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Response to foot-and-mouth disease vaccines in newborn calves. Influence of age, colostral antibodies and adjuvants*

Published online by Cambridge University Press:  19 October 2009

A. M. Sadir
Affiliation:
Department of Virology, Centro de Investigaciones en Ciencias Veterinarias, Institute Nacional de Tecnología Agropecuaria, Castelar
A. A. Schudel
Affiliation:
Department of Virology, Centro de Investigaciones en Ciencias Veterinarias, Institute Nacional de Tecnología Agropecuaria, Castelar
O. Laporte
Affiliation:
Department of Virology, Centro de Investigaciones en Ciencias Veterinarias, Institute Nacional de Tecnología Agropecuaria, Castelar
M. Braun
Affiliation:
Cátedra de Inmunologia, Facultad de Ciencias Veterinarias, Universidad de Buenos Aires, Argentina
R. A. Margni
Affiliation:
Cátedra de Inmunología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina
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Oil-emulsified (OE) and aqueous (Aq) vaccines were prepared with the same batch of inactivated A24 8345 foot and mouth disease virus (FMDV). Calves born to vaccinated dams did not respond to the Aq vaccine 30 or 90 days post partum. When the OE vaccine was used on a similar group of calves, no responses were elicited up to 21 days post partum. However, calves 30 or more days old responded like adult cattle to the OE vaccine. When the OE vaccine was used in colostral antibody-free calves 3–30 days old, all animals showed good antibody responses but, in calves vaccinated 3 or 7 days post partum, antibodies were detectable only after a considerable period of time. Our results show that both passively acquired colostral antibodies and age are important in the response of very young calves to FMDV oil vaccines. From a practical point of view, in endemic areas where adult cattle are periodically vaccinated, vaccination of calves between 30 and 60 days post partum with OE vaccines would lead to high levels of herd protection.

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Type
Research Article
Copyright
Copyright © Cambridge University Press 1988