What is a common method used to detect exposure to viral pathogens?

What is a common method used to detect exposure to viral pathogens?

• A. Microbial colony counts
• B. Gel electrophoresis
• C. ELISA
• D. All of the above

Answer: (C)

Detecting exposure to viral pathogens is best done by looking for evidence of an immune response or viral components in a sample. ELISA fits this need because it is an immunoassay that detects either antibodies against a virus in a person’s blood or viral antigens in a sample. The test uses antigen-antibody binding and an enzyme-linked detector that produces a color signal, which can be measured to indicate exposure. It is highly sensitive, scalable, and can screen many samples quickly and at relatively low cost. Importantly, it does not require handling live virus, which adds safety and practicality for routine surveillance. Microbial colony counts focus on growing bacteria or fungi on culture plates, which isn’t a direct measure of exposure to viruses. Gel electrophoresis separates nucleic acids or proteins and can be used to study viral genomes or proteins, but it isn’t the standard, high-throughput method used to determine exposure in individuals. So ELISA stands out as the common, practical choice for detecting exposure to viral pathogens.

Detecting exposure to viral pathogens is best done by looking for evidence of an immune response or viral components in a sample. ELISA fits this need because it is an immunoassay that detects either antibodies against a virus in a person’s blood or viral antigens in a sample. The test uses antigen-antibody binding and an enzyme-linked detector that produces a color signal, which can be measured to indicate exposure. It is highly sensitive, scalable, and can screen many samples quickly and at relatively low cost. Importantly, it does not require handling live virus, which adds safety and practicality for routine surveillance.

Microbial colony counts focus on growing bacteria or fungi on culture plates, which isn’t a direct measure of exposure to viruses. Gel electrophoresis separates nucleic acids or proteins and can be used to study viral genomes or proteins, but it isn’t the standard, high-throughput method used to determine exposure in individuals. So ELISA stands out as the common, practical choice for detecting exposure to viral pathogens.