Preventing Hot Spots
Learning to prevent these wounds is a better goal than treating them.
Upon waking up one morning many years ago, I greeted Mandy, my six-year-old tri-color Collie, who slept beside my bed. As I leaned over to stroke her luxurious black coat, I gasped. There was an angry, oozing sore the size of a grapefruit on the outside of her right hind leg. It was cherry red, inflamed, and looked incredibly painful. I was horrified. I worked at a humane society at the time. This looked like the kind of wound we would investigate an irresponsible owner for, for not providing proper care and attention! I was sure it hadn’t been there the night before. What had happened to my dog? I rushed her to my veterinarian.
Mandy had a “hot spot,” due to, according to my vet, a flea allergy. I felt terrible. I was a bad dog owner. Even when my veterinarian assured me that it didn’t mean Mandy was infested with fleas, that a single flea can trigger an allergic reaction in a flea-sensitive dog, I still felt like I had somehow neglected her.
We treated the wound, it healed without complication, I tried to improve my flea-control methods, and Mandy never had a recurrence of the ugly condition. We were lucky. It’s not always so easy to win the hot-spot battle.
What is a hot spot?
A hot spot, according to Terry G. Spencer, DVM, of the Animal Health Center in Salinas, California, is known formally as “acute moist pyoderma,” and is a signal of an underlying skin disorder. The most common disorder is a flea allergy, but hot spots are also linked to other conditions such as food allergies, poor nutrition, and thyroid disease.
Acute moist pyoderma is caused by the microorganism Staphylococcus intermedius. The organism is commonly found on the skin, and opportunistically takes advantage when the integrity of the skin is compromised by some underlying disorder. The skin is an organ whose vitally important function is to form a protective covering for the rest of the body, preventing the entry of foreign organisms that can infect and destroy the other organ systems. It’s our dog’s primary armor against any kind of bad bug. (And ours!)
When the staph. organism invades the skin at a weakened point (such as a flea bite in an allergic dog) it produces endotoxins that are destructive to skin cells. The body’s immune system kicks into high gear, sending an army of mast cells, histamines and other defensive bodies to the site of the hot spot. As the ensuing battle rages, the damage spreads, killing and consuming the skin in the process. The red angry appearance of a hot spot is not simply a sign of irritated skin. The skin is actually gone.
“A hot spot is a critical medical emergency similar to the skin loss of a burn victim,” says Dr. Spencer. “It can occur within a few hours, is intensely itchy and painful, and can progress to life-threatening if not treated. I have seen lesions grow from the size of a quarter to baseball-size within hours, and I have seen dogs with their entire sides sloughed away by this condition.”
Dr. Spencer received her degree in veterinary medicine from Colorado State University in 1995, and worked at several California veterinary clinics prior to opening her Animal Health Center in 1998. She utilizes veterinary orthopedic manipulation, works closely with a human chiropractor who is certified in veterinary chiropractic, and is in training to receive her veterinary acupuncture certificate. She routinely integrates complementary modalities into her treatment protocols and is a firm believer in the holistic approach to veterinary care. Despite her strong interest and belief in complementary medicines, she treats hot spots traditionally because of the severity of the condition. Once the crisis is resolved she then uses a more natural approach to prevent further hot spots.
The standard veterinary treatment, according to Dr. Spencer, starts with clipping the hair around the affected area. The staph. organism is characterized by an oozing serum that congeals and mats the surrounding fur. Clipping makes it easier to treat the wound and keep it clean. Then the area is scrubbed with a disinfectant.
“It is important,” she cautions, “to use a disinfectant that is antiseptic (to kill the staph. and any other invading organism) but not caustic. I usually sedate the dog for this procedure because the hot spot is so intensely painful. Then I scrub with Chlorhexaderm or Betadine. Products like alcohol and peroxide must be avoided at all costs – they are extremely painful to an already excruciating wound, and peroxide will cause even more damage to the skin.”
After scrubbing the area, Dr. Spencer recommends application of a topical antiseptic/steroid spray such as Dermacool or Gentocin spray.
