Allergies in Dogs

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005 300x225 Allergies in DogsFrom springtime through the late fall, many people are subject to seasonal allergies. But people are not the only ones suffering. For our dogs and cats, these same seasons can bring intense itching and discomfort. Yes, it seems our pets can get their own “hay fever”.

It’s a very frustrating and somewhat common situation. Pet owners by the millions flock to their veterinarians in the hope of relieving their pet’s itchiness. For many people, the constant chewing, licking, and scratching can test their love for their pets.

Current estimates show that about 20 million pets suffer from some sort of skin condition and many of these are allergies. Allergies are an over-reaction of the body’s immune system to a foreign substance, such as pollen or flea saliva. For people with allergies, we sneeze and sniffle as our bodies respond to histamine released by immune cells. These symptoms are due to the reaction of histamine with receptors in our nose and upper airways.

Our pets, however, react somewhat differently. Dogs and cats have many more histamine receptors in the skin and fewer in the nose. As histamine is released, the receptors cause an itchy feeling and the pet reacts by scratching at that site. Scratching can generate more histamine release, thereby causing more scratching. The constant assault on the skin by the pet’s claws can actually damage the skin, leading to bacterial infections. Areas of hair loss and oozing sores known as “hot spots” are very common with allergies.

Fleas are often found to be the reason for a pet’s itchiness. However, the pet who is truly allergic to fleas will often appear to have no fleas at all! Why? Because these pets are the ultimate flea catchers, doing everything in their power to bite or scratch the discomfort of the flea away. The flea’s saliva sets off an allergic reaction leading to a flurry of chewing and digging at the skin.

Allergies to airborne substances, such as pollen and mold spores, are another reason for itchiness in pets. This is known as atopy and affects many pets from springtime straight through until fall. This condition can be inherited in certain breeds.

If your pet has signs of allergies year round and you see little or no improvement with certain medications, you may have a pet that has food allergies. Contrary to popular belief, food allergies take time to develop and are not due to recent diet changes. Most pets who develop food allergies have been eating the offending food with little problem for years. Common food allergens can include any major protein or carbohydrate source in the pet’s food.

In some mild cases, the itchiness can be treated with anti-histamines or even steroids for a short period of time. However, pet owners need to be aware that allergies are not a condition that can be cured. The good news though, is that they can be well-managed with a team effort from the pet owner and the veterinary team.

Utilizing diagnostic tests such as blood testing and even skin allergy tests, veterinarians can often find ways to reduce the pet’s discomfort level. In some cases, your family veterinarian may refer you and your pet to a veterinary dermatologist. This specialist has many more diagnostic and treatment resources available to bring relief to your pet. In all cases, you, the pet owner, are a vital part of the team. It will be up to you to make sure that all pets in the household are treated for fleas or that your pet stays on the recommended hypo-allergenic diet and doesn’t sneak other treats!

Allergies are not only one of the most frequent reasons for a trip to the veterinarian, but are also a big reason for pet owners becoming frustrated with their pet. Working with your veterinary team to identify what is causing your pet’s symptoms will help keep your four-legged family member right where he needs to be…with you!

Ringworm in Pets

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Not Really a Worm At All
Ringworm, technically called dermatophytosis or dermatomycosis, is a skin condition that can be transmitted between people and pets. It is caused by one of several kinds of microscopic fungal organisms. The disease gets its confusing name from the fact that a common symptom in people is the appearance of a reddish ring on the skin which was once thought to be cause by a worm.

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Ringworm in Pets
Ringworm fungi can infect dogs, cats, rabbits, farm animals, and other mammals. Pets with ringworm often have areas of hair loss. The skin in these areas may become crusty or scaly, and the hair breaks off easily. The lesions increase in size quickly and can spread over the entire body. However, some infected animals, especially cats, do not show any symptoms at all.

Ringworm is diagnosed by the appearance of the lesions, plus the results of one or more tests. Some types of ringworm will glow under ultraviolet light. Hairs or a skin scraping from the affected area can be examined under the microscope to look for the fungal organisms. The most sensitive test is culturing; hairs are applied to a growth media and observed for development of the ringworm fungus.

Mild cases of ringworm can be treated with topical antifungal creams. Sometimes it is beneficial to shave the affected area prior to application of the medication. Antifungal shampoos and dips are also available. In more severe cases, hair is shaved from the entire body of the pet and repeated shampoos or dips are performed. Oral medication may also be prescribed in these more serious cases. A ringworm vaccine is available for cats but is not helpful in all cases your veterinarian can advise you whether it would be of benefit.

