Exploring the ELISA Technique for Antibody Measurement

The video explains the enzyme-linked immunosorbent assay (ELISA), a method for serologic testing. It describes the process of coating wells with antigens, adding patient serum, and detecting antibodies. The video details the washing steps to remove unbound antibodies and the addition of enzyme-conjugated antibodies. Finally, it covers the color development process and how to determine the titer, which is the highest dilution with visible color.

What is the primary purpose of the ELISA test?

• To measure blood pressure

• To determine blood type

• To measure glucose levels

• To test for the presence of specific antibodies

In what type of plates are ELISA serologies usually performed?

• Test tubes

• Beakers

• Multi-well microtiter plates

• Petri dishes

What is coated on the wells of the plate to begin the ELISA test?

• Antigens

• Antibodies

• Serum

• Enzymes

What binds to the antigen fixed to the bottom of the wells if present in the patient's serum?

• Substrates

• Enzymes

• Antigens

• Antibodies

What is added after washing out unbound antibodies?

• A solution of an animal antibody against human antibodies

• A solution of human antibodies

• A solution of antigens

• A solution of enzymes

What generates the visible color in the ELISA test?

• The interaction of the substrate with the antigen

• The interaction of the substrate with the enzyme on the second antibody

• The interaction of the substrate with the patient's serum

• The interaction of the enzyme with the antigen

How is the titer determined in an ELISA test?

• By the lowest dilution with color development

• By the lowest dilution with no color development

• By the highest dilution with no color development

• By the highest dilution with definite color development