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 hum oral immune responses of chicken to these vaccines were evaluated by using lymphocytes blast genesis assay, haemagglutination-inhibition, serum neutralization, 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 crazy.