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      Question

      Newcastle disease/Ranikhet disease (RD) is a highly

      contagious and most lethal viral disease of poultry. Which Institute had discovered the vaccine for Ranikhet disease?
      A NDRI Correct Answer Incorrect Answer
      B IVRI Correct Answer Incorrect Answer
      C IRRI Correct Answer Incorrect Answer
      D IARI Correct Answer Incorrect Answer
      E None Correct Answer Incorrect Answer

      Solution

      ICAR-IVRI, Izatnagar produced R2B strain vaccine since 1940 and F strain vaccine since 1953. The immunity produced by RD F vaccine lasts for about 15 weeks. Chicks should be revaccinated with the RD R2B vaccine between 8-10 weeks after primary vaccination.

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