Preparation of a trivalent oil-emulsion vaccine of inactivated newcastle disease virus, infectious bronchitis virus and haemophilus paragallinarum

الملخص EN

Monovalent inactivated oil-emulsion, Newcastle disease virus (NDV), infectious bronchitis virus (IBV) and Hemophilic paragallinarum vaccines as well as a trivalent one (NDV + IBV + HP) were prepared.

The cellular and humeral immune responses of chicken to these vaccines were evaluated by using lymphocytes blast genesis assay, haemagglutination-inhibition, serum neutralization, and tube agglutination and challenge tests.

The results showed that the trivalent vaccine was safe, efficient as monovalent vaccines and protected chicken against Newcastle, Infectious bronchitis and infectious coryza.