In addition to allergies, there are other diseases which can cause your dog to scratch, lick, or pull on his hair. A short description of these conditions such as mange, cancer, behavioral problems, and infections, along with their diagnosis and treatment, are included in the table below. Many of the more uncommon conditions are listed as well. This large number of conditions helps you understand why a quick diagnosis may be difficult to make and various diagnostic tests may need to be performed. The most common conditions causing licking and scratching are color-coded gray in the table (some may be more common in certain geographical areas).
Condition
Description
Symptoms
Diagnosis
Treatment
Acanthosis nigricans
Inherited form seen in Dachshunds; secondary form caused by friction, hormonal abnormalities, or hypersensitivities
Darkening of the skin; in secondary form see scratching and hair loss
History, physical exam; in secondary form, testing to determine underlying cause
Primary: No treatment; Secondary: Treat underlying disease; in some cases, steroids and Vitamin E supplementation
Acral lick dermatitis (neurodermatitis)
Self-licking in dogs results in self-trauma; possible causes include anxiety, boredom, stress (e.g., new member in household); licking can develop into an obsessive behavior
Red, hairless, well-circumscribed, sometimes raised lesion usually on the leg; if chronic, will drain
Exclude other causes; history important
Relieve underlying cause e.g., anxiety; restrict licking, e.g., Elizabethan collar
behavior modifying medication may be necessary
Allergic and irritant contact dermatitis
An allergic reaction following exposure to antibiotics applied to the skin; metals such as nickel; materials such as rubber, wool, and plastic; and chemicals such as dyes and carpet deodorizers; or inflammation caused by irritating substances such as poison ivy. Generally requires multiple exposures.
Red skin and small bumps or blisters on the areas of skin that are sparsely haired and directly exposed to the offending substance; itching; hair loss in chronic conditions
Patch test, exclusion trials
Restrict exposure to the allergen or contact irritant in the dog's environment; steroids, antihistamines
Atopy (allergic inhalant dermatitis)
Allergic reaction to something airborne, such as pollen, house dust mites, and mold
Licking of feet, inflamed ears, itching, redness, and hair loss; sometimes development of infection or hot spots
Intradermal or serologic (blood) testing for allergies
Reduce exposure to allergen (what the dog is allergic to); steroids, fatty acid supplements, biotin, antihistamines, shampoos, or immunotherapy
Bacterial infection (pyoderma)
See Folliculitis, Staph hypersensitivity
Often occurs as a result of another condition such as a parasite, allergic, or hormonal condition
Bee, wasp, hornet stings
Skin reactions can vary dramatically in severity
Immediately after the bite, see swelling, redness, pain, possibly itching; subsequently may develop extensive ulcers with draining; may develop hives or anaphylaxis
History, physical exam
Antihistamines, steroids; wet dressings, if ulcerated; protect the area from self-inflicted trauma
Calcinosis cutis
Mineralization of the skin usually due to an excess of corticosteroids; also rarely occurs in kidney failure, or in granulomas and tumorsHard nodules and papules usually on the back, groin, or axilla ulcerate, drain, and develop crustssevere itching; may become infected; often see other signs of Cushing's disease
Skin scrapings, biopsy, history, and other clinical signs, adrenal gland function tests
If due to glandular tumors, selegiline, o,p-DDD (Mitotane), or surgical removal of tumor; if due to high steroid doses, withdraw use of steroids slowly
Cheyletiella (rabbit fur mite) mange
Infection with the Cheyletiella mite
Itching, scalinesssome hair loss, if severe
Skin scraping and microscopic examination - the mite is often very difficult to find
Pyrethrin, Permethrin (Do NOT use permethrin on cats.)
Chiggers (harvest mites)
Seasonal disease caused by larvae of the chigger
Itching, bumps usually on feet, abdomen, folds at base of ears
Visualization of mite larvae or microscopic examination of skin scraping
Pyrethrin, Permethrin (Do NOT use permethrin on cats.)
