Dogs with heartworm disease can live high-quality lives as long as they are given appropriate care. After completing treatment and following your veterinarian's recommenda- tions on heartworm disease testing and prevention, the chances of any long-term effects are very low.
Dogs can live for at least six to seven months after becoming infected with heartworms. This is because it takes that long for adult heartworms to grow.
Prognosis: heartworm treatment success rates
With the three-dose adulticide protocol described above, in conjunction with doxycycline and macrocyclic lactones as recommended by the American Heartworm Society, 98% of dogs will be cleared of heartworm infection.
A diagnosis of heartworms is not a death sentence, even in a somewhat older dog.
With heartworm disease treatment can be extremely difficult even for the young otherwise healthy dogs but our senior dogs can see more severe side effects and death if progressed disease is present. Know that 1 in 10 dogs will develop some form of heart disease as they age.
Your senior dog needs a year-round medicine to prevent intestinal parasites, which are found in your dog's feces and can be transmitted to humans, so talk to your veterinarian about how to keep everyone in your home protected. Keep your senior dog's heartworm preventive as well as flea and tick control updated.
Stage 4 – Heartworms have caused severe damage to the animals heart, lungs, liver, and kidneys. In this stage, Caval syndrome is likely. Caval syndrome is when there is such a large amount of worms blocking blood flow to the heart that it creates a sudden life-threatening problem in need of quick surgical intervention.
Signs of heartworm disease may include a mild persistent cough, reluctance to exercise, fatigue after moderate activity, decreased appetite, and weight loss. As heartworm disease progresses, pets may develop heart failure and the appearance of a swollen belly due to excess fluid in the abdomen.
They can be controlled naturally with citrus oils, cedar oils, and diatomaceous earth. Dogs needing conventional treatment may benefit from herbs such as milk thistle and homeopathics such as berberis; these minimize toxicity from the medications and dying heartworms.
Though the dog's system has not displayed the ability to damage or dislodge adult worms, an otherwise very healthy dog may be able to outlive the worms, which can survive in the heart for five to seven years. The tests that can detect canine heartworm have increased in sophistication.
The adult worms die in a few days and start to decompose. As they break up, they are carried to the lungs where they lodge in the small blood vessels and are eventually reabsorbed by the body.
Right now, heartworm disease can only be prevented through the regular and appropriate use of preventive medications, which are prescribed by your veterinarian. These medications are available as a once-a-month chewable, a once-a-month topical, and either a once or twice-a-year injection.
In the newly infected dog, it takes about 6 to 7 months for the infective larvae to mature into adult heartworms. The adult heartworms mate and the females release their offspring into the dog's bloodstream, completing the lifecycle.
Stage 4. There is a large mass of worms which physically blocks the blood flowing back to the heart. This stage is life-threatening and requires quick surgical removal of the heartworms. However, surgery is risky and even with surgery, most dogs in this stage die.
Dogs with heartworm infections will feel weaker, and will find it harder to remain active, even in low-energy activities. Weight loss and loss of appetite. In more advanced stages of heartworm infections, your dog will find it hard to complete normal physical tasks like eating.
Restrict exercise– no running, walks for exercise or rough-housing. Generally speaking, it's ok to walk your dog outside to use the restroom or to sit outside to enjoy the weather, but no walks (short or long) for exercise. Your veterinarian may have alternative recommendations.
The average cost of heartworm treatment for dogs can be upwards of $2,700 — and potentially thousands more if surgery is needed. If your pet has been diagnosed with heartworm, treatment varies greatly depending on whether you have a dog or cat.
If given to a heartworm positive dog by accident
In most cases no reaction of any kind occurs when an ivermectin-based heartworm preventive is given to a heartworm positive dog. In fact, giving an ivermectin-based heartworm preventive to an infected dog is the first step in heartworm infection treatment.
Dogs that have a high number of heartworms often develop symptoms such as pronounced and persistent coughing, difficulty breathing, and exercise intolerance. In more severe cases, dogs may also experience fainting or collapse, pale mucous membranes, weakness, elevated heart rate (tachycardia) and severe lethargy.
A complication of heartworm infection, known as caval syndrome, leads to shock-like symptoms and sudden death.
The only product currently available for the treatment of adult heartworms is melarsomine dihydrochloride (immiticide). During treatment, the patient receives an intramuscular injection deep in the lower back muscles. This is a painful injection and it is common for the patient to be quite sore at home afterwards.
If owners can't afford treatment at the time of diagnosis, Dr. Herrin recommended delaying melarsomine therapy but still initiating treatment with both a preventive and doxycycline. This will prevent further infection and remove the dog as a heartworm reservoir.
While many people estimate the average age at which a dog becomes a senior at about 7 years old, this can actually vary considerably between the ages of 5 and 12.
The American Heartworm Society recommends that you “think 12.” Have your dog tested for heartworms every 12 months and provide 12 months of preventative care.
Most of the monthly heartworm medicines have a safety factor of at least 15 days of protection if a dose is missed. This means that if you're just a week or two late, your pet is likely still within that window of protection and would be unlikely to become infected during that time.