Tuesday, November 28, 2017

Pet Foods

            It seems to me the pet industry has problems. It concerns pet foods. There are a lot of them, they are high profit items, and each product has a very active sales program. Talking with pet owners they often reiterate sales pitches I’ve seen or heard on television or the print media, extoling often unsubstantiated nutritional advantages, of some diet. Or that imply diets that contain certain proven nutrients are less wholesome than their product. Without education in biochemistry and nutrition one is at the mercy of the huskers. There are some companies i.e. Purina, Hills, Pedigree, and Royal Canin that have been in business for more than 50 years they make products, available in grocery stores that pet owners can rely upon.

            Some pets have unique nutritional requirements that need a special diet available only from veterinarians. In these cases, the veterinarian will be responsible for assuring that the diet he/she prescribes will meet the nutritional requirements of your pet. 

Thursday, November 9, 2017

Treating Rear leg Paralysis of Dogs

A dog that suddenly becomes paralyzed in the rear legs most often has had its spinal cord injured by a ruptured intervertebral disc. These are spongy tissues located between vertebrae of the back. It is crucial that such dogs are seen by a veterinarian within minutes or hours of paralysis onset. To delay examination and treatment for days results in paralysis becoming permanent condemning the dog to a lifetime requiring a two-wheeled cart for locomotion and months of rehabilitation. The veterinary profession recommends that early cases be subjected to surgical relief of the spinal cord compression. Some pet owners abide by this option but paralysis is a much too prevalent consequence.  It is most disconcerting to see such compromised pets struggling to get around. We have found that treating them medically, if started early, is the better choice that can return the dog to normal function.
For the affected dog, spinal cord inflammation is treated for one or two days with corticosteroids. Concurrently and thereafter the patient is given a synthetic antibiotic to counter cytokine formation in the injured spinal cord tissue while receiving vitamin support for metabolism in the damaged cells to keep them alive. Most affected dogs, when manually supported can stand by day five and if given careful, gentile assistance they learn to walk and by day ten are well on their way to normal locomotion running around our clinic and requiring no further rehabilitation. 

Bloody Urine

For two days she had seen Boots pass bloody urine in his litter box. That convinced her that the cat was suffering from bladder infection. On the third day she hustled him off to her veterinarian only to learn the cats’ malady was not infection but an inflamed bladder. Actually, when the veterinarian examined Boots’ urine with a microscope she could see no bacteria that could cause the bleeding. Urine sterility was confirmed by lack of bacterial growth on culture plates. There was no evidence of cancer or bladder stones, things that also cause blood in urine.
          It is not uncommon to examine both cats and dogs with an inflamed bladder but without infection. Cause of the inflammation in these cases has not been determined although many studies have been done. Treatment of these animals with antibiotics has been frustrating for although antibiotics may be helpful initially when they are stopped the bleeding tends to recur. Many years ago I was told that physicians sometimes treat patients with bladder cancer using a specific non-steroidal anti-inflammatory drug. I tried it on dogs and found it to be helpful. So then, I tried it on animals with inflamed bladders that had not been cured with antibiotic treatment.  Their bleeding stopped and never returned. I’ve been using the drug ever since. Be advised, not all non-steroidal drugs are helpful. We have found only one specific drug that works. To learn more please come into our hospital and we’ll talk about the problem.
Bring your dog in for a FREE Nexgard, a once a month flea and tick treatment. Please tell the receptionist where you learned about this valuable offer. Good for November and December!

Friday, November 3, 2017

Inflammasome Syndrome, A New Look at Illness

Many cats and dogs are brought to the hospital by owners with a history of not feeling well, their activity level is decreased as is their appetite. On examination, there may be apparent cause for their illness which is not unusual. We recognize these cases as inflammasome syndromes, and have been studying them for several years.
            Inflammasomes have been a part of illness for as long as man and animals have been getting sick. But the syndrome is only now being recognized, studied, treated, and reported in scientific journals. It involves the immune system. Infection, injury and systemic degeneration can all cause a collection of proteins called inflammasomes, to form in lymphocytes, a class of white blood cells. The inflammasomes release cytokines, of which there are about 100 types each with a specific contribution to inflammation and illness, such as fever, loss of appetite and malaise. We cannot quantitate cytokines as means of diagnosing the syndrome. Instead we rely upon the ratio of immature to mature neutrophils, another type of blood cell, and/or by understanding the pathology of an underlying inflammatory disease i.e. pancreatitis and infection.

            We have found that certain specific synthetic antibiotics counter cytokine effects and we use these drugs to treat animals with inflammasomes. Several days of treatment may be required to show effect, but usually recovers is complete with no adverse sequelae. Also, animals that have had no trauma to nervous tissue may produce cytokines in injured nerve tissues which further damages nerve cells. Treating these trauma cases with the synthetic antibiotics has been reported to limit cytokine activity and development of further pathology. We have confirmed this in our treatment of dogs with intervertebral disc herniation. 

