Avian Influenza-Killed Vaccine on Tissue Distribution and Shedding of Avian Influenza Virus H9N2 in Ducklings.

ABSTRACT: Ducks play an important role in the transmission of avian influenza to poultry farms. Because of the importance of vaccination in reducing virus shedding, this study evaluated avian influenza-killed vaccine H9N2 on tissue distribution and shedding of avian influenza virus H9N2 in ducklings. One hundred-day-old ducklings were purchased and, after bleeding from 20 birds, were kept in four separate rooms under standard conditions. Groups 1 and 2 were vaccinated at 9 days, and groups 2 and 3 were challenged with 0.1 ml of allantoic fluid containing 10⁵ EID₅₀ (A/chicken/Iran/Aid/2013(H9)) virus intranasally at 30 days. Group 4 chicks were kept as the control group. Chicks were observed two times daily. On days 1, 3, 5, and 8 after inoculation, 3 chicks were randomly select

SUBMITTER: Abdi HM 

PROVIDER: S-EPMC8605842 | biostudies-literature | 2021

REPOSITORIES: biostudies-literature