two advantages are you don't need to use radioactive substances and it five accurate results
highly sensitive and specific
not needing radioisotopes (radioactive substances) or a costly radiation counter (a radiation-counting apparatus)
it can be difficult to develop an ELISA and the micro titre plates cannot be reused as the Abs bind to the surface and are difficult to remove.
Specificity varies by target; over all very good, but not great specificity
Measures exposure and vaccine response, but not acute infection. For example, once a bird is ELISA Ab positive, the infection is probably over.
The western blot test
In the Indirect ELISA ,An antigen is added to the microtiter plate well and the antigen attaches to the walls of the microtiter plate.After rinsing to remove excess antigen, the serum suspected of containing the antibodies is added.Enzyme-linked antibody capable of reacting with the constant region of other antibodies is the added, followed by addition of the colorless substrate. Development of color indicates the presence of the antibody being identified.
Elisa means "consecrated to God"
It has many reason that may be possible. 1. Stability of Elisa kit. 2. Type of Elisa kit ... Example. Rat IL-1 must use with cell rat .... but can use with the other depend cross reactivity of Elisa kit. 3. Right method will show good standard curve. (r2 almost 1 ) if not it's wrong. 4. The concentration used of treated in cell is not appropiate .
an Enzyme Linked immunosorbent assay. during an infection an individual mounts an antibody response which eventually results in production of plasma IgG molecules that bind to various parts of the infectious agent. If these antibodies are present in the sample they will bind to the adsorbed antiagen and remain there after washing and will be detected by the ELISA technique.
The ELISA test is usually the first test given; quick results and inexpensive. See the related link.
Western Blot Test: is a blood test that produces more accurate results than the ELISA test.
Indirect is used to test for ANTIBODIES and direct is used to test for ANTIGENS. For example, Indirect ELISA is used to test for HIV antibodies.
There is only one test that can give the accurate results for HIV. The only test that can do this would be the Elisa test.
elisa
The AGID test is the agar gel immunodiffusion test and ELISA is the enzyme-linked immunosorbent assay. Both test for the presence of certain proteins (called antigens) by binding them with antibodies.
An Elisa Test is used to test for a substance using antibodies for colour change. The test has been used in medicine and plants. Performing the test involves using an antibody and enzymes.
Nothing is better then ELISA and CLIA methodology, NAT testing also does not eliminate the window period but only reduces it. The cost is much higher then ELISA updated: western blot test
western blot test
The western blot test
antigen
The first test licensed for HIV testing was the ELISA test in 1985. ELISA detects antobodies to the HIV virus, which indicates that the person has been exposed to the virus.