Demodectic mange(red mange, puppy mange)
Infection with the Demodex mite - occurs when the immune system is deficient
Hair loss, scaliness redness, pustules ulcers, sometimes itching, darkening of the skin
Skin scraping and microscopic examination
NO Steroids
Amitraz (Mitaban) dips
Drug or injection reaction
Rare skin reaction to a drug which is inhaled, given orally, or applied topically more common with penicillins, sulfonamides, and cephalosporins; usually occurs within 2 weeks of giving the drug
Can vary widely and may include itching, hair loss, redness, swelling, papules crusts ulcers and draining wounds
History of being treated with a drug, symptoms, biopsy
Discontinue offending drug; treat symptomatically
Ear mites
Infection with Otodectes
Intense itching of ears, redness, dark crumbly discharge in ears
Direct visual or microscopic examination of ear discharge
Clean ears and apply medication containing pyrethrin (Ear Miticide)
Epitheliotropic lymphoma (mycosis fungoides)
Rare cancer T lymphocytes seen in older dogs
Can take multiple forms: redness with itching and scale ulcers and loss of pigment; one or more nodules; oral ulcers
Needle or other biopsy
Poor response to treatments, which include chemotherapy, surgical removal, retinoids, fatty acids
Flea allergy dermatitis (flea bite hypersensitivity)
Severe reaction by the animal to the saliva of the flea
Intense itching, redness, hair loss, papules crustsscales sometimes development of infection or hot spots
Presence of fleas; reaction to intradermal testing
Flea control in the environment and on the dog; steroids and antihistamines for the itching
Folliculitis
Infection of the hair follicles often with staph bacteria; symptoms usually appear on skin with less hair, such as the abdomen (belly)
Pustules form in follicles and break open to form 'bull's-eye,' 'annular,' and 'target lesions,' which have crusty centers and red or darkening on the periphery, and 'epidermal collarettes,' which appear as rings of scaly skin; itching may occur; short-coated breeds may develop small tufts of hair which are lost; breeds with long coats may have seborrhea
Skin scraping; culture; biopsy
Antibiotics for at least 4 weeks - continue antibiotics 10 days beyond the apparent cure; if recurs, look for underlying problem such as allergy or hormonal imbalance
Food Allergies
Allergic reaction to something in the diet
Licking of feet, inflamed ears, itching, redness, and hair loss; sometimes development of infection or hot spots
Food elimination trials
Change in diet
Hookworms
Infection with the larvae (immature forms) of hookworms
Red bumps, usually on feet, rough foot pads, abnormal nail growth, itching
Physical exam, history of poor sanitation
Treat for intestinal infection; move dog to different environment
Hot spots (acute moist dermatitis)
Result from allergies, flea bites, mange, anal gland disease, poor grooming, ear infections, plant awns or burrs, arthritis
Hair loss; red, moist, oozing skin; constant licking or scratching
Physical exam and history
Treat underlying condition; clean area; apply Domeboro solution; topicaland /or oral antibiotics and steroids
Lice
Infection with several species of lice
Variable; itching, hair loss, crusts rough hair coat
Finding lice or nits on skin or hair
Pyrethrin, ivermectin (off-label use*), Permethrin (Do NOT use permethrin on cats.)
