ELISA can detect which of the following?

ELISA can detect which of the following?

• A. Antibodies or Antigen
• B. Viruses Only
• C. Only Antigens
• D. Bacteria Only

Answer: (A)

ELISA detects specific molecules through antigen–antibody binding with an enzyme that produces a color change for measurement. Depending on how the test is set up, you can either detect antibodies that are present in a sample (indirect ELISA) or detect the presence of an antigen (such as a viral or bacterial protein) in the sample (sandwich/direct ELISA). This versatility is why ELISA isn’t limited to viruses or bacteria alone; it can reveal antibodies produced by the immune system or the actual antigens from a pathogen or other sources. That’s why the correct choice is that ELISA can detect antibodies or antigens. The other options are too restrictive: ELISA isn’t limited to viruses, nor to antigens only or to bacteria only.

ELISA detects specific molecules through antigen–antibody binding with an enzyme that produces a color change for measurement. Depending on how the test is set up, you can either detect antibodies that are present in a sample (indirect ELISA) or detect the presence of an antigen (such as a viral or bacterial protein) in the sample (sandwich/direct ELISA). This versatility is why ELISA isn’t limited to viruses or bacteria alone; it can reveal antibodies produced by the immune system or the actual antigens from a pathogen or other sources.

That’s why the correct choice is that ELISA can detect antibodies or antigens. The other options are too restrictive: ELISA isn’t limited to viruses, nor to antigens only or to bacteria only.