Interview with an Expert: Herpes Eye Infections in Cats
Recognizing, treating and preventing herpes eye infections in your cat.
Faye Rapoport DesPres, Contributor
Articles> Interview with an Expert: Herpes Eye Infections in Cats
cat with eye infection

Fiona, a Scottish Fold and one of our five cats, has had eye problems since she was a kitten. She was diagnosed with the herpes virus two years ago, and after some treatment was fine for over a year. Recently I noticed that she was blinking and squinting on a regular basis, so I took her back to the vet. We talked through a range of possibilities before the doctor decided that she was again suffering from symptoms caused by the virus.

Thankfully, Fiona is doing very well after a number of weeks on special eye drops. To learn more about this feline condition, I contacted Dr. Daniel J. Biros DVM, DACVO, a board-certified ophthalmologist at Angell Animal Medical Center in Boston. Below is some information he shared about herpes eye infections in cats.

Care.com: What exactly is a herpes virus eye infection, and how prevalent is it in kittens and cats?

Dr. Biros: Feline ocular herpesvirus, or FHV-1, is a very common virus in cats. While it is thought that most cats (over 90 percent) harbor the virus, only a small percentage of cats actually show clinical disease. These cats are usually immunosuppressed from stress or disease, or they may harbor a more virulent strain of the virus.

Care.com: Is it true that pure-bred cats born in catteries are more likely to have these infections?

Dr. Biros: To my knowledge there is no breed predisposition to cats with FHV-1. Catteries often have problems with FHV-1 due to a high level of cat-to-cat contact, thereby creating the greater likelihood of pathogen transmission.

Care.com: What are the symptoms?

Dr. Biros: Clinical signs are variable and may be mild to severe. Mild squinting, runny eyes, and conjunctivitis are mild generalized ocular signs consistent with FHV-1. More severe signs may involve changes in the cornea such as cloudiness or redness. In severe cases there may be vision impairment, a marked increase in tearing, and squinting. Ocular herpes can be very painful and if untreated could lead to vision loss or loss of the eye in the most severe infections. There may also be upper respiratory signs, such as a runny nose, sneezing, or nasal surface ulceration.

Care.com: How is it determined that a cat has the virus?

Dr. Biros: Diagnostic tests are difficult at best to determine if a cat has FHV-1. A fresh and properly prepared sample of the cat's conjunctival or corneal cells may yield evidence of virus based on a molecular screening test called a PCR (polymerase chain reaction). Viral cultures are rarely done and not necessarily practical in a clinical setting. Most cats are treated based on the history and clinical signs. Often if a superficial linear, or dendritic (branching or lightning bolt shaped), corneal ulcer is noted on the clinical examination, there is a high likelihood of FHV-1 being present. Ulcers on the cornea if present are not exclusively linear and may be geographic, covering a variable area of the corneal surface.

Care.com: Once a cat is infected, is the condition ever cured?

Dr. Biros: There is no cure for herpes virus. It can be driven into remission but never cured.

Care.com: We had a cat that was diagnosed with this condition, but at one point the veterinarian was having trouble distinguishing between symptoms of the herpes virus and a possible allergy or bacterial infection. Is there a difference between the symptoms?

Dr. Biros:: Not always. The symptoms are often similar. Chronic ocular surface inflammation from one cause or another can appear very similar. In severe cases, herpes infections may also acquire a bacterial or dry eye component complicating the situation and causing more damage to the ocular surface.

Care.com: What are the treatment options for a herpes virus eye infection, and does treatment have to be long-term?

Dr. Biros: Treatment is usually a combination of medicine to address the virus specifically, medicine to provide lubrication and antibacterial protection, and in some cases, medicine to manage the pain of the outbreak. Usually there is a combination of oral and topical medication. Surgery to repair a damaged eye is indicated only in the most severe cases. Treatment is often long-term, and for most cats is recommended up to two weeks beyond resolution of clinical signs. When to stop or change treatment should be left up to the veterinarian managing the disease.

Care.com: When giving a cat eye drops, is there anything important to know about how to give the drops or keeping the drop bottle clean?

Dr. Biros: Most eye medication is sterile when opened, but once opened the tip of the bottle is likely to get contaminated at some point. Avoiding contact with fingers, the ocular surface or eyelids when applying the medication will reduce the risk of dirtying the tip of the bottle or tube. Often if you can point the cat's nose to the ceiling and then spread the eyelids open it is easier to apply drops. Ointments can be best applied between the inside of the lower eyelid and the ocular surface or on the top of the eye after manually raising the upper eyelid. There is no specific proper way to deliver the medication, often it is whatever works best for a given cat and client.