Lymphoma
Common cancer in dogs; can involve the skin
Itching, ulcers nodules, redness
Biopsy
Surgery, chemotherapy, radiation; lymphoma of the skin does not usually respond to treatment as well as other lymphomas
Malassezia
Usually follows some other underlying disease
Itching, redness, hair loss, greasy scales if chronic, develop hyperpigmentation
Skin scraping/smear and microscopic examination, culture
Treat underlying disease; oral ketoconazole; miconazole shampoos
Pelodera dermatitis
Accidental infection with larvae from a non-parasitic worm that lives in straw and other organic material
Affects areas of skin touching ground; intense itching, redness, hair loss, papules crusts scales
Skin scraping and microscopic examination
Remove bedding; mild antibacterial shampoo; steroids if necessary to control itching
Pemphigus foliaceus
The most common form of pemphigus in the dog; an autoimmune disease; some breeds are at increased risk
Often affects feet and head; starts with pustules and progresses to severe crusting depigmentation of the nose is common; itching may occur; if footpads and nails affected often see lameness; symptoms wax and wane; severely affected animals may have fever and loss of appetite
History, physical exam, skin scraping and biopsy
Corticosteroids, other immunosuppressive therapy, gold injections
Pyoderma-superficial
See Folliculitis, Staph hypersensitivity
Ringworm
Infection with several types of fungus
Hair loss, scaliness crusty pustules vesicles some itching; can develop a draining nodule called a 'kerion'
Culture
Miconazole, lime sulfur dips; oral griseofulvin or itraconazole
Sarcoptic mange
Infection with the Sarcoptes mite
Intense itching and self-trauma, hair loss, papules crusts scales
Skin scraping and microscopic examination - the mite is often very difficult to find
Amitraz (Mitaban) dips (off-label use*); ivermectin (off-label use*)
Schnauzer comedo syndrome
Uncommon; only seen in Miniature Schnauzers
Comedones (black heads) on back, mild itching; may see secondary infection thinning of hair; small crusts may develop
Clinical signs, breed, skin biopsy
Long-term antiseborrheic shampoos; sometimes antibiotics and retinoids
Sebaceous adenitis
Sebaceous glands are destroyed, cause unknown; certain breeds more susceptible
Short-haired breeds: circular areas of hair loss with fine scale long-haired breeds: more widespread hair loss and scale, hair mats easily; may see itching in all breeds
Clinical signs, breed, skin biopsy
Antiseborrheic shampoos, fatty acid supplements; in more severe cases, steroids, retinoids
Seborrhea
Can be primary (inherited) or secondary (resulting from other disease processes such as allergies, hypothyroidism)
Scales; depending upon the type, may have a dry or oily coat; odor; some scratching; may see hair loss
Blood tests, skin scraping, etc., to find underlying cause
Treat underlying cause if present; antiseborrheic shampoos; fatty acid supplements
Skin cancer
See Lymphoma
Skin fold pyoderma (intertrigo)
Inflammation of skin that contacts other skin, e.g., lips, facial folds (on Bulldogs, for instance), vulva, tail, toes, and bodies of obese dogs
Red, oozing area; crusts often becomes infected and may develop odor
Clinical signs; skin scraping and tape impression smears
Clip and cleanse area; keep area clean; medicated shampoos; topical antibiotics; treat underlying condition, e.g., increased tears from eye disease, obesity, allergy
Staph hypersensitivity
Rare disease in dogs caused by an allergic reaction to the bacteria Staphylococcus; often occurs in the presence of other skin diseases
Red skin, pustules vesicles severe itching, and sometimes crusts
Culture, biopsy, intradermal allergy test
Treat any underlying disease; antibiotics
Superficial necrolytic dermatitis of Miniature Schnauzers
Skin reaction to shampoos (usually insecticidal or medicated)
Papules ulcers with drainage; develop 2-3 days after exposure to the shampoo; may also see fever and depression
Breed, history of exposure, clinical signs
Treat symptomatically
Tail dock neuroma
Nerve regrowth after tail docking causes symptoms
Nodule at site of docking, itching with self-mutilation, hair loss, and hyperpigmentationHistory and symptoms
Surgical removal
Tick bites
Ticks cause a local inflammation in the skin, even when the entire tick is removed
Nodule and redness at site of the bite; may itch and develop crusts may last several months
History
Remove the tick; use a tick preventive; allow nodule to resolve on its own
Urticaria (hives)
Reaction, often allergic, to insect bite, drug, vaccine, sunlight, etc.
