Pet Dog Cat Heartworm Medication Resistance?

For more please visit: www.DogExplorer.com – comments are moderated! Follow us on Twitter http – Every month, lots of dog owners, and a few cat owners, give their pets some form of heartworm prevention. But recent studies are showing increasing numbers of heartworm positive pets across the country. Some people believe the worms now have the upper hand. Has our trusted protection failed us? Dog owners, and a growing number of cat owners understand that once-a-month heartworm preventives keep their pets safe from a very serious cardiovascular parasitic disease. Despite consistent use of preventive medications, a significant number of dogs are testing positive for heartworms, especially in the mosquito heavy Southeastern US. Are we seeing the beginnings of a resistance movement? In some cases, careful questioning of clients reveals some monthly doses of medication were not given, opening the door for potential infection. In other cases, medical records and client compliance appear to be complete, yet the pet is positive on the annual heartworm blood test. Heartworm preventive works by killing immature heartworm larvae that are spread by mosquitoes. In theory, a pet who receives medication each month should be protected and never have a positive heartworm test. Why then, do some dogs test positive? Many owners are quick to blame the heartworm preventives. They believe continued use of the drugs will create resistant worms and that will lead to an increase in positive cases

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Heartworm Disease Continues to Infect Dogs

Every year, veterinarians brace for a disease that has seriously affected our pets for many years. However this affliction is easily preventable using affordable and safe medications. Occurrences of Heartworms both in dogs and cats continue to escalate and the fee for treatment of (when recognized soon enough) is much more that the expense to prevent. So, how will you offer protection to your furry friend from the dangerous repercussions of this now widespread parasite?

Flash back to 150 years ago when a researcher very first detected the heartworm parasite in a dog. Then the parasite evolved and was then recognized in our cats 80 years ago. Even though heartworm prevention is available for both cats and dogs you would believe that we would experience a decrease in the number of cases, nonetheless every year hundreds of thousands of dogs and cats are diagnosed and frequently die too soon from this dreaded parasite. A number of authorities estimate that in North America alone, cases of heartworms in our pets may possibly be in the millions.
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The disease attributed to this heartworm residing inside of your pet’s heart is disastrous. Your pet could be infected with the solitary bite of only one mosquito. The worm can then migrate through your pet’s body finally taking up residence in your pet’s heart chamber and the blood vessels leading to the lungs. This leads to your pet’s heart being forced to pump harder to circulate the blood through his tiny body. The consequences to the lungs is even more severe with many pets gasping for breath as the lungs fill with fluid and tiny blood clots clog the vessels. Early warning signs can include coughing and exercise intolerance that some owners just attribute to the dog being lazy. Frequently, warning signs usually do not surface until the disease is well advanced and the dog is struggling with heart failure, fluid accumulation in the lungs and abdomen which could eventually lead to death.

In cats, it only takes one heartworm to cause harm. The first signs are asthma like symptoms and oftentimes vomiting that the owners will attribute to hairballs. Once that heartworm lodges in the lungs, it can result in the sudden death of the cat.

Treatment for heartworms is costly ranging from $500 for the smaller sized dogs, to well over $1500 for the larger breeds. Complicated heartworm disease with cardiac failure is even more expensive and oftentimes there is only a 10% chance of recovery in the severely affected dogs. As of yet, there is no remedy for cat heartworm disease, just supportive care.

Amazingly, veterinarians do have a remedy to this problem. Safe, effective heartworm preventatives are available in a variety of easy to use applications. What is even more amazing is that the cost of a lifetime of prevention for most pets is significantly less that a one-time treatment for the disease. So, why do pets continue to suffer and die from such a avoidable malady?

With all internet myths, two major hypotheses think that either the heartworm medications are failing or that the parasites are developing a resistance to the medications. While conspiracy theorists love these ideas, scientific evidence for either explanation is absent. Heartworm preventives possess a failure rate of less than 1 in 1 million doses. In addition, the complex life cycle of the heartworm does not lend itself to creating a natural resistance to the medications. The truth very likely lies in the memory of the owner to dispense the dose in a monthly manner and the warmer climate.

Rising temperatures in our climate has resulted in a prolonged mosquito season and a greater chance of transmission to our pets. Here in Houston, our mosquito season is all year round. Some places are currently experiencing more mosquitoes in previously mosquito-free locations. Irrigation of dry areas and expanded plantings of trees in certain locations might actually increase mosquito population. With a bigger number of mosquitoes, there is a greater risk of transmission of heartworm disease.

When all of the facts are reviewed, the simplest reason behind our failure to manage this dangerous parasite falls on the humans themselves. We simply do not give the preventive as we really should. Perhaps it is due to forgetfulness, or maybe one partner thought the other one administered it or even it might be because of the economic conditions as well as monetary limitations imposed on the family. Regardless of the cause might be, it can bring about serious repercussions for the health of our pets.

