title: Classification of new BVDV isolates from Philippine water buffalo using the viral E2 region.
abstract: Characterization of bovine viral diarrhea virus (BVDV) isolates has been focused of several studies this last decade. Until now lots of new strains are being unfolded maybe due to the viral fast mutation ability. As we focused our research on water buffalo immunology, we were able to identify a probable new BVDV isolates. RNA was extracted from water buffalo blood in the Philippines. The extracted RNA was reverse-transcribed and synthesized cDNA. Oligonucleotide primers from the viral E2 region were used to amplify the target viral gene and later purified, cloned and sequenced. The E2 region with 420 bp nucleotides long was compared with existing published sequences in the GenBank. Based on the constructed phylogenetic tree, the isolated strain showed to be a BVDV type 1b along with Osloss and CP7 strains. Further classification of the new isolates was done within the BVDV type 1b1 group, which was compared with other strains in the sub-group. The analysis revealed that Lamspringe/738, KE9 and 2543/87 were the closest with 92% homology. Additional study is being done to further qualify and quantify the extent of the existence of this new BVDV isolates in water buffalo in the Philippines. This is the first report of BVDV in the Philippines and first concerning BVDV in Philippine water buffalo.
authors.affiliation: Laboratory of Infectious Diseases, Department of Disease Control, Graduate School of Veterinary Medicine, Hokkaido University, Hokkaido, Japan. cnmingala@hotmail.com
authors.forename: Claro N
authors.initials: CN
authors.lastname: Mingala
authors.forename: Satoru
authors.initials: S
authors.lastname: Konnai
authors.forename: Motoshi
authors.initials: M
authors.lastname: Tajima
authors.forename: Misao
authors.initials: M
authors.lastname: Onuma
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Ohashi
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D002020:Buffaloes / Q000821:virology*; D002417:Cattle; D001908:Diarrhea Viruses, Bovine Viral / Q000145:classification* / Q000235:genetics; D008969:Molecular Sequence Data; D010679:Philippines; D010802:Phylogeny; D012313:RNA / Q000097:blood / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017386:Sequence Homology, Amino Acid; D012689:Sequence Homology, Nucleic Acid; D014759:Viral Envelope Proteins / Q000235:genetics*
chemical_list: D014759:Viral Envelope Proteins; C076551:gp53, bovine viral diarrhea virus; D012313:RNA