Care.com: Is the condition contagious between cats, or between cats and humans or other species?

Dr. Biros: None of the common infectious ocular surface diseases in cats can be passed to other species including humans and vice-versa. On the other hand, cats can easily spread FHV-1 to other cats through nasal and ocular secretions, especially during an outbreak.

Care.com: Are there preventive measures that can be taken to either avoid infection in the first place, or recurrence of symptoms after treatment?

Dr. Biros: A low-stress environment, good nutrition and health, and in some cases, some degree of ongoing medication can all contribute to reducing or altogether eliminating outbreaks.

Care.com: Where can cat lovers learn more about this condition?

Dr. Biros: Your primary care veterinarian can provide you with more detailed information on FHV-1. The internet can also be a good resource for additional help on the topic. Specifically, Web sites that are linked to veterinary ophthalmology practices will provide the most helpful tips and information.

It's good to know our little Fiona has a condition that, although life long, can be managed. Hopefully we can avoid any future outbreaks -- but we'll be "keeping an eye on her" for any future symptoms!

Faye Rapoport DesPres writes about pet care issues for Care.com and other publications. She has five cats and a website at ourplacetopaws.com.

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(20) Comments
Pat
Pat
Oh my gosh...your stories about broke my heart, I never like cats until I got my Herbie...7 years ago!! He is my heart!! Last April, he stopped eating, he would go over to his food look at it and walk away. I noticed he was so warm, I took him to his vet that only sees cats. She said he had pancreatic, he stayed at the vet for a week and $800 later I got he out. When I got him home, he started making funny noises, I took him back to vet. She told me he had the backward sneezes. Never heard of it, there goes another week at the vet...I told her I was out of money. This angel, only charged me for the medicine for the week he was in there $60. Poor Herbie, he is long hair, gets knotted up. I had them to shave some of the bad places off of him. (DID I SAY HE WAS A INDOOR OUTDOOR CAT) Well when he got out of the vet, he went outside got attacked by another animal, he got bites and scratches all over his body, they got infected, back to the vet we go. I know that vet thought that I was the worst Mommie, He keeps the herpes viral. To top it all off, he thinks that Temptation treats is his food and I can not seem to get him off of them to get him to eat his special food for his condition. Any suggestions???
January 6, 2015 at 6:34 PM
Danielle
Danielle
Just a warning about the l-lysine treats for cats: I was giving my cat them on recommendation of my Vet for FHV-1. The l-lysine cleared up his FHV-1 eye problems immediately. Unfortunately the inactive ingredients in the treats gave my cat a urinary tract infection. His system is really sensitive to cat treats, so I can only give them to him sparingly. Since I was giving them to him twice a day, he got a UTI. I went to vitamin shoppe and got the l-lysine powder instead. I sprinkle it on his food. He was a little picky about it at first, but he got hungry and now it doesn't even phase him.

Although in the past, the antibiotics prescribed worked as well, it was just too stressful for him to take for a long period of time...and they gave him the runs.

