Feline Herpes Viral Conjunctivitis

Conjunctivitis is an inflammation of the clear covering (the conjunctiva) which covers the white of the eye and the inside of the eyelids. The cornea can also become cloudy or even ulcerated. Conjunctivitis in cats is usually caused by the feline herpes virus which, when contracted, exists primarily upper respiratory tissues and conjunctivae. Humans can not contract feline herpes virus.

The most severe symptoms are experienced when the virus is first contracted. This phase is resolved as the immune system contains the virus within the trigeminal ganglion neuralogic structure. However, the symptoms may return from time to time when the immune system becomes run down or is taxed.

Feline herpes infection is common in kittens weakened by fleas, poor nutrition, or cold, etc. In kittens, the swelling of the conjunctivae can be so severe that the eye may swell shut or even rupture. The herpes infection typically also causes respiratory problems. As kittens mature, they will continue to have conjunctivitis during periods when their immune system is weakened.

The primary treatments for feline herpes include topical antibiotics and antiviral eye drops. Oral lysine is also used widely to treat feline herpes virus. The herpes virus is highly dependent on the presence of the amino acid arginine which is required for the virus to reproduce. When it is available, the amino acid lysine is taken up by the virus in favor of arginine which suppresses the ability to reproduce. Cat owners should only use lysine products intended for felines such as Vyralis with L-Lysine. Products formulated for humans may contain propylene glycol as a preservative, which can cause reactions in the blood.