Friday, October 27, 2017

Nervous System Disease Treated as an Infection

 Perhaps you have owned a dog or known of one with a disease of the nervous system called granulomatous meningoencephalitis (GMC).   Affected dogs may be un-coordinated, stagger, have neck stiffness, seem confused or have other signs indicating brain and/or spinal cord involvement.  Veterinary medical texts claim it is an autoimmune disease in which the body is destroying the nervous system and recommend sick dogs be treated with prednisolone or some other immune depressing drug to depress the immune response.  But this is only effective during treatment once that stops symptoms resume or the dog dies.

     Here in the Imperial Valley I encounter a case about once a month.  And true to the medical books’ prophecy therapy with immune depressing drugs has been unsatisfactory.  Could it be that the nervous system degeneration is the body’s aberrant response to some unknown virus infection?  To test this conjecture sick dogs are given an injection of a corticosteroid along with a human drug that inhibits virus infections.  Also, they receive a synthetic antibiotic to limit inflammation and a couple of vitamin-like compounds to facilitate metabolism of disease-damaged nerve cells.  With 30 days of treatment patients return to normal suggesting that virus infection may be the underlying cause of GMC and that the virus-inhibiting drug is effective. 

Congenital Heart Disease in a Young Dog

He was less than a year old. His shiny black coat indicated he had been well cared for and was ready for the good life Labrador Retrievers enjoy. But as he lay on the examination it was obvious he was very sick. He had become acutely ill and as he turned toward me his eyes seemed to say, “It’s no use, Doc”.
          With mouth halfway opened he gasped for breath, but there was no sound of rushing air. I could not feel the femoral pulse. Nor, could I hear the heart beat with a stethoscope. These two signs indicated the heart was not adequately pumping blood. However, the electrocardiogram was not unusual. It could not define the type of heart disease, and he was too ill to do chest radiographs that might be instructive. There were sounds of air movement in the lungs, vesicular sounds, detectable with the stethoscope but no rates or creptations. This and his gasping for breath suggested the lungs were filling with fluid escaping from his blood. This is called pulmonary edema. The dog was treated for dilated cardiomyopathy, a common form of heart failure. And, although he was not coughing he was also treated for influenza, a virus infection which can cause pulmonary edema even though heart failure was considered to be a more likely primary cause of his symptoms.

          He died during the night. The necropsy next morning showed his lungs were indeed edematous. Enough so that, it was obvious he had drowned in fluids that escaped into his lungs from blood vessels due to stasis of blood flow that complicated inadequate heart function. The heart disease was not dilated cardiomyopathy. Rather, it was hypertrophic cardiomyopathy; a condition in which heart muscle cells proliferate increasing heart wall thickness. Scar tissue may form further compromising cardiac contraction. Eventually these changes lead to heart failure and death of the victim. Rare in dogs, it is common in cats in which it is thought to be inherited. I was told litter mates of this dog all died suddenly but no diagnosis of cause of their deaths was rendered. These deaths suggest hypertrophic cardiomyopathy in this young litter was inherited. As a rule, therapy of dogs terminally ill with this disease is not effective. Management of the disease is by prevention. Avoid mating of known carriers. 

Periodontal Disease

She was brought to the hospital because she had been sneezing for a week and the owner wanted it stopped.  This was the first time I had seen Trixy, an old, overweight Miniature Poodle. At first I thought she might have a chronic infection somewhere in the nasal cavity that was causing her to sneeze or maybe cancer in the back part of the nasal cavity.  With these problems one often sees intermittent bleeding from the nostrils and there may be reverse sneezing as if there was exudate draining backward into the throat, but this hadn’t happened.  Then, when Trixy was put on the floor, she did a forward sneeze trying to clear something from the front of the nasal cavity.  That was different, not what I expected. The teeth were the cause of the problem!  I could see they were massively caked with a greenish-gray scale that had accumulated over years.  It was accompanied by periodontal disease and that infection had progressed down the teeth causing them to become loose and painful.  In Trixy’s case, infection around the roots of the large canine teeth had eroded into the nasal cavity creating fistulas (holes) so that pus drained into the nasal cavity, causing poor Trixy to sneeze.  To treat this condition one can administer antibiotics which may control the infection temporarily only to have it resume when the antibiotic treatment ceases.  Another way veterinarians solve Trixy’s problem is to stop the flow of pus by cleaning the teeth with ultrasound (brushing won’t do), extracting teeth that are loose or infected and then, surgically close the fistulas between the mouth and the nasal cavity. 

Prevention by routine tooth cleaning is the preferred management of this disease.  Twenty years ago many dogs had fistulas between the mouth and the nasal cavity that developed when canine teeth with severe periodontal disease fell out.  This condition was especially common in small lap dogs that lived indoors and ate human table food.  But over time owners of these small dogs have eliminated table food diets and fed nutritionally balanced commercial dog food which has prevented bone degeneration around the teeth from developing.  They also have had their pet’s teeth cleaned routinely by a veterinarian.