Fluorescence Assay Methodology

This video tutorial explains a methodology to assess the susceptibility of influenza A and B viruses to neuraminidase inhibitors using a fluorescence-based assay. It covers the preparation of the virus, the principle of the assay, and the detailed procedure for conducting the assay, including virus dilution, incubation, and reaction termination. The goal is to determine if the virus is resistant or sensitive to antiviral drugs.

What is the main goal of the methodology discussed in the video?

• To identify new strains of influenza viruses

• To develop a vaccine for influenza viruses

• To assess the susceptibility of influenza viruses to neuraminidase inhibitors

• To study the genetic makeup of influenza viruses

What is the primary principle of the fluorescence-based assay?

• To determine the genetic sequence of the virus

• To observe if the neuraminidase inhibitor blocks enzyme activity

• To measure the growth rate of influenza viruses

• To calculate the mutation rate of the virus

Before testing susceptibility, what must be done to the virus?

• It must be genetically modified

• It must be grown to a high viral titer

• It must be frozen

• It must be mixed with other viruses

What type of plate is used to begin the assay?

• A 12-well square plate

• A 24-well flat-bottom plate

• A 48-well round-bottom plate

• A 96-well U-bottom plate

How are the dilutions performed across the plate?

• Two-fold dilutions

• Ten-fold dilutions

• Three-fold dilutions

• Five-fold dilutions

What is added to each well after transferring samples to a new plate?

• 100 microliters of water

• 50 microliters of 300 micromolar munona

• 200 microliters of buffer solution

• 10 microliters of enzyme

What is the purpose of using a plate sealer in the assay?

• To increase reaction speed

• To prevent evaporation

• To prevent contamination

• To enhance fluorescence

At what temperature is the plate incubated during the assay?

• 25 degrees Celsius

• 50 degrees Celsius

• 37 degrees Celsius

• 4 degrees Celsius

What is the final step in the assay procedure?

• Adding a start solution

• Adding a stop solution

• Freezing the samples

• Heating the samples