I would definitely recommend the l-lysine since it is a more natural route, but be careful about the treats...
August 27, 2014 at 3:46 PM
catlover
catlover
Rhonda, try the genteal drops that sandra recommended, walmart has a brand cheaper with the same ingredients, it helps my isabella...also use l-lysine for cats...you can get them both on amazon...I get the treats and paste, they help with flareups.
June 27, 2014 at 7:54 PM
catlover
catlover
When posting a comment about your cat having feline herpes, I think its inappropriate to use LOL anywhere in your paragraph JOYCE..this is no laughing matter...l lysine definately helps with flareups..my boy kitty likes the treats and my girl kitty gets the paste mixed with her canned food.
June 27, 2014 at 7:48 PM
Tee 'n' the Wildlife
Tee 'n' the Wildlife
Oh, and amusingly enough, I always think that kitties prefer to go to the ophthalmologist because they don't have to take off their clothes the way they do at the regular vet!
April 20, 2014 at 10:02 PM
Tee 'n' the Wildlife
Tee 'n' the Wildlife
If your poor kitty has conjunctivitis from herpesvirus you do not want to mess with it if it does not resolve quickly. Ask your vet for the name of an ophthalmic specialty vet. They really know their stuff! Bite the bullet and pay the cost to save your beloved animal pain and the possible loss of one or both eyes. I have seen these vets work what would have been considered miracles in the past. (As someone who had corrective eye surgery at four years old I have no hesitation at taking the little darlings to a specialist!)
April 20, 2014 at 9:56 PM
Trace
Trace
My Siamese shelter kitty had red around the eyes but no other signs. She is very active and eats like a horse. I believe she was born with the herpes virus. She liked to get on the bed and kiss me on the mouth and though most every source tells me I can not get the herpes from a cat, my pharmacist said I could and I have a fever blister and flu like symptoms for 3 weeks or more. And My 13 year old daughter has gotten bouts of ring worm since we adopted the Siamese. I use Tinactin cream ( drugstore)for ring worm and it goes away in a week or so. My other cat who is 13 spit up yesterday and began to sneeze and looked a little like he was not himself. I think that the Siamese infected him, too. I am not sure what to do I love my cats and the children adore them but like to kiss them and I don't want to put my children at risk with the cats--I am not sure what to do. I heard that human lysine can have heavy metals and is not good for cats better to use cat lysine or maybe get human lysine from the health food store,( no heavy metals??)
March 27, 2014 at 9:22 AM
Tess
Tess
i have had my rescue tortie for 10 years. she was in a terrible state when i got her, obviously had had much stress as was missing a leg and lost most of fur. her fur grew back after lots of TLC but had lots of itchy skin problems so i had a food tolerance check done on her and found i was harming her by feeding her chicken now and again... the results of the test showed she was allegic to just about everything. so for 6 years now she has been on Hills ZD low allergen and loves them! skin all healed... i give her a treat now and again(no chicken!) but mainly its those biscuits.
my vet thinks she has the herpes virus, as her eye has an outbreak every couple of years...just clearing up for the 2nd time... he rubbed the cornea (ouch) to disperse the ulcer and she has had a month of drops Fucithalmic... touch wood all looking much better. but i do think you need a vet that knows what they are doing re cats. and dont just diagnose and treat by yourself!!
December 29, 2013 at 11:21 AM
Meg
Meg
My 10 yr. old cat Morandi and my 2 yr. old cat Sky were just diagonosed with feline herpes since they both seem to have eye infections. The vet. prescribed eye drops and eye cream and lysine treats. I am giving the medicines 4X per day and hoping and praying they will both get better soon, however I am most concerned with my 10 year old cat as he seems to be "limping" today? I hope this is not a reaction to the medicines and just a result of him resting and sleeping more often from being sick? Thank-you for any insights.
August 17, 2013 at 10:22 PM
natalie
natalie
jean, cats do not die from herpes (calicivirus). They will have the virus their whole life and it will become active in times of stress. The lysine (500mg/day adult cat), will keep their immune system healthy and prevent the virus from becoming active. If the virus is active and the cat has an ulcer in the eye the vet will usually put the cat on either Cidofovir or Idoxuridine ophthalmic solution (both anti-viral eye medication) and possibly and oral anti-viral (Famciclovir). If your vet if NOT using an anti-viral medication your cat will not get any better. It will not repond to antibiotic eye meds only. Natalie R.V.T.
August 13, 2013 at 7:03 PM
jean
jean
My little Buster has herpes, 12 trips to the vet, $1500, and he has started sneezing AGAIN this morning. I love this little guy, but I am on a fixed income and am out of money. will he die from this? Drops salves, shots, I have another appointment in the morning with my vet. He said if he was no better I need to see an opthamologist.. HELP. I don'y know what to do! I give him 4 lysine treats a day as the vet said.. is that enough?
July 14, 2013 at 7:31 PM
Catwoman
Catwoman
