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Influence of ND maternal antibody on the efficiency of ND vaccine in chickens

Zhao Zhan-min

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Abstract

This experiment's aim is to evaluate the influence of ND maternal antibody in chicken's immune effect to different kinds of ND vaccines at different ages by using HA and HI test.The results show that the maternal antibody has much more influence on chicken's immune effect to ND vaccine.When the maternal antibody reduce to a certain level(3 log2,15～20 days later),the immune effect could be satisfied,especially by using the live vaccine and oil-emulsion vaccine at the same time.The ND maternal antibody has more distinet inpluence on immune eppect in younger chicken by using of oil-emalsion vaccine.The favorite age at which the chicken is vaccinated with oil-emulsion vaccine is elder than 8～10 dyas.This results provide a new theory for ND immune program.

About this research paper

What this paper is about

This experiment's aim is to evaluate the influence of ND maternal antibody in chicken's immune effect to different kinds of ND vaccines at different ages by using HA and HI test.The results show that the maternal antibody has much more influence on chicken's immune effect to ND vaccine.When the maternal antibody reduce to a certain level(3 log2,15～20 days later),the immune effect could be satisfied,especially by using the live vaccine and oil-emulsion vaccine at the same time.The ND maternal antibody has more distinet inpluence on immune eppect in younger chicken by using of oil-emalsion vaccine.The favorite age at which the chicken is vaccinated with oil-emulsion vaccine is elder than 8～10 dyas.This results provide a new theory for ND immune program.

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Method / approach

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Available abstract

This experiment's aim is to evaluate the influence of ND maternal antibody in chicken's immune effect to different kinds of ND vaccines at different ages by using HA and HI test.The results show that the maternal antibody has much more influence on chicken's immune effect to ND vaccine.When the maternal antibody reduce to a certain level(3 log2,15～20 days later),the immune effect could be satisfied,especially by using the live vaccine and oil-emulsion vaccine at the same time.The ND maternal antibody has more distinet inpluence on immune eppect in younger chicken by using of oil-emalsion vaccine.The favorite age at which the chicken is vaccinated with oil-emulsion vaccine is elder than 8～10 dyas.This results provide a new theory for ND immune program.

Key concepts: Immune system, Antibody, Vaccination, Inactivated vaccine, Immunity, Biology, Immunology, Medicine

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