Feline herpesvirus type 1 (FHV1) is an important pathogenic agent that causes feline viral rhinotracheitis, which is a highly infectious upper respiratory tract infection of felids. The virus is readily transmitted between cats through: direct contact (through contact with saliva, ocular or nasal secretions), inhalation of sneeze droplets, sharing or food bowls and litter trays, and a contaminated environment (including bedding and grooming aids). This infection is often fatal to kittens, but adult cats usually survive and exhibit lifelong latency.