title: A detailed phylogenetic analysis of FIV in the United States.
abstract: BACKGROUND
  Feline immunodeficiency virus (FIV) is a lentivirus associated with AIDS-like illnesses in cats and has been used as a model for the study of human immunodeficiency virus (HIV). A feature of HIV and FIV infection is the continually increasing divergence among viral isolates between different individuals, as well as within the same individuals.
  
  
  RESULTS
  The goal of this study was to determine the phylogenetic patterns of viral isolates obtained within the United States (U.S.) by focusing on the variable, V3-V4, region of the FIV envelope gene.
  
  
  CONCLUSIONS
  Data indicate that FIV, from within the U.S., localize to four viral clades, A, B, C, and F. Also shown is the geographic isolation of strains where clade A and clade B are found predominately on the west coast; however, clade B is also found throughout the U.S. and represents the predominant clade. This study presents a complete and conclusive analysis of FIV isolates from within the U.S. and may be used as the essential basis for the development of an effective multi-clade vaccine.
authors: Division of Infectious Diseases, Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota, United States of America. weaver.eric@mayo.edu
authors: Eric A
authors: EA
authors: Weaver
mesh_terms: D000818:Animals; D002415:Cats; D019143:Evolution, Molecular; D014644:Genetic Variation; D016089:Immunodeficiency Virus, Feline / Q000235:genetics*; D010802:Phylogeny; D014481:United States; D014759:Viral Envelope Proteins / Q000235:genetics
chemical_list: D014759:Viral Envelope Proteins