Genetic Diversity of Argentine Isolates of Feline Immunodeficiency Virus

Analysis of the genetic diversity and phylogenetic relationship of Italian isolates of feline immunodeficiency virus indicates a high prevalence and heterogeneity of subtype B.

“…Previous phylogenetic analysis of FIV strains based on the entire env gene or its V3 through V5 region have led to the recognition of at least five subtypes, designated A to E (Kakinuma et al, 1995 ;Pecoraro et al, 1996 ;Sodora et al, 1994). Similar phylogenetic lineages were also obtained when the nt sequences used were from the gag region, thus demonstrating that this genomic region also lends itself to FIV classification (Kakinuma et al, 1995).…”

“…Previous studies based on phylogenetic analysis of env gene sequences defined five, unevenly geographically distributed FIV subtypes : A (found in California and Europe), B (USA, not California, and Japan), C (British Columbia), D (Japan) and E (Argentina) (Kakinuma et al, 1995 ;Pecoraro et al, 1996 ;Sodora et al, 1994). Similar results were also obtained when the nucleotide (nt) sequences of the gag gene were analysed, indicating that this gene has the prerequisites needed for classifying virus isolates (Kakinuma et al, 1995 ;Rigby et al, 1993).…”

Genetic diversity of Brazilian isolates of feline immunodeficiency virus

“…Within the env gene, nine variable regions have been defined, separated by more conserved regions [26]. On the basis of the analysis of envelope glycoprotein variable regions 3-5, FIV has been classified into five subtypes [17], [27,35], a number that can be expected to increase as further studies reveal additional diversity. Recent studies identified distinct groups of FIV isolates from the Unites States and New Zealand [40,10].…”

Feline Immunodeficiency Virus and Its Receptors

“…3 On the basis of the analysis of envelope glycoprotein (ENV), third to fifth variable regions, V3-V5, FIV has been classified into five subtypes (Kakinuma et al 1995, Pecoraro et al 1996, Sodora et al 1994) a number that should be expected to increase as further studies reveal additional diversity. Recent studies identified distinct groups of FIV isolates from Unites States and New Zealand (Hayward et al 2007, Weaver et al 2004).…”