This last test is the most sensitive method available and is performed by obtaining a swab of the tissues around the eye which is frozen and sent by overnight mail to a special laboratory. Results are usually received within 7-10 days although treatment will often be started immediately. Viruses must live inside other cells in order to survive and reproduce. This is the reason that treating a viral infection is so difficult. Anti-viral medications must act by altering the ability of the virus to reproduce without killing the host cells.
Full recovery requires successful activation of the animal's immune system to eliminate the virus.
These conditions are usually responsive to specific medications, however careful monitoring is required. A corneal sequestrum is a localized area of the cornea which dies and becomes discolored as a result of the infection. Surgical removal of the affected area is usually required. Re-examinations during the treatment period and after discontinuing medication are important to detect these complications.