Interaction between avian influenza subtype H9N2 and Newcastle disease virus vaccine strain (LaSota) in chickens.

ABSTRACT:

Background

H9N2 avian influenza virus is endemic in Egyptian poultry flocks. The role of the live viral vaccines such as LaSota in exaggeration of the clinical picture of H9N2 infection under field conditions is significantly important leading to severe economic losses due to higher mortality and lower growth performance. This experiment was designed to identify the possible interaction between experimental infection with H9N2 virus and NDV live vaccine (LaSota strain) in broiler chickens. Six groups each of 20 broiler chicks were used. Three groups (G1-3) were infected with H9N2 and vaccinated with LaSota, 3 days before, at the same day or 3 days post vaccination (dpv), while the remaining groups (G4-6) were non-vaccinated infected, vaccinated non-infected and non-vaccinated non-i

SUBMITTER: Ellakany HF 

PROVIDER: S-EPMC6245631 | biostudies-literature | 2018 Nov

REPOSITORIES: biostudies-literature