Heartworm disease is transmitted by mosquitoes. Though cats are less likely to develop heartworm disease than dogs, the disease can nonetheless be serious. In cats, it can be either acute or chronic. Infected cats with acute cases may show no visible symptoms but they may suddenly die. In chronic cases, symptoms such as coughing, lethargy, vomiting and weight loss may be seen. Treatment is very serious and typically requires hospitalization.
Preventative measures are the best course of action when it comes to heartworm. Indoor cats are understandably less likely to become infected than outdoor cats. Your veterinarian may recommend a heartworm medication for your cat, particularly if you live in a high-risk area.