A telltale ring-like marking on the skin is the most common sign of ringworm in people. Lesions can be seen on the skin or on the scalp. In people, the disease is also called tinea. Most people recover quickly from this condition, especially with treatment.

Ringworm in people is mainly diagnosed by the appearance of the lesions, but a skin scraping may be performed to confirm the disease.

Most human cases of ringworm are treated with a simple antifungal cream applied to the lesion. Keeping the skin clean and dry is also helpful. Because people are not as hairy as pets, the condition is more easily treated in humans, and most people recover within a few weeks. People who are properly applying antifungal medication are generally not considered contagious during treatment. Unless your doctor advises otherwise, it is usually OK to go to school or work.

Preventing the Spread of Ringworm
Ringworm is highly contagious. The fungus produces spores on the skin or hair these tiny spores can fall off and survive in the environment for long periods of time. People and pets may be exposed to the spores by contact with other people, pets, or soil. Ringworm can be spread by objects such as brushes, combs, unwashed clothing, and in showers and pools.

People most commonly get ringworm from other people. Avoid sharing brushes, combs, or clothing. Wear sandals when using public showers. Keep your skin and hair clean and dry.

Animals can also be an important source of infection. Avoid handling stray animals showing signs of ringworm. Pets with signs of ringworm should be seen by the veterinarian, tested, and treated. During treatment, minimize handling of the animal and keep it separate from other pets. Infected pets can be contagious even after the obvious symptoms have resolved, so it is important to use medications for the full duration prescribed and see your veterinarian for follow-up testing. Some animals, most commonly cats, can be carriers of ringworm without showing symptoms. If you become infected with ringworm and the source of infection is unknown, your doctor may recommend having your pets tested.

Ringworm in Cats

ringworm2 Ringworm in CatsRingworm is not a worm but a form of a microscopic  fungus that affects animals and humans. Technically called dermatophytosis or dermatomycosis, the name ringworm was given because the ringworm lesion on people sometimes appears as a reddish circular area surrounding a crusty spot and it was once thought to be caused by a worm.

Ringworm is caused by many different species of fungus that can be picked in the environment or from other infected animals.  The most common species of  ringworm is caused by Microsporum Canis. The lesions can vary in appearance from patchy hair loss, to crusty spots to no signs at all.

Ringworm in your cat can sometimes be diagnosed with a woodslight (ultra violet light or blacklight). The fungus growing on the hair shafts will glow a lime green color when exposed to the light. Sometimes, the fungus cannot be detected by the light and special fungal cultures will have to be done. If there are lesions on the cat, a few hairs and crusts are placed on a special culture media to promote the growth of the fungus. If no lesions can be found and the owner suspects a cat for giving ringworm to the family, a sterile toothbrush is used to catch any loose hair and then the hair is placed on the culture media.

 

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Anywhere from a few days to 2 weeks, if there was a fungus present it will grow on the media much like bread mold on old bread. The fungus also will turn the media a reddish color if it is M. Canis. The spores on the media are then microscopically examined with a special stain to verify the species of the fungus and to be certain it was not just an environmental contaminant.145496 Ringworm in Cats

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If ringworm is verified on the cat or kitten, medicated shampoos can be used to help control the ringworm. Treatment is done for 6 to 8 weeks . Oral anti-fungal medications can also be used if the ringworm is generalized.  To avoid contaminating the environment with further spores, sometimes the cat will be shaved.

Most people do not get ringworm from their pet, but from the environment. The fungal spores are present at swimming pools, parks and anywhere where people congregate. If a pet is diagnosed with ringworm, treatment by medications will hasten recovery and further exposure to people and pets can be limited by environmental clean-up. If you have multiple cats in a household with the ringworm, clean-up will prove to be challenging.

  • All contaminated toys, food bowls, blankets, cages, scratching posts, bedding should be removed.
  • Any item that cannot be disinfected should be discarded or destroyed.
  • All items that can be washed should be washed with an anti-fungal soap, rinsed and then soaked in diluted bleach (1 part bleach to 30 parts water) for 10 minutes, and then repeated 3 more times.
  • Rooms should be cleaned including walls, ceilings, furnace vents, filters, under furniture, beds and refrigerators.
  • All surfaces should be vacuumed, scrubbed and bleached.
  • Change furnace and AC filters weekly.
  • Clean the ducts and vents with a commercial duct cleaner.
  • Rugs should be washed with an anti-fungal soap. Steam cleaning alone is not reliable, add a disinfectant to the solution to kill the fungal spores in your carpets.
  • Quarantine affected cats until the ringworm is gone.

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