Exam 2 Derm Flashcards
True/False: Secondary lesions initially erupt as the result of an underlying disease and then they quickly disappear.
False
**primary lesions
What is the most common skin disease in canine species that are presenting with severe alopecia and pruritis?
a. Fleas
b. Food allergies
c. Atopic dermatitis
d. Superficial bacterial pyoderma
a. Fleas
Which of the following is a primary skin lesion?
a. Epidermal collarette
b. Lichenification
c. Fissure
d. Macule
e. Callus
d. Macule
Which of the following is a secondary skin lesion?
a. Papule
b. Excoriation
c. Pustule
d. Wheal
e. Nodule
b. Excoriation
Which of the following can be both a primary or secondary skin lesion?
a. Callus
b. Scar
c. Follicular casts
d. Tumor
e. Patch
c. Follicular casts
Which of the following tests would be done for demodex?
a. Deep scrape
b. Superficial scrape
c. Hair pluck/trichogram
d. Tape test
e. Fecal float
a. Deep scrape
Which of the following tests would be done to diagnose malassezia?
a. Deep scrape
b. Superficial scrape
c. Hair pluck/trichogram
d. Acetate tape test
e. Fecal float
d. Acetate tape test
Which of the following would help in the diagnosis of ancylostoma?
a. Deep scrape
b. Superficial scrape
c. Hair pluck/trichogram
d. Acetate tape test
e. Fecal float
e. Fecal float
Which of the following is false regarding woods lamp?
a. Its a fungal test that can be used to detect M. canis
b. Can have false positives due to the keratin, soaps, dyes, and meds
c. Need to wait 5-10 minutes before using it
d. All the above are true
d. All the above are true
Which of the following tests is gold standard for identifying environmental allergens?
a. Serology allergy test
b. Culture and sensitivity
c. Intradermal allergy test
d. Skin biopsy
e. Fungal culture
c. Intradermal allergy test
True/False: A fungal culture should be done on all cats with skin diseases and dogs with inflammatory lesions.
True
Which of the following is false regarding allergy testing serology?
a. They rely on antigen specific antibody levels
b. They rely on antibody specific antigen levels
c. They are quick and have no outlay
d. No sedation or clipping is required for this test
e. They’re not reliable tests for food allergens
b. They rely on antibody specific antigen levels
What are the three causes of pruritis?
Allergens
Ectoparasites
Infections
If a dog is seen licking or chewing at his feet what would you think the cause of this is?
Food allergy or atopy
What would you think of if a dog is presenting with derm signs of the elbows and ears?
Sarcoptic mange
Which of the following is not considered a disease that is extremly pruritic?
a. Flea bite allergy
b. Scabies
c. Atopic dermatitis
d. Food allergy
c. Atopic dermatitis
What two things do you think of if the owner said the itching came first?
Allergies and scabies
What comes to your mind if the lesions came first?
Demodex and Dermatophytosis
Which of the following does not cause a type 1 HST reaction?
a. Flea allergy dermatitis
b. Atopic dermatits
c. Contact dermatitis
d. Food allergy dermatitis
c. Contact dermatitis
**type 4 HST reaction
A dog comes into the clinic presenting with lumbosacral alopecia with lichenification and hyper pigmentation. You suspect that he has flea allergy dermatitis since its the most common. Which of the following is false?
a. You can do an intradermal flea allergy test to confirm diagnosis using saline as the negative control and histamine for the positive control
b. Elevated serum flea allergen is specifc for IgE
c. To eradicate the flea you much use a knock down product, insect growth regulator and environmental control
d. Monthly use of advantage will kill the adults and prevent egg shedding
e. Monthly use of Revolution will kill the adults and prevent the development of eggs and larvae
e. Monthly use of Revolution will kill the adults and prevent the development of eggs and larvae
**kills adults and prevents hatching, Vectra 3D prevents eggs and larva development
Which of the following is a knock down product that will eradicate fleas?
a. Capstar
b. Revolution
c. Promeris
d. Frontline Plus
e. Vectra 3D
a. Capstar
How often should animals be treated if fleas are on in contact animals?
Treat every 4 weeks
What is the most common flea in cats and what do they present with?
Ctenocephalides felis and can present with miliary dermatitis
What can we use to treat moderate to severe cases of secondary bacterial or yeast infections assocaited with flea allergy dermatitis once the pyoderma is eliminated?
Prednisolone to reduce/stop the pruritis
True/False: Atopic dermatitis causes a type 2 hypersenstiivity reaction to aeroallergens
False
**type 1
What are the common locations that we will see atopic dermatitis?
