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The serological response and long-lasting resistance against infection with louping-ill virus in sheep immunized with a highly attenuated tick-borne encephalitis virus

Published online by Cambridge University Press:  15 May 2009

V. Mayer ,
D. Blaškovič ,
E. Ernek  and
H. Libíková
V. Mayer
Affiliation:
The Institute of Virology, Slovak Academy of Sciences, Bratislava
D. Blaškovič
Affiliation:
The Institute of Virology, Slovak Academy of Sciences, Bratislava
E. Ernek
Affiliation:
The Institute of Virology, Slovak Academy of Sciences, Bratislava
H. Libíková
Affiliation:
The Institute of Virology, Slovak Academy of Sciences, Bratislava
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Summary

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The vaccination of sheep with one dose of the monkey-and mouse-attenuated tick-borne encephalitis virus (the Hy-HK 28 ‘2’ clone) causes seroconversion from negative into positive in 85% of animals. In sheep with pre-existing virus-neutralizing antibodies and increas of their titres was observed in 81%. The antibodies persisted for at least 12 months after the vaccination and during the summer period of grazing the number of serologically positive animals even increased.

The vaccinated animals, in contrast to the non-immune control sheep, developed no viraemia after challenge with the virulent louping-ill virus, performed 11 months after immunization.

Type
Research Article
Information
Journal of Hygiene , Volume 67 , Issue 4 , December 1969 , pp. 731 - 738
Copyright
Copyright © Cambridge University Press 1969

References

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