Cat Corner : Frequently Asked Questions and Concerns

Question:   Is heartworm disease really a problem in cats?

Answer:

Yes.  Most pet owners are familiar with the potential effects of heartworm disease in dogs, but not many are aware that heartworrns can effect cats, too.  Recent studies have shown that cats can contract heartworm disease from mosquitoes, just like dogs can if they are not properly protected against heartworm disease.  If a heartworm-carrying mosquito bites a cat, the immature stage of the heartworm will travel through the cat, lodge in spaces in the cat’s lungs and heart, and begin maturing.

During the stage when an immature heartworm is growing in a cat, the cat's lungs send up a horrible inflammatory reaction which looks just like a cat is having asthma attacks.  The cat has coughing spells, and episodes when breathing is difficult.  A heartworm test for the cat and chest x-rays can help lead to a diagnosis of heartworm disease in your cat.  These asthma signs can usually be controlled by appropriate steroid anti-inflammatories and other drugs which your veterinarian can prescribe.  After the initial phase of growth, the heartworm reaches an adult stage in the cat's lung where it can live quietly for a few years without giving the cat too much dificulty.  However, when the adult heartworm dies in the cat's lungs after a few years, it creates an intense inflammatory reaction in the cat lung which can kill a cat very quickly through respiratory distress.


Question:.  "What can be done to prevent heartworm infection in cats?

Answer: 

We recommend once-a-month heartworm prevention for every cat.  There is heartworm prevention available in a chewable treat for cats, which most cats find appetizing.  The occasional cat who does not find the heartworm prevention appetizing will usually have no problem eating it if it is shredded into tasty canned cat food.


Question:.  "Dogs are supposed to be tested for heartworms before being started on heartworm prevention.  Should I have my cat tested before starting heartworm prevention?"

Answer:

If a cat is showing or has shown clinical signs of heartworm disease, such as chronic coughing, shortness of breath, or chronic vomiting then heartworm testing and chest x-rays are recommended to determine if the cat has heartworm disease before starting heartworm prevention.  If a cat has not been showing any of these signs, then it is all right to go ahead and get them started on the once-a-month heartworm prevention.


Question: "My cat is an indoor cat, so I don't have to worry about heartworm disease, right?"

Answer:

Wrong. 50% of cats who are being diagnosed as having heartworm infection are "indoor" cats.  It doesn't matter if a cat goes outside or not because mosquitoes seem to get to them regardless.  Every cat, whether it is "indoor only" or goes outside, should be getting once-a-month heartworm prevention.


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