Classical swine fever virus isolates from Cuba form a new subgenotype 1.4.
Identification and classification of classical swine fever virus (CSFV) on the basis of nucleotide sequencing and phylogenetic analysis have become an important tool to study the epidemiology and to control CSF disease. According to phylogenetic analyses of short sequences from the 5'nontranslated region (150 nt) and the E2 (190 nt), most CSFV isolates from South and Central America have been assorted to the subgenotypes 1.1 and 1.3, while CSFV isolates from Cuba have been allocated to subgenotype 1.2. Here we demonstrate that determination and comparison of full-length E2 sequences as well as of the sequences encoding for N(pro), C, E(rns), E1 and E2 (3361 nt) do not support segregation of Cuban CSFV isolates to subgenotype 1.2. In fact, our analysis revealed that the Cuban isolates are more divergent from other so far known CSFV subgenotype 1 isolates and form a novel separate subgenotype that is proposed to be designated subgenotype 1.4.
EU and OIE Reference Laboratory for Classical Swine Fever, Institute of Virology, Department of Infectious Diseases, University of Veterinary Medicine Hannover, Buenteweg 17, 30559 Hannover, Germany.
Alexander
A
Postel
Stefanie
S
Schmeiser
Carmen Laura
CL
Perera
Lester Josué Pérez
LJ
Rodríguez
Maria Teresa
MT
Frias-Lepoureau
Paul
P
Becher
D000818:Animals; D001483:Base Sequence; D006691:Classical Swine Fever / Q000453:epidemiology / Q000235:genetics / Q000821:virology*; D006692:Classical Swine Fever Virus / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification; D003462:Cuba; D010802:Phylogeny; D022661:RNA, Untranslated / Q000235:genetics; D012367:RNA, Viral / Q000235:genetics; D013552:Swine
D022661:RNA, Untranslated; D012367:RNA, Viral