Targeting Feline Retroviruses


  • FIV targets immune cells in a manner similar to HIV. Impaired immune responses result in more secondary infections and increases in comorbidities.
  • Approximately 4% of cats in the United States are infected with FIV (ME Westman et al. 2022).
  • There are no FDA-approved drugs for FIV.
  • Current available therapies manage symptoms and may temporarily reduce virus replication.
  • Available FIV vaccines provide some protection.
  • There is no cure for FIV.
Reported rates of FIV infection in cats for indicated countries as available from the literature.

Reported rates of FeLV infection in cats for indicated countries as available from the literature.

Numbers were calculated from the total number of household cats (excluding feral) X the prevalence rate for each country. Selected countries here include those with literature references to support estimates (available upon request – see contact page). While China, Brazil, Malaysia and Thailand also show high rates (11-24%) of feline retroviruses, household cats are more difficult to define. Numbers denoted with an asterisk (*) were estimated using regional data.