Multiple swellings, with hair standing up over swellings; may itch
History, physical exam
Often resolves on its own; in the case of allergic reactions, antihistamines, epinephrine, or corticosteroids depending upon severity
* off-label use: medication used to treat a condition for which it was not developed (or licensed). A large number of medications fall under this category. Research has almost always been performed to determine the effectiveness and safety of the product, but the manufacturer has not undertaken the lengthy process required for licensure.
References and Further Reading
Birchard, SJ; Sherding RG (eds.) Saunders Manual of Small Animal Practice. W.B. Saunders Co. Philadelphia, PA; 1994.
Greene, CE (ed.) Infectious Diseases of the Dog and Cat. W.B. Saunders Co. Philadelphia, PA; 1998.
Griffin, C; Kwochka, K; Macdonald, J. Current Veterinary Dermatology. Mosby Publications. Linn, MO; 1993.
McKeever, PJ; Harvey, RG. Skin Diseases of the Dog and Cat. Iowa State University Press. Ames, Iowa; 1998.
Paterson, S. Skin Diseases of the Cat. Blackwell Science Ltd. London, England; 2000.
Paterson, S. Skin Diseases of the Dog. Blackwell Science Ltd. London, England; 1998.
Scott, D; Miller, W; Griffin, C. Muller and Kirk's Small Animal Dermatology. W.B. Saunders Co. Philadelphia, PA; 1995
"Sarcoptic Mange - You Can Get It"
"Mange" is a non-descript term used to imply a condition caused by mites on or near the skin surface. This week we will discuss "Sarcoptic Mange" which is caused by a tiny burrowing mite called Sarcoptes scabiei variety canis in the dog (the "itch mite") and Notoedres cati which is quite similar and the cause of head mange in the cat. Dogs, hogs, cattle, horses, sheep, man, etc. all have their own individual varieties of Sarcoptes mites which affect them; hence the names Sarcoptes scabiei var. canis, Sarcoptes scabiei var. bovis, Sarcoptes scabiei var. suis, etc.
"Sarcoptic Mange" the Disease
As will be described below in the life cycle of Sarcoptes scabiei, these mites like to tunnel in the upper layers of the skin. When they do so they cause the host to become sensitized and an intense inflammatory reaction occurs. This results in an aggravating itch for the infested host. The constant scratching results in hair loss and damage to the skin by self-mutilation. Although the lesions start on the thinly haired areas such as the ears, muzzle and around the eyes, if let go the condition can spread over the entire body. Serum ( the clear component of blood) seeps out of the tunnels to the surface of the skin and causes thick scabs to form. Secondary bacterial infection usually occurs causing pus to accompany the scabs. "Not a pretty picture".
Diagnosis
Diagnosis is accomplished by deep skin scraping in 12 or more affected sites. The skin must be scraped in numerous sites at the very edges of the advancing lesions. This is because the mites are usually at the head of the tunnels beneath the skin. Occasionally, Sarcoptes mites can be very difficult to retrieve and the animal is treated based on the characteristic lesions and the response to therapy.
The life cycle of Sarcoptes scabei mites
As can be seen in the image below, Sarcoptes mites spend their entire life on or in the skin. The male and female copulate on the skin surface and the male soon dies off. The female then burrows into the upper layer of skin (stratum corneum) and begins forming a honey-comb of tunnels. As she tunnels along eggs are laid that fill the tunnels. Adult mites feed on the serum (clear component of blood) that oozes into the tunnels from the surrounding irritated tissue. When the female mite completes her egg laying mission she dies at the end of the tunnel. The eggs soon hatch to form larvae and then molt to become nymphs. The larvae and nymphs also feed on serum and skin debris. When the nymph makes a final molt to become an adult they return to the skin surface where they mate and start the life-cycle over anew. Transmission from animal to animal is thought to be through direct contact. Dog and cats in close contact with an infected host are succeptible. Animals can also become infected from fomites e.g. infested pens and blankets, combs, brushes, collars and any upholstered surfaces. Young and poorly nourished animals are the most succeptible to infection.
How is Sarcoptic Mange treated?
