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Vet Rec. 2004 Feb 7;154(6):171-4.

Molecular characterisation of a field strain of bubaline herpesvirus isolated from buffaloes (Bubalus bubalis) after pharmacological reactivation.

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Istituto Zooprofilattico Sperimentale del Mezzogiorno, Sezione Diagnostica di Salerno, Via delle Calabrie 27, 84132 Fuorni-Salerno, Italy.


Two healthy buffaloes (Bubalus bubalis) in a herd which had not been vaccinated against infectious bovine rhinotracheitis (IBR), were selected for their seropositivity for anti-bovine herpesvirus type 1 (BoHV-1) glycoprotein E antibodies, and injected intramuscularly daily with dexamethasone for five consecutive days (day 1 to day 5) to reactivate any latent herpesvirus. Blood samples and nasal and vaginal swabs were collected daily from day 5 to day 15 from each buffalo for virological examination. All the vaginal swabs and blood samples were negative, but 13 of the 22 nasal swabs were positive; a cytopathic effect was observed in primary cultures of bovine fetal lung cells, and the viral isolates were identified as a herpesvirus by PCR. The viral strains were characterised by the sequence analysis of the genes coding for glycoproteins D and B, and the gene sequences were then used for phylogenetic analysis. The isolates from both buffaloes appeared identical at the level of the two genes, and were more closely related to bovine herpesvirus type 5 than to BoHV-1.

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