common testing method is the use of ELISA test on a sample of _____ drawn from a ____, followed up with a confirmatory test ( ____ ___) on the ____ sample * can also use ___ fluid or ____ sample

A) 1971, blood, vein, Western blot, same
B) 1980, saliva, mouth, PCR, different
C) 1960, urine, bladder, RIA, similar
D) 1995, cerebrospinal, spine, ELIFA, adjacent

Answer 1

The first enzyme immunoassay (EIA), widely known as ELISA, was available in 1980. It is primarily performed using a blood sample from a vein, with a Western blot used as a confirmatory test.

Step-by-step explanation:

The first enzyme immunoassay (EIA), also known as ELISA (enzyme-linked immunosorbent assay), became available in 1980. The most common method for initial HIV testing includes the use of an EIA or ELISA test on a sample of blood drawn from a vein, followed by a confirmatory test, notably the Western blot, on the same blood sample. Alternate samples for ELISA might include saliva or urine. The ELISA test is often followed by a confirmatory test, such as the western blot or PCR. ELISA tests rely on antibodies to detect antigens with high specificity. When a sample contains the antigen, the test yields a color change indicating a positive result, which then often requires confirmation with more sensitive tests such as Western blot or nucleic acid amplification test (NAAT).