Journal List > J Bacteriol Virol > v.37(3) > 1033873

Yang, Kim, Kweon, Park, Kim, So, and Kim: Genetic Typing of Bovine Viral Diarrhea Viruses (BVDV) Circulating in Korea

Abstract

To characterize the genetic diversity of bovine viral diarrhea viruses (BVDV) circulating in Korea, 11 BVDV isolates were obtained from 467 field samples collected during 2005∼2006 in Korea. All of the BVDV isolates were identified as non-cytopathic (non-cp) BVDV biotypes. The 5′ noncoding region (NCR) genes of the isolates were sequenced and analyzed. In total, ten BVDV isolates were typed as BVDV-1 by comparing the genomic sequences to the 5′ NCR. One isolate (05R169) showed 98.6% nucleotide sequence identity with the BVDV-2 reference strain and was therefore typed as BVDV-2. Our results indicate that BVDV-1 is the main genotype circulating in the cattle population of Korea.

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Figure 1.
Immunofluorescence of 05R169 isolate by IFA test using monoclonal antibody against BVDV in MDBK cell.
jbv-37-147f1.tif
Figure 2.
RT-PCR products of BVDV isolates were detected on 1.5% agarose gel. The expected size was 288 bp. M; 100 bp DNA ladder, Lane 1; 05D26, Lane 2; 05D73, Lane 3; NADL strain, Lane 4; negative sample.
jbv-37-147f2.tif
Figure 3.
Phylogenetic tree of the 5′ non-coding regions (NCR) of BVDV strains and isolates. The tree was generated from comparative alignment of sequences from 245 bp of the 5'NCR of the BVDV genome. The multiple sequences were constructed by the neighbor joining method. Genotypes were given on the right of tree. Abbreviations: Korea (KOR), Australia (AUS), Germany (GER), Canada (CAN), Slovenia (SLO), Belgium (BEL), Japan (JPN), China (CHI), Italy (ITA), Sweden (SWE), United State of America (USA).
jbv-37-147f3.tif
Table 1.
Bovine viral diarrhea viruses isolated from cattle in Korea and GenBank accession numbers of their 5'NCR nucleotide sequences
Virus isolate Source of sample Isolated province Breed Biotype Genotype Accession number
05D26 Tissue homogenate Chungbuk K NCP 1b DQ973172
05D73 Tissue homogenate Gyeonggi H NCP 1b DQ973173
05Q122 Aborted fetus Chungnam H NCP 1b DQ973175
05D137 Aborted fetus Jeonbuk K NCP 1a DQ973174
05Q174 Tissue homogenate Gangwon H NCP 1b DQ973176
05R169 Blood plasma Chungnam H NCP 2 DQ973177
05R203 Blood plasma Gyeongnam K NCP 1b DQ973178
05R204 Blood plasma Gyeongbuk H NCP 1a DQ973179
06R447 Blood plasma Gangwon K NCP 1a DQ973180
06Z71 Blood plasma Chungnam K NCP 1c DQ973181
06Z127 Blood plasma Chungnam K NCP 1c DQ973182

K: Korean native cattle, H: Holstein dairy cattle.

NCP: non-cytopathic.

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