Tissue Culture Techniques-2 and CPE in Veterinary Medicine
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Questions and Answers

What is the purpose of incubating the cells with daily observation till appearance of complete CPE?

  • To confirm the presence of virus in the culture (correct)
  • To ensure the virus is harvested at the right time
  • To speed up the process of cell growth
  • To prepare the cells for subculture
  • What is the key step to harvest the virus after 70% CPE?

  • Incubating at 37°C for 3-7 days
  • Decanting the growth medium from the culture vessels
  • Applying three cycles of freezing and thawing on infected cells (correct)
  • Washing the cell monolayer with sterile PBS
  • What is the purpose of adding maintenance medium after removing the inoculum?

  • To provide nutrients for cell growth (correct)
  • To wash the cell monolayer
  • To prevent contamination
  • To stimulate cell division
  • What is the significance of incubating the vessels at 37°C for 1-2 hours with gentle tilting every 10 minutes?

    <p>To ensure even distribution of the virus on the cell monolayer</p> Signup and view all the answers

    Why is it important to preserve the supernatant fluid containing the virus by ultra deep freezer?

    <p>To prevent degradation of the virus</p> Signup and view all the answers

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