Our beautiful 11 year old Maine Coon has herpes eye infection since birth. He was taken to the vet, and our vet suggested oral powder L-Lysine HCI in the hard food, and in the morning we give him Forti Flora Feline Nutritional oral powder in soft food, and apparently this one tastes really good. The eye medications are as follows: Cyclosporin oil 15ml 3 drops/day, Tacrolimus 0.02% oil 10ml 2 drops/day, Optixcare 2 times a day, and Tears Naturale 2 times a day. He has dry eye caused by this, and his number when tested is 0, meaning no tears? The numbers go back and fourth to 0, then 5 or 8, but it is suppose to be higher. His nose filter is damaged and that is why cats always seem to have a cold, but the nose filter is damaged. We also did a MRI. We have two Maine Coons and the other one did not get this disease and they are very close together, licking, sleeping together and on and on. Thank God! as this is painful. Unfortunately as indicated in this article, Feline ocular herpesvirus, or FHV-1, is a very common virus in cats, at least 90%. We have done everything to make his cat life comfortable. Just give your buddies their medications, hugs and kisses, they know you love them.
May 13, 2013 at 6:11 PM
Lillie's Mom
Lillie's Mom
My Lillie is a rescue kitty who has always had one eye that leaves a trail down her face. The eye never seems to bother her but the vet says she has FIV. She has been getting Lysine daily and had Tobra drops for a couple of months. The condition never seems to change, no worse but no better. What should I try? I am tired of spending $ for meds that don't do anything! The eye has never been cleared up. It's more a cosmetic issue at this point - her white face is always stained below that eye. As I said she has no ulcers or anything else and she doesn't seem to notice it other than grooming that side more.
April 30, 2013 at 9:48 PM
Cindy G
Cindy G
Pleae take your kitty to a feline vet. My Ragdoll (Max) got very sick right after I purchased him. I spend tons of money at a regular vet and my Max was still suffering. I finally found a great feline vet that took one look at him and knew exactly what was wrong. She gave me a RX for Famciclovir (10 day treatment) and it worked like a charm. He takes Lysine treats (purchased at the vet) everyday.
April 19, 2013 at 1:51 PM
Victoria S.
Victoria S.
Lysine really helps my Mom cat and her 2 daughters who've had FHV-1 since birth.
500 ml a day; open capsule and put in their Science Diet Light canned food.
They never mind the taste at all. They have been in remission pretty much for
over a year just with this alone. However just had a flair up yesterday, went to animal eye care doc who prescribed famciclovir tablets ($$) and ofloxacin drops
March 23, 2013 at 12:37 PM
Meowsers
Meowsers
Our little Meowsers, definitely has something going on with her, I've taken her to 2 vets, and each wants a fortune just to test her, thinking it could be herpes, ringworm, or mange. She is 14 weeks old, we got her free to a good home one week before Christmas, and she had a patch on her right ear that had no fur. Because how young she was I thought it was a birth mark. Two weeks ago she kept squinting her right eye, that's when I first took her in. They gave me Erythromycin ophthalmic using it 3x's a day, the eye then got cloudy and now she has two ulsers, and more spots have shown up on her, mostly on her paws and other ear. Is there any hope for her. Any advice ASAP would be a blessing. We are afraid we're going to have to give her up, and she is part of the family now. The good think is her spirits are high, she is very active, and loving.
February 8, 2013 at 11:34 PM
Joyce
Joyce
My 6 month old Devon has been constantly afflicted with herpes which settles in his eyes and immediately goes bacterial. The little darling has now infected his brother, from another mother. LOL Anyway lyseine has been very helpful and more recently famvir (famciclovir) has worked very well. The plan is to give my boy famvir at first squint for 5 days in a row (1/4 tab) and hoping this kicks the snot out of the virus before it goes bacterial. The lysine is 500 mg a day maintenance and 1,000 for an outbreak. I am hoping that as he matures, so will his immune system. He get grain free food and likes yogurt with his lysine. I realize it is all about controling the number of outbreaks. Honestly, I look at that little face and just love him to bits.
January 31, 2013 at 3:26 PM
Angela
Angela
I have a 2 year old cat and noticed just yesterday that his eye was runny and crusty, I brought him to the vet today and the vet said that the cat had Herpes in his eye. No tests were done and the vet prescribed Ofloxacin Ophthalmic Solution, since using it he's been rubbing his eye and it seems to have gotten a lot worse, my husband thinks its just that the virus is in the beginning stage and is showing more serious signs... and that the solution will help over the next few days. Should I be concerned that his eye has increasingly worsened since the first application? Please help! Thanks!
January 3, 2013 at 2:02 AM
AnnaMichelle
AnnaMichelle
I have a kitten thats about 6 weeks old. They all came down with a URI and all the kittens started having eye problems, closing up and swollen. Most of the kittens are better now but there is one kitten whose eye looks like it is fusing shut with skin....Ive been using Erythromycin ophtalmic but his eyes are just getting worse. Should I get him checked for the herpes virus or can anyone recommend drops I really hate for him to loose his vision. THANKS
June 2, 2012 at 8:19 PM
Rose
Rose
My cat is taking 6 Lycine pellets a day and it seems to be helping.
May 29, 2012 at 4:56 PM

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