THE EFFECT OF SALMONELLA ENTERITIDIS INFECTION ON IMMUNE RESPONSE AGAINST NEWCASTLE DISEASE (ND) IN CHICKENS

Document Type : Original Article

Authors

1 Dept. of Res & Diag. of Avian dis., Animal Health research Institute, Dokki, Egypt.

2 Dept. of Bacteriology (Serology Unit) Animal Health Research Institute, Dokki, Egypt.

Abstract

 
The relationship between chronic infection with Salmonella enteritidis in chickens and the immune response against ND vaccination using Hitchner B1 vaccine was studied. Sal. ent. infection proved to have an immunosuppressive effect on the immune response against ND considering postmortem lesions, seroconversion, histopathological changes and mortalities after VVNDV challenge as Criteria.