Recording-2025-02-05T22:42:29.746Z

The slight agglutination test is utilized in blood typing.
It indicates whether specific antibodies and corresponding antigens are present in a sample.

ELISA stands for Enzyme-Linked Immunosorbent Assay.
It is a serological test that is quick, accurate, and widely used for identifying specific antigens or antibodies in a sample.
ELISA can be performed on a microplate with small wells, typically the size of a palm.

Preparation of Wells
- Each well of the microplate is coated with specific antibodies against certain antigens.
- While this example describes one antibody, multiple antibodies may be present in practice for different targets.
Adding Patient Samples
- A patient sample, containing potential antigens, is added to the wells.
- If the antigen matches the antibodies on the well's bottom, binding occurs.
Introducing Enzyme-Linked Antibody
- An enzyme-linked antibody is added that will also bind to the same antigen.
- This antibody is designed to produce a measurable signal.
Application of Substrate
- A substrate for the enzyme is introduced, leading to the production of a color change if the binding has been successful.
- The reaction typically completes in about 5 to 10 minutes.
- The appearance of color indicates the presence of the specific antigen in the patient sample.

ELISA is effective, particularly when the doctor is uncertain about the specific microbe involved.
The test can allow for simultaneous testing of multiple microbes—up to 96 in one test, as each well can contain different antibodies for various antigens.
This method significantly streamlines the diagnostic process in clinical laboratories.

Some testing machines enable high-throughput testing, allowing numerous tests to be conducted simultaneously based on the arrangement of antibodies and antigens.
These systems often show varying pairings and sizes for improved diagnostic accuracy.