Phylogenetic analysis of classical swine fever virus isolated from Taiwan.
By analyzing the E2 sequences of classical swine fever virus from field outbreaks in Taiwan during 1993-2001, three virus populations with distinct genotypes were determined including one historical (subgroup 3.4) and two exotic (subgroup 2.1) strains. The first subgroup 2.1 virus was isolated in 1994 and further sporadic outbreaks occurred after 1996. Phylogenetic analysis using the E2 region has segregated the Taiwanese strains of 2.1 virus into two different genotypes (termed 2.1a and 2.1b). The 2.1b viruses were only isolated in 2001 and shared approximately 94.8% nucleotide identities to the 2.1a viruses in the total genomic sequences. The results suggest that the 2.1a and 2.1b viruses may be introduced from different origins.
Deng
Ming-Chung
MC
Department of Hog Cholera, National Veterinary Research Institute, Council of Agriculture, 376 Chung-Cheng Road, Tamsui, Taipei 251, Taiwan.
Huang
Chin-Cheng
CC
Huang
Tien-Shian
TS
Chang
Chia-Yi
CY
Lin
Yu-Ju
YJ
Chien
Maw-Sheng
MS
Jong
Ming-Hwa
MH
D000818:Animals; D006691:Classical Swine Fever / Q000453:epidemiology* / Q000821:virology; D006692:Classical Swine Fever Virus / Q000145:classification* / Q000235:genetics*; D004279:DNA, Viral / Q000737:chemistry; D004196:Disease Outbreaks / Q000662:veterinary; D005838:Genotype; D017720:Molecular Epidemiology; D010802:Phylogeny; D012367:RNA, Viral / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction / Q000662:veterinary; D016415:Sequence Alignment / Q000662:veterinary; D017422:Sequence Analysis, DNA; D013552:Swine; D013624:Taiwan / Q000453:epidemiology
D004279:DNA, Viral; D012367:RNA, Viral