Article (Scientific journals)
Production of Bovine Herpesvirus Type 1-Seronegative Latent Carriers by Administration of a Live-Attenuated Vaccine in Passively Immunized Calves
Lemaire, Mylène; Meyer, Gilles; Baranowski, Eric et al.
2000In Journal of Clinical Microbiology, 38 (11), p. 4233-8
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Abstract :
[en] The consequences of the vaccination of neonatal calves with the widely used live-attenuated temperature-sensitive (ts) bovine herpesvirus type 1 (BHV-1) were investigated. The ts strain established acute and latent infections in all vaccinated calves either with or without passive immunity. Four of seven calves vaccinated under passive immunity became clearly BHV-1 seronegative by different serological tests, as did uninfected control calves after the disappearance of maternal antibodies, and they remained so for long periods. A cell-mediated immune response was detected by a BHV-1 gamma interferon assay, but this test failed to detect the seronegative latent carriers (SNLCs). While they are not detected, SNLCs represent a threat for BHV-1-free herds or countries. This study demonstrates that SNLCs can be easily obtained by inoculation with a live-attenuated BHV-1 under passive immunity and that latent carrier animals without any antibody do exist. Consequently, this situation could represent a good model to experimentally produce SNLCs.
Disciplines :
Microbiology
Veterinary medicine & animal health
Author, co-author :
Lemaire, Mylène
Meyer, Gilles
Baranowski, Eric
Schynts, Frédéric
Wellemans, Guy
Kerkhofs, Pierre
Thiry, Etienne ;  Université de Liège - ULiège > Département des maladies infectieuses et parasitaires > Virologie, épidémiologie et pathologie des maladies virales
Language :
English
Title :
Production of Bovine Herpesvirus Type 1-Seronegative Latent Carriers by Administration of a Live-Attenuated Vaccine in Passively Immunized Calves
Publication date :
November 2000
Journal title :
Journal of Clinical Microbiology
ISSN :
0095-1137
eISSN :
1098-660X
Publisher :
American Society for Microbiology, Washington, United States - District of Columbia
Volume :
38
Issue :
11
Pages :
4233-8
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 04 March 2009

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