45. allergodermatitis

Question 1

list the types of allergodermatitis

Answer 1

urticaria 
angioedema
food hypersensitivity 
contact hypersensitivity 
drug eruption 
intestinal parasitic hypersensitivity 
hormonal 
flea bite hypersensitivity

Question 2

ddx of pruritus / steps of examination

Answer 2

1. history
2. physical exam
3. skin scrape
4. +/- blood (sarcoptes serology, microfilaria)
5. diagnosis ex juvantibus
6. elimination
7. allergy test
8. skin biopsy

Question 3

urticaria

Answer 3

uncommon, dog, cat, type 1, 3 hypersensitivity
cause: drug, vaccine, bug bite
acute onset, wheals, variable pruritus
treat: corticosteroid, antihistamines

Question 4

angioedema

Answer 4

dog, cat, type 1 hypersensitivity
bee, wasp sting
extreme swelling of face, head or feet
epinephrine

Question 5

food hypersensitivity

Answer 5

dog, cat, type 1, 2, 4 
diet - fish, beef, chicken...
dog: pruritus, seborrhea, urticaria
cat: pruritus, milliard dermatitis 
Diag: elimination, provocation
treat: eliminate allergen

Question 6

contact hypersensitivity

Answer 6

dog, cat, uncommon, type 4
allergens: pollen, soap, ointment, rubber etc
elimination and provocation
remove allergen

Question 7

drug eruption

Answer 7

rare, dog, cat
can occur with new drug or after long treatment
discontinue drug

Question 8

intestinal parasite hypersensitivity

Answer 8

uncommon, dog, cat
pruritic crusting, papule, seborrhea
eliminate parasites

Question 9

hormonal hypersensitivity

Answer 9

rare, dog, intact bitch 
pruritic, papulocrusts on thigh, genital and perineal regions, symmetric 
enlarged nipples, vulva 
Diagnosis by treat: hormone therapy 
treat. neuter

Question 10

flea bite hypersensitivity

Answer 10

dog, comon, type 1, 4
miliary dermatitis
flea control