Article (Scientific journals)
Establishment of Latency Associated with Glycoprotein E (Ge) Seroconversion after Bovine Herpesvirus 1 Infection in Calves with High Levels of Passive Antibodies Lacking Ge Antibodies
Schynts, F.; Lemaire, Mylène; Ros, C. et al.
2001In Veterinary Microbiology, 82 (3), p. 211-22
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Abstract :
[en] This study was conducted to investigate the glycoprotein E (gE) antibody response raised after inoculation with a low infectious dose of bovine herpesvirus 1 (BHV-1) in six calves possessing high levels of passive immunity from cows repeatedly vaccinated with gE deleted marker vaccine. Four out of the six calves developed gE antibodies 3-5 weeks after infection, whereas the two other ones remained seronegative to gE. After 5 months of infection, the six calves were treated with dexamethasone. Virus was only re-excreted by the four calves which previously seroconverted against gE. The two other calves became seronegative against BHV-1, 30-32 weeks after infection. A second dexamethasone treatment performed 11 months after infection failed to demonstrate a latent infection in these two calves. Moreover, the lack of identification of a cell-mediated immune response, after the two dexamethasone treatments, and the failure to detect BHV-1 DNA sequences in trigeminal ganglia strongly suggest that these two calves were not latently infected. In conclusion, the presence of high levels of maternal immunity lacking gE antibodies does not prevent latency after infection with a low titre of BHV-1. Moreover, latency is associated with a serological response to gE. These results confirm that the gE deletion is a good marker to identify young calves latently infected with a field virus.
Disciplines :
Microbiology
Veterinary medicine & animal health
Author, co-author :
Schynts, F.
Lemaire, Mylène
Ros, C.
Belak, S.
Thiry, Etienne ;  Université de Liège - ULiège > Département des maladies infectieuses et parasitaires > Virologie, épidémiologie et pathologie des maladies virales
Language :
English
Title :
Establishment of Latency Associated with Glycoprotein E (Ge) Seroconversion after Bovine Herpesvirus 1 Infection in Calves with High Levels of Passive Antibodies Lacking Ge Antibodies
Publication date :
28 September 2001
Journal title :
Veterinary Microbiology
ISSN :
0378-1135
eISSN :
1873-2542
Publisher :
Elsevier, Netherlands
Volume :
82
Issue :
3
Pages :
211-22
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 04 March 2009

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