The Pet
Sarcoptic mange is fairly easy to kill with dips (Amitraz), pour-on miticides (alcohol based Ivomec), or oral products (Milbemycin - Interceptor). The condition also may need to be treated with an antibiotic for the secondary bacterial infection and corticosteroids to decrease the intense itch and inflammation.
The Environment
Adult Sarcoptic mange mites can live for 21 days in the environment without feeding. For that reason all brushes, combs, collars, bedding, carpeting and upholstered surfaces must be sprayed with an insecticide. Household flea treatment products effectively kill the adult mites. One or two thorough applications generally destroys adults in the environment.
Can people get Sarcoptic Mange?
Yes! Ever hear of the "Seven Year Itch"? That's another term for Sarcoptic Mange in humans. Like pets, humans have a particular variety of mites that can cause advanced " Sarcoptic mange". This is totally separate variety from the ones that cause "mange" in dogs and cats; however, if the variety of mange mite that affects dogs and cats gets on a human it can cause a nasty red welt just like a mosquito bite. Several of these bites can be rather troublesome. Since these varieties are not well adapted to humans, they do not produce the extensive tunnels and cause the advanced lesions and scabs over the skin surface. They just burrow in a short distance and die. This causes inflammation and the resulting welt.
Eczema
skin disorders in dogs. One of the most common form of eczema is atopic dermatitis. The symptoms of eczema may vary from dog to dog. Common for eczema in dogs is a red itchy scalp. Another eczema symptom is a dry skin with scaly skin rashes. In other dogs small bumps occur that become moist and oozing.
It appears that the cause of eczema is an abnormal response of the dogs immune system. Eczema is not contagious. Dogs with eczema are prone to develop yeast infections.
Causes of eczema in dogseczema:
Industrial chemicals, detergents, fumes, paints, bleach, acidic foods, alcohol-containing skin care products and grooming fragrances
Allergens that increase eczema:
animal or vegetable proteins from commercial dog foods (food allergy), pollens
Stress, boredom, and loneliness cause itching and eczema
Extreme changes of the temperature:
Bringing your dog into an air-conditioned room after he was outside all day is stressful. Dogs cannot rapidly compensate this change. Better is clipping the dog down
[/list]Eczema treatment:Boost the dogs immune system
Soak or compress the eczema area with potassium permanganate.
Add Neem leaf tea, and evening primrose oil to the dog food until the eczema disappears.
Apply Neem oil to the dogs skin after bathing to decrease the itching skin rashes.
Bathing the dog with shampoo only if realy necessary. In most cases, the eczema will disappear very soon.
Common Diseases of the Bichon Frise
List compiled by Karen of Versailles Kennels Europes ONLY Fully testing Breeder
Corneal dystrophy: an abnormality of the cornea usually characterized by shallow pits in the surface.
Ciliary dyskinesia: congenital trait in several breeds where all ciliated cells (those with hairs or moving appendages) are deformed and rigid. Also called immotile cilia syndrome and Kartagener's syndrome. Causes chronic pneumonia and sterility. Common in bichon frise and Doberman pinschers.
Cataract: as in humans, a change in structure of the lens of the eye leading to cloudiness and usually to blindness.
Entropion: an abnormal rolling in of the eyelid.
Epilepsy: a disease characterized by convulsions (seizures) and/or disturbances of consciousness.
Factor IX deficiency or hemophilia B: same as hemophilia A, but more rare and involves a different clotting factor. Affects about 20 dog breeds.
Hemophilia B: a blood clotting disorder due to lack of coagulation factor IX.
Patella luxation: a condition where the knee caps slide in and out of place.
White dog shaker syndrome: a disorder mainly of white dogs having muscular tremors over entire body, incoordination and rapid eye movements. Episodes occur with stress or excitement.
Personally I think it will be a food allergy, may I suggest that you look at our site and register for more information as we specialise in these breeds and it would take up too much space here to add more info for you.
www.eurobichons.com
2006-12-29 00:35:06
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answer #10
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answered by Anonymous
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