  Reactivation of infectious bovine rhinotracheitis virus by transport.Thiry, Etienne  ; ; et alin Comparative Immunology, Microbiology and Infectious Diseases (1987), 10(1), 59-63 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 ... [more ▼] 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. [less ▲] Detailed reference viewed: 10 (0 ULg)Studies on conditions necessary for Bovine herpesvirus 1 reactivationThiry, Etienne ; ; et alin Pastoret, Paul-Pierre; Thiry, Etienne; Saliki, J. (Eds.) Immunity to herpesvirus infections of domestic animals (1985) Detailed reference viewed: 5 (0 ULg)La peste porcine africaine; Thiry, Etienne ; Pastoret, Paul-Pierre in Annales de Médecine Vétérinaire (1985), 129 Detailed reference viewed: 13 (0 ULg)Excretion and reexcretion of thermosensitive and wild-type strains of infectious bovine rhinotracheitis virus after co-infection or two successive infections.Thiry, Etienne ; ; et alin Veterinary Microbiology (1985), 10(4), 371-80 Twelve cattle were divided into 2 groups. The first was intranasally co-infected with 2 strains of infectious bovine rhinotracheitis virus (Bovine herpesvirus 1; BHV 1): the thermosensitive vaccine strain ... [more ▼] Twelve cattle were divided into 2 groups. The first was intranasally co-infected with 2 strains of infectious bovine rhinotracheitis virus (Bovine herpesvirus 1; BHV 1): the thermosensitive vaccine strain IBR/ts RLB106 and a Belgian field isolate IBR/Cu5. Reactivation of BHV 1 was induced by dexamethasone treatment 2 months later and again 5 months later for 3 animals that only reexcreted small quantities of virus during the first dexamethasone treatment. The second group was intranasally infected with IBR/Cu5. Two months later, an attempt to reinfect this group with IBR/ts RLB106 failed. Four months after the primary infection, these cattle were treated with dexamethasone. Except after reinfection and at the beginning or the end of the (re)excretion periods, excreted and reexcreted viruses replicated at 35, 37 and 40 degrees C, indicating the presence of the wild-type virus. Only one isolate, out of 116 cloned from the nasal exudates collected during the excretion and reexcretion periods, expressed the thermosensitive phenotype. This isolate was characterized by its mean plaque size as the IBR/ts RLB106 strain. The epizootiological significance of these findings is discussed, with emphasis on the weak spreading capacity of the ts vaccine strain and the possibility of emergence of recombinant viruses. [less ▲] Detailed reference viewed: 3 (0 ULg)Parturition as a stimulus of IBR virus reactivation.Thiry, Etienne ; ; et alin Veterinary Record : Journal of the British Veterinary Association (1985), 116(22), 599-600 Detailed reference viewed: 15 (5 ULg)Failure to demonstrate infectious bovine rhinotracheitis virus reactivation in parturient cows.Thiry, Etienne ; ; Pastoret, Paul-Pierre et alin Veterinary Record : Journal of the British Veterinary Association (1984), 115(10), 248-9 Detailed reference viewed: 15 (1 ULg) |
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