Thankfully, as pet owners, you do have powerful allies to help fight the war against heartworms. With the help of your veterinarian, you are able to find the ideal heartworm medication for your pet and your spending budget. Oral prescription drugs, like Heartgard, Sentinel, and Iverhart can be purchased. Additionally, there are topical medications for instance Advantage-Multi and Revolution that are formulated to also provide protection to your pet from both heartworms and fleas. Proheart 6 is additionally available as a long lasting injection. The prevention of this illness rests entirely on the pet’s owners to make sure the pet receives the prevention prior to the pet is actually exposed to the parasite. That means that this prevention should get started in puppy-hood and be administered each month, all year long.
Trifexis is now available and is a chewable tablet that covers heartworms, fleas, and intestinal parasites. I now use Trifexis on my own dog.

You should not waste time looking for “natural” or organic ways to defend against heartworms; they simply just do not exist. Some people believe they can formulate ivermectin to give to their pets, but improper dilution and storage can cause overdosing or underdosing. Adhere to recommendations by your veterinarian and the American Heartworm Society (www.heartwormsociety.org). Your pet is counting on you and prevention is far better and less expensive ın comparison to the treatment.

Battle Against Heartworms Getting Tougher!

Every month, lots of dog owners, and a few cat owners, give their pets some form of heartworm prevention. But recent studies are showing increasing numbers of heartworm positive pets across the country. Some people believe the worms now have the upper hand. Has our trusted protection failed us?
6438939571380615 Battle Against Heartworms Getting Tougher!play Battle Against Heartworms Getting Tougher!
Dog owners, and a growing number of cat owners understand that once -a-month heartworm preventives keep their pets safe from a very serious cardiovascular parasitic disease. Despite consistent use of preventive medications, a significant number of dogs are testing positive for heartworms, especially in the mosquito heavy Southeastern US. Are we seeing the beginnings of a resistance movement?

In some cases, careful questioning of the clients reveals some monthly doses of medication were not given, opening the door for potential infection. In other cases, medical records and client compliance appear to be complete, yet the pet is positive on the annual heartworm blood test.

Heartworm preventive works by killing immature heartworm larvae that are spread by mosquitoes. In theory, a pet who receives medication each month should be protected and never have a positive heartworm test. Why then, do some dogs test positive?

Many owners are quick to blame the heartworm preventives. They believe continued use of the drugs will create resistant worms and that will lead to an increase in positive cases. On the surface, this theory appears to have merit. After all, we know that improper and excessive use of antibiotics can create resistant bacteria.213266 f520 Battle Against Heartworms Getting Tougher!

But according to an article in Veterinary Parasitology, heartworm resistance should not occur. The authors looked at the life cycle of the heartworm, genetic mechanisms of resistance as well as the timing and dose of the heartworm medications. Their conclusion shows the current medications are unlikely to select for any sort of genetic resistance among the heartworm parasite. In other words, it is doubtful current heartworm preventive practices are causing any resistance. So, what is happening with these heartworm positive dogs?

As unpopular as it sounds, pet owners and veterinarians may have to share the blame. A pet owner who fails to purchase enough preventative medication is putting their pet at risk. Also, research shows that nearly 50% of dog owners who buy heartworm prevention do not give the medication as directed.

Likewise, a veterinary clinic that fails to remind their clients about the importance of year-round prevention is doing a disservice to the pet as well. In order to avoid conflict with pet owners, some veterinary staff might overlook the fact that the owner has not been consistently purchasing heartworm prevention.

Even our pets are not entirely blameless. Pets that take oral medication and “bury” it or spit it out won’t benefit from its protection. Also, if your pet has an upset stomach the day you give the medication, the complete dose could be lost in a bout of vomiting or diarrhea.

In all of this negativity, there is good news. Experts state that the heartworm preventive failure rate is less than 1 in a million; meaning that if your dog takes his medication routinely, the chances of developing heartworm disease is almost non-existent.

Additionally, veterinarians have multiple options available to clients for providing protection to their pets. Monthly chewable tablets, like HeartGard Plus, are available along with topical formulations such as Revolution and Advantage Multi, for more finicky pets. The new Trifexis is now my preferred heartworm prevention here in Texas because in includes flea control, intestinal parasite control and flea prevention in a chewable tablet that my dog loves. There is even an injection, called ProHeart 6, that can provide six months of protection from heartworms, but it does not have any protection against fleas.

Finally, all of the manufacturers of heartworm preventive medication guarantee their products. They will pay for heartworm disease treatments if your dog tests positive.

Sometimes, it’s easier for people to blame the product rather than admit to a very common mistake, but the fact is pet owner compliance problems may be the biggest reason for more pets with what appears to be heartworm preventive failure.

Regardless of the reason, follow your veterinarian’s advice about heartworm prevention. As always, your family veterinarian will have the best advice. Beware of Internet sites circulating unfounded rumors and opinions from dubious sources.

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