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Preliminary trials for preparation of a bivalent inactivated vaccine against newcastle disease and egg drop syndrome [electronic resource].

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Abo-Zaid, Abo-Zaid A

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Language: English Summary language: Arabic Description: p.193-203Other title:

محاولات مبدئية لتحضير لقاح ثنائى ميت ضد مرض النيوكاسل وظاهرة انخفاض البيض [Added title page title]

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Beni-Suef veterinary medical journal, 2001 v. 11 (2A) [electronic resource].

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In: Beni-Suef Veterinary Medical Journal 2001.v. 11(2A)Summary: Inactivated oil monovalent Newcastle disease(ND) and egg drop Syndrome (EDS) vaccines as well as an inactivated bivalent (ND and EDS) vaccine were prepared in the present study and evaluated according to the directions of the recommended protocols of poultry vaccines. Such vaccines were found to be free from foreign contaminants, safe and immunogenic for chicken. The protective activity of the bivalent vaccine was compared to that of monovalent vaccines in different groups of chicken vaccinated against ND and EDS using monovalent and bivalent vaccines and compared with the imported bivalent vaccine (ND and EDS). Serologically, it was found that all vaccinated chickens had protective levels of humoral antibodies against ND and EDS either with the use of monovalent or bivalent vaccines without showing any antagonizing effect between the immune response of chicken to ND and EDS.

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Inactivated oil monovalent Newcastle disease(ND) and egg drop Syndrome (EDS) vaccines as well as an inactivated bivalent (ND and EDS) vaccine were prepared in the present study and evaluated according to the directions of the recommended protocols of poultry vaccines. Such vaccines were found to be free from foreign contaminants, safe and immunogenic for chicken. The protective activity of the bivalent vaccine was compared to that of monovalent vaccines in different groups of chicken vaccinated against ND and EDS using monovalent and bivalent vaccines and compared with the imported bivalent vaccine (ND and EDS). Serologically, it was found that all vaccinated chickens had protective levels of humoral antibodies against ND and EDS either with the use of monovalent or bivalent vaccines without showing any antagonizing effect between the immune response of chicken to ND and EDS.

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