“It is critically important to halt the progression of damage as quickly as possible,” she says. “Until we kill the staph. organisms and calm the hyper-reacting immune system the skin will continue to be eaten away. You can use a more natural approach with an oatmeal spray, but you run the risk of letting the infection get out of control. I prefer to use emergency measures to halt the damage. Then I’ll talk to the client about how to improve the overall health of the dog holistically in order to minimize the chance of recurrence.”
The cortisone controversy
There is no question that steroids can do nasty things to our canine friends. Dogs are very sensitive to steroids. The powerful drug suppresses the immune system, which leaves the patient vulnerable to other problems that run the continuum from mild to serious – from a simple bladder infection to the potential for onset of diabetes.
Use of steroids can also be damaging to the adrenal system. Adrenal glands secrete steroids, and when these are administered medically it sends a signal to the adrenal glands to stop production. This can sometimes totally shut down the body’s production of steroids. Steroids also cause our dogs to pant more, drink more, urinate and eat more, and can cause subsequent problems with incontinence and weight gain.
Dr. Spencer thinks steroids are a good thing to avoid unless they are absolutely necessary. In her opinion, hot spots make the use of steroids absolutely necessary.
“I do use steroids topically for hot spots, and I may give one injection of a short-acting steroid for stubborn cases, but,” she adds, “I don’t give oral steroids. If an owner doesn’t give all the pills and keeps them in the cupboard, she may be too tempted to pop a few into her dog’s mouth the next time he’s a little itchy. This is a good way to get into trouble with steroids.”
Other holistic practitioners we queried were less enthusiastic – and even rather condemning – about even sparing use of steroids for hot spots. Steroids do effect quick healing, but at a cost; they act in a suppressive manner, rather than supporting the body’s homeostasis, or natural return to balance.
Once she has resolved the emergency through aggressive intervention, Dr. Spencer reverts to her holistic bias.
“The hot spot is just a symptom of an greater, underlying problem,” she reiterates. “Flea hypersensitivity is the most common cause, but there are others. Contact dermatitis can cause the condition. For example, people think tea tree oil is good for skin problems, but some dogs are highly allergic to it. I have seen a number of hot spots caused by contact with strong concentrations of tea tree oil. Also cedar allergies – many dogs are allergic to the cedar chips that are contained in some dog beds. Generalized allergies – food, pollens, anything that compromises the skin and the immune system – can provide the environment for the staph. organism to take hold. The constantly ‘itchy dog’ is the most likely victim for recurring hot spots.”
Dr. Spencer’s answers to the prevention question are simple: Use good flea control. Provide excellent nutrition. Identify allergens and reduce exposure. Maintain good grooming practices. Look for (and treat) signs of anything that might be suppressing the immune system, such as low thyroid. Do everything you would otherwise do to keep your dog in the peak of health. Healthy dogs are not likely to suffer from hot spots.
Flea sensitivity truly is the number one cause of hot spots. Regular flea combing, vacuuming, diatomaceous earth and nematodes are just some of the non-toxic, natural methods available for controlling those pesky bloodsuckers that can send out an open invitation for a staph. invasion. (See “Flee, Evil Fleas,” WDJ June 1998.)
Good nutrition not only aids in effective flea control, it also strengthens the body’s immune system, reducing the likelihood of allergy problems. The Omega 6 and Omega 3 fatty acids, given in the proper ratio (5:1), have been shown to fight inflammation and to help promote healthy skin. (See, “Essential for Health,” WDJ July 1999.) Speaking of healthy skin and coat, keeping your dog well-groomed – no oily, dirty skin – will also help stave off the staph.
Overvaccination is now suspect in canine skin allergies as well, so you might want to talk to your veterinarian about revisiting your dog’s vaccine schedule with an eye toward reducing the number of booster shots she gets. And, just like it does for us, exercise contributes to our dogs’ overall good heath and condition. If your pooch is a couch potato, it might behoove both of you to add a 20 to 30-minute aerobic hike up the hill to your daily routine.
The holistic philosophy says that organisms function as complete units that cannot be reduced to the sum of their parts. If your dog gets a hot spot, by all means treat the “part,” but then be sure to look beyond the immediate emergency to find the source of the problem. With hot spots, as with so many other health issues, if the complete unit is healthy it follows that the parts will also be healthy.
Also With This Article
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-By Pat Miller