Paws Face Distal extremities Elbows Ventrum Otitis externa
True/False: Antihistamines and essential fatty acids should be avoided 2 weeks before performing an intradermal allergy test
True
Which of the following is false regarding allergy specifc immunotherapy (ASIT) for atopic dermatitis?
a. We want to slowly increase the dose/ quantity of the allergen over time
b. Subcutaneous and sublingual immunotherapy are the two forms of allergy shots
c. There are not many side effects with these but its very expensive
d. Sublingual dose should be increased slowly and subcutaneous should be given twice daily
d. Sublingual dose should be increased slowly and subcutaneous should be given twice daily
**SQ increase dose and concentration slowly, Sublingual give twice a day
Which of the following symptomatic relief therapeutics have weak evidence for atopic dermatitis?
a. Oclacitinib
b. Cyclosporine A
c. Dermoscent
d. Clemastine
e. Cytopoint
d. Clemastine
**antihistamine
A 2 year old Golden retriever comes in presenting with pruritus and alopecia on on his elbows, ventral abdomen and around his eyes. Which of the following is the gold standard test for this dog to diagnose him?
a. Serum RAST test which detects high levels of serum IgG diagnosing flea allergy dermatitis
b. ELISA to detect high levels of IgE diagnosing food allergy
c. Intradermal allergen test which diagnosed him with atopic dermatitis
d. Intradermal allergen test dianogising him with food allergies
c. Intradermal allergen test which diagnosed him with atopic dermatitis
Which of the following is an anti-allergic and immunosuppressive that is very efefctive for atopy and better to give on an empty stomach?
a. Crisis buster
b. Cyclosporine A
c. Apoquel
d. Cytopoint
e. Oclacitinib
b. Cyclosporine A
A dog comes into your clinic and presents with generalized pruritis and alopecia. He appears very bloated and has some discomfort with abdominal palpation. He has been vomiting and had diarrhea the night before. What is at the top of your differential list?
a. Atopic dermatitis
b. Flea allergy dermatitis
c. Contact dermatitis
d. Food allergy dermatitis
e. None of the above
d. Food allergy dermatitis
Which of the following are cats more likely to show allergies to?
a. Corn
b. Rice
c. Chicken
d. Beef
e. Wheat
d. Beef
**along with dairy and fish products
60% of dogs are going to show allergies to all of the following except:
a. Lamb and soy
b. Dairy products
c. Wheat
d. Beef
a. Lamb and soy
True/False: The major allergens are water soluble glycoproteins and the most common antigen in dogs and cats is beef protein.
True
Normally the food allergen is prevented by passing through the intestinal wall/barrier by?
Innate immunity
IgA antibodies lining the mucous layer
Which of the following cells does not capture the antigens in a normal response to food antigens?
a. Macrophages
b. Dendritic cells
c. Neutrophils
d. M- cells
e. Enterocytes
c. Neutrophils
Th1 cells are activated by the ____ response and Th2 cells are activated by the ___ response.
Th1 = cell mediated Th2 = humoral
Which of the following is true regarding Type 4 HST?
a. Th2 cells produce IgE which bind to mast cells and release vasoactive amines
b. This is the most common type of hypersensitivity
c. Pruritis, hyperemia and angioedema are the most common clinical signs related to vasoactive amines
d. If its severe enough we can have a systemic reaction leading to respiratory distress
e. Th1 cells attract macrophages and result in a granulomatous reaction
e. Th1 cells attract macrophages and result in a granulomatous reaction
What is the order from most common to least common hypersensitivity skin disease?
a. Fleas, food, atopy
b. Atopy, fleas, food
c. Fleas, atopy, food
d, Food, atopy, fleas
c. Fleas, atopy, food
Which of the following is not a common clinical sign in a type 1 HST due to the vasoactive amines?
a. Pruritis
b. Hypertension
c. Hyperemia
d. Angioedema
e. GIT signs
b. Hypertension
**if severe it causes hypotension
True/False: Food allergies are nonseasonal but may be worse in the summer because of the humidity which cause seconday infections.
True
Which of the following is the correct order from most common to least common of hypersensitivity skin diseases in a dog <6 months?
a. Fleas, food, atopy
b. Atopy, fleas, food
c. Fleas, atopy, food
d, Food, atopy, fleas
a. Fleas, food, atopy
Which of the following is not a common location for localized lesions in dogs with food allergies?
a. Muzzle
b. Axillae
c. Pinnae
d. Distal limbs
e. Interdigital spaces of paws
c. Pinnae
What are the most common places to see localized lesions in cats with food allergies?
Head/face
Pinnae
Neck
What is the only way to diagnose a food allergy condition?
Positive response to an elimination diet
True/False: Intradermal skin testing can be used to diangose food allergies.
False
**very inaccurate
Which of the following is false regarding treatment of food allergies?
a. The best diet is a homemade novel diet free of additives
b. Low allergy commercial diets consist of novel proteins and a carbohydrate source
c. Tofu and borwn rice combo seem to be the least allergenic
d. Larger particles can’t bind to the respective IgE particle on mast cells which prevents degranulation
d. Larger particles can’t bind to the respective IgE particle on mast cells which prevents degranulation
**smaller particles