The Fusion (F) and Haemagglutinin-Neuraminidase (HN) genes of Newcastle disease virus (NDV) and the glycoprotein B (gB) gene of infectious laryngothracheitis virus (ILTV) as well as a LacZ reporter gene were all inserted into a nonessential gene of fowlpox virus (FPV) 017 strain by homologous recombination. The NDV and ILTV genes were each under the control of a fowlpox virus immediate early/late promoter (LP2EP2), whereas the LacZ reporter gene expression cassette was regulated by a P11 late promoter. A recombinant FPV harboring the F, HN and gB genes as well as the LacZ gene, designated as rFPV-F/HN/gB/LacZ, was obtained after ten cycles of blue plaque purification. The presence of the NDV and ILTV genes was confirmed by PCR. The expression of the recombinant proteins in...
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