Keywords :
Animals; Antibodies, Viral/analysis; Cattle; Herpesvirus 1, Bovine/growth & development/immunology; Infectious Bovine Rhinotracheitis/immunology/microbiology; Neutralization Tests; Stress, Physiological/microbiology; Time Factors; Transportation; Viral Vaccines/immunology; Virus Replication
Abstract :
[en] Transport was studied as a cause of reactivation of infectious bovine rhinotracheitis virus (Bovine herpesvirus-1; BHV-1) in heifers vaccinated 2-6 months before transport, using a double dose of the thermosensitive (ts) vaccine strain (Tracherine). Eight out of 19 animals showed ts strain re-excretion over a period of 1-3 days, beginning, in 5 out of the 8 heifers, the day after transport. In 14 other heifers, only sera were examined by sero-neutralisation: only 1 out of these 14 animals showed a rise in BHV-1 neutralising antibodies. Transport can therefore be considered as a stimulus of BHV-1 reactivation.
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