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Protective efficacy of the Newcastle disease virus genotype VII–matched vaccine in commercial layers

Published: September 9, 2020

Summary

INTRODUCTION Newcastle disease virus (NDV) is Avian avulavirus type-1 that belongs to the genus Avulavirus of the family Paramyxoviridae (Swayne and Glisson, 2013). Newcastle disease virus isolates vary in their pathogenicity to chickens and may include at least 3 pathotypes; lento-genic (low virulence), mesogenic (moderate virulence), and velogenic (high virulence). Velogenic NDV remain a maj...

Related topics:

#Poultry vaccines

#Newcastle disease

Authors:

Shaimaa Mohamed Talaat

Wael Elfeil

Mohamed A.hassan Kutkat

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Comment

Sayed Mohammad Mortazavi

9 de octubre de 2020

Thank you for this valuable article, I would like to know the age for the injection. The other question is about the using of a live vaccine with the inactivated vaccine? Generally, we use a mild live vaccine wit the inactivated vaccines at the first day in our farms in Iran.

with the best,

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Wael Elfeil

10 de octubre de 2020

Sayed Mohammad Mortazavi
Greetings.
Regarding layers flocks, it is preferable to use multiple doses from live and inactivated vaccines, based on the epidemiology of each area:
if the epidemiological situation high, it preferable to use 3-4 inactivated sose along with 3-5 live doses (starting from first week of life then repeated each 3-4 weeks till start production
if the epidemiological situation is not high; use less number of doses, better to combined live and inactivated ND vaccine
if you have additional question, let me know
